feat: entities

internal/dal/authors.gen.go

@@ -37,6 +37,15 @@ func newAuthor(db *gorm.DB, opts ...gen.DOOption) author {
 			Posts struct {
 				field.RelationField
 			}
+			Comments struct {
+				field.RelationField
+				Author struct {
+					field.RelationField
+				}
+				Posts struct {
+					field.RelationField
+				}
+			}
 		}{
 			RelationField: field.NewRelation("Posts.Author", "models.Author"),
 			Posts: struct {
@@ -44,7 +53,44 @@ func newAuthor(db *gorm.DB, opts ...gen.DOOption) author {
 			}{
 				RelationField: field.NewRelation("Posts.Author.Posts", "models.Post"),
 			},
+			Comments: struct {
+				field.RelationField
+				Author struct {
+					field.RelationField
+				}
+				Posts struct {
+					field.RelationField
+				}
+			}{
+				RelationField: field.NewRelation("Posts.Author.Comments", "models.Comment"),
+				Author: struct {
+					field.RelationField
+				}{
+					RelationField: field.NewRelation("Posts.Author.Comments.Author", "models.Author"),
+				},
+				Posts: struct {
+					field.RelationField
+				}{
+					RelationField: field.NewRelation("Posts.Author.Comments.Posts", "models.Post"),
+				},
+			},
 		},
+		PostType: struct {
+			field.RelationField
+		}{
+			RelationField: field.NewRelation("Posts.PostType", "models.PostType"),
+		},
+		Comments: struct {
+			field.RelationField
+		}{
+			RelationField: field.NewRelation("Posts.Comments", "models.Comment"),
+		},
+	}
+
+	_author.Comments = authorHasManyComments{
+		db: db.Session(&gorm.Session{}),
+
+		RelationField: field.NewRelation("Comments", "models.Comment"),
 	}
 
 	_author.fillFieldMap()
@@ -60,6 +106,8 @@ type author struct {
 	Name  field.String
 	Posts authorHasManyPosts
 
+	Comments authorHasManyComments
+
 	fieldMap map[string]field.Expr
 }
 
@@ -93,7 +141,7 @@ func (a *author) GetFieldByName(fieldName string) (field.OrderExpr, bool) {
 }
 
 func (a *author) fillFieldMap() {
-	a.fieldMap = make(map[string]field.Expr, 3)
+	a.fieldMap = make(map[string]field.Expr, 4)
 	a.fieldMap["id"] = a.Id
 	a.fieldMap["name"] = a.Name
 
@@ -119,6 +167,21 @@ type authorHasManyPosts struct {
 		Posts struct {
 			field.RelationField
 		}
+		Comments struct {
+			field.RelationField
+			Author struct {
+				field.RelationField
+			}
+			Posts struct {
+				field.RelationField
+			}
+		}
+	}
+	PostType struct {
+		field.RelationField
+	}
+	Comments struct {
+		field.RelationField
 	}
 }
 
@@ -187,6 +250,77 @@ func (a authorHasManyPostsTx) Count() int64 {
 	return a.tx.Count()
 }
 
+type authorHasManyComments struct {
+	db *gorm.DB
+
+	field.RelationField
+}
+
+func (a authorHasManyComments) Where(conds ...field.Expr) *authorHasManyComments {
+	if len(conds) == 0 {
+		return &a
+	}
+
+	exprs := make([]clause.Expression, 0, len(conds))
+	for _, cond := range conds {
+		exprs = append(exprs, cond.BeCond().(clause.Expression))
+	}
+	a.db = a.db.Clauses(clause.Where{Exprs: exprs})
+	return &a
+}
+
+func (a authorHasManyComments) WithContext(ctx context.Context) *authorHasManyComments {
+	a.db = a.db.WithContext(ctx)
+	return &a
+}
+
+func (a authorHasManyComments) Session(session *gorm.Session) *authorHasManyComments {
+	a.db = a.db.Session(session)
+	return &a
+}
+
+func (a authorHasManyComments) Model(m *models.Author) *authorHasManyCommentsTx {
+	return &authorHasManyCommentsTx{a.db.Model(m).Association(a.Name())}
+}
+
+type authorHasManyCommentsTx struct{ tx *gorm.Association }
+
+func (a authorHasManyCommentsTx) Find() (result []*models.Comment, err error) {
+	return result, a.tx.Find(&result)
+}
+
+func (a authorHasManyCommentsTx) Append(values ...*models.Comment) (err error) {
+	targetValues := make([]interface{}, len(values))
+	for i, v := range values {
+		targetValues[i] = v
+	}
+	return a.tx.Append(targetValues...)
+}
+
+func (a authorHasManyCommentsTx) Replace(values ...*models.Comment) (err error) {
+	targetValues := make([]interface{}, len(values))
+	for i, v := range values {
+		targetValues[i] = v
+	}
+	return a.tx.Replace(targetValues...)
+}
+
+func (a authorHasManyCommentsTx) Delete(values ...*models.Comment) (err error) {
+	targetValues := make([]interface{}, len(values))
+	for i, v := range values {
+		targetValues[i] = v
+	}
+	return a.tx.Delete(targetValues...)
+}
+
+func (a authorHasManyCommentsTx) Clear() error {
+	return a.tx.Clear()
+}
+
+func (a authorHasManyCommentsTx) Count() int64 {
+	return a.tx.Count()
+}
+
 type authorDo struct{ gen.DO }
 
 type IAuthorDo interface {

internal/dal/comments.gen.go

@@ -0,0 +1,622 @@
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+
+package dal
+
+import (
+	"app/internal/models"
+	"context"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+	"gorm.io/gorm/schema"
+
+	"gorm.io/gen"
+	"gorm.io/gen/field"
+
+	"gorm.io/plugin/dbresolver"
+)
+
+func newComment(db *gorm.DB, opts ...gen.DOOption) comment {
+	_comment := comment{}
+
+	_comment.commentDo.UseDB(db, opts...)
+	_comment.commentDo.UseModel(&models.Comment{})
+
+	tableName := _comment.commentDo.TableName()
+	_comment.ALL = field.NewAsterisk(tableName)
+	_comment.Id = field.NewUint(tableName, "id")
+	_comment.Text = field.NewString(tableName, "text")
+	_comment.AuthorId = field.NewUint(tableName, "author_id")
+	_comment.Author = commentHasOneAuthor{
+		db: db.Session(&gorm.Session{}),
+
+		RelationField: field.NewRelation("Author", "models.Author"),
+		Posts: struct {
+			field.RelationField
+			Author struct {
+				field.RelationField
+			}
+			PostType struct {
+				field.RelationField
+			}
+			Comments struct {
+				field.RelationField
+				Author struct {
+					field.RelationField
+				}
+				Posts struct {
+					field.RelationField
+				}
+			}
+		}{
+			RelationField: field.NewRelation("Author.Posts", "models.Post"),
+			Author: struct {
+				field.RelationField
+			}{
+				RelationField: field.NewRelation("Author.Posts.Author", "models.Author"),
+			},
+			PostType: struct {
+				field.RelationField
+			}{
+				RelationField: field.NewRelation("Author.Posts.PostType", "models.PostType"),
+			},
+			Comments: struct {
+				field.RelationField
+				Author struct {
+					field.RelationField
+				}
+				Posts struct {
+					field.RelationField
+				}
+			}{
+				RelationField: field.NewRelation("Author.Posts.Comments", "models.Comment"),
+				Author: struct {
+					field.RelationField
+				}{
+					RelationField: field.NewRelation("Author.Posts.Comments.Author", "models.Author"),
+				},
+				Posts: struct {
+					field.RelationField
+				}{
+					RelationField: field.NewRelation("Author.Posts.Comments.Posts", "models.Post"),
+				},
+			},
+		},
+		Comments: struct {
+			field.RelationField
+		}{
+			RelationField: field.NewRelation("Author.Comments", "models.Comment"),
+		},
+	}
+
+	_comment.Posts = commentManyToManyPosts{
+		db: db.Session(&gorm.Session{}),
+
+		RelationField: field.NewRelation("Posts", "models.Post"),
+	}
+
+	_comment.fillFieldMap()
+
+	return _comment
+}
+
+type comment struct {
+	commentDo
+
+	ALL      field.Asterisk
+	Id       field.Uint
+	Text     field.String
+	AuthorId field.Uint
+	Author   commentHasOneAuthor
+
+	Posts commentManyToManyPosts
+
+	fieldMap map[string]field.Expr
+}
+
+func (c comment) Table(newTableName string) *comment {
+	c.commentDo.UseTable(newTableName)
+	return c.updateTableName(newTableName)
+}
+
+func (c comment) As(alias string) *comment {
+	c.commentDo.DO = *(c.commentDo.As(alias).(*gen.DO))
+	return c.updateTableName(alias)
+}
+
+func (c *comment) updateTableName(table string) *comment {
+	c.ALL = field.NewAsterisk(table)
+	c.Id = field.NewUint(table, "id")
+	c.Text = field.NewString(table, "text")
+	c.AuthorId = field.NewUint(table, "author_id")
+
+	c.fillFieldMap()
+
+	return c
+}
+
+func (c *comment) GetFieldByName(fieldName string) (field.OrderExpr, bool) {
+	_f, ok := c.fieldMap[fieldName]
+	if !ok || _f == nil {
+		return nil, false
+	}
+	_oe, ok := _f.(field.OrderExpr)
+	return _oe, ok
+}
+
+func (c *comment) fillFieldMap() {
+	c.fieldMap = make(map[string]field.Expr, 5)
+	c.fieldMap["id"] = c.Id
+	c.fieldMap["text"] = c.Text
+	c.fieldMap["author_id"] = c.AuthorId
+
+}
+
+func (c comment) clone(db *gorm.DB) comment {
+	c.commentDo.ReplaceConnPool(db.Statement.ConnPool)
+	return c
+}
+
+func (c comment) replaceDB(db *gorm.DB) comment {
+	c.commentDo.ReplaceDB(db)
+	return c
+}
+
+type commentHasOneAuthor struct {
+	db *gorm.DB
+
+	field.RelationField
+
+	Posts struct {
+		field.RelationField
+		Author struct {
+			field.RelationField
+		}
+		PostType struct {
+			field.RelationField
+		}
+		Comments struct {
+			field.RelationField
+			Author struct {
+				field.RelationField
+			}
+			Posts struct {
+				field.RelationField
+			}
+		}
+	}
+	Comments struct {
+		field.RelationField
+	}
+}
+
+func (a commentHasOneAuthor) Where(conds ...field.Expr) *commentHasOneAuthor {
+	if len(conds) == 0 {
+		return &a
+	}
+
+	exprs := make([]clause.Expression, 0, len(conds))
+	for _, cond := range conds {
+		exprs = append(exprs, cond.BeCond().(clause.Expression))
+	}
+	a.db = a.db.Clauses(clause.Where{Exprs: exprs})
+	return &a
+}
+
+func (a commentHasOneAuthor) WithContext(ctx context.Context) *commentHasOneAuthor {
+	a.db = a.db.WithContext(ctx)
+	return &a
+}
+
+func (a commentHasOneAuthor) Session(session *gorm.Session) *commentHasOneAuthor {
+	a.db = a.db.Session(session)
+	return &a
+}
+
+func (a commentHasOneAuthor) Model(m *models.Comment) *commentHasOneAuthorTx {
+	return &commentHasOneAuthorTx{a.db.Model(m).Association(a.Name())}
+}
+
+type commentHasOneAuthorTx struct{ tx *gorm.Association }
+
+func (a commentHasOneAuthorTx) Find() (result *models.Author, err error) {
+	return result, a.tx.Find(&result)
+}
+
+func (a commentHasOneAuthorTx) Append(values ...*models.Author) (err error) {
+	targetValues := make([]interface{}, len(values))
+	for i, v := range values {
+		targetValues[i] = v
+	}
+	return a.tx.Append(targetValues...)
+}
+
+func (a commentHasOneAuthorTx) Replace(values ...*models.Author) (err error) {
+	targetValues := make([]interface{}, len(values))
+	for i, v := range values {
+		targetValues[i] = v
+	}
+	return a.tx.Replace(targetValues...)
+}
+
+func (a commentHasOneAuthorTx) Delete(values ...*models.Author) (err error) {
+	targetValues := make([]interface{}, len(values))
+	for i, v := range values {
+		targetValues[i] = v
+	}
+	return a.tx.Delete(targetValues...)
+}
+
+func (a commentHasOneAuthorTx) Clear() error {
+	return a.tx.Clear()
+}
+
+func (a commentHasOneAuthorTx) Count() int64 {
+	return a.tx.Count()
+}
+
+type commentManyToManyPosts struct {
+	db *gorm.DB
+
+	field.RelationField
+}
+
+func (a commentManyToManyPosts) Where(conds ...field.Expr) *commentManyToManyPosts {
+	if len(conds) == 0 {
+		return &a
+	}
+
+	exprs := make([]clause.Expression, 0, len(conds))
+	for _, cond := range conds {
+		exprs = append(exprs, cond.BeCond().(clause.Expression))
+	}
+	a.db = a.db.Clauses(clause.Where{Exprs: exprs})
+	return &a
+}
+
+func (a commentManyToManyPosts) WithContext(ctx context.Context) *commentManyToManyPosts {
+	a.db = a.db.WithContext(ctx)
+	return &a
+}
+
+func (a commentManyToManyPosts) Session(session *gorm.Session) *commentManyToManyPosts {
+	a.db = a.db.Session(session)
+	return &a
+}
+
+func (a commentManyToManyPosts) Model(m *models.Comment) *commentManyToManyPostsTx {
+	return &commentManyToManyPostsTx{a.db.Model(m).Association(a.Name())}
+}
+
+type commentManyToManyPostsTx struct{ tx *gorm.Association }
+
+func (a commentManyToManyPostsTx) Find() (result []*models.Post, err error) {
+	return result, a.tx.Find(&result)
+}
+
+func (a commentManyToManyPostsTx) Append(values ...*models.Post) (err error) {
+	targetValues := make([]interface{}, len(values))
+	for i, v := range values {
+		targetValues[i] = v
+	}
+	return a.tx.Append(targetValues...)
+}
+
+func (a commentManyToManyPostsTx) Replace(values ...*models.Post) (err error) {
+	targetValues := make([]interface{}, len(values))
+	for i, v := range values {
+		targetValues[i] = v
+	}
+	return a.tx.Replace(targetValues...)
+}
+
+func (a commentManyToManyPostsTx) Delete(values ...*models.Post) (err error) {
+	targetValues := make([]interface{}, len(values))
+	for i, v := range values {
+		targetValues[i] = v
+	}
+	return a.tx.Delete(targetValues...)
+}
+
+func (a commentManyToManyPostsTx) Clear() error {
+	return a.tx.Clear()
+}
+
+func (a commentManyToManyPostsTx) Count() int64 {
+	return a.tx.Count()
+}
+
+type commentDo struct{ gen.DO }
+
+type ICommentDo interface {
+	gen.SubQuery
+	Debug() ICommentDo
+	WithContext(ctx context.Context) ICommentDo
+	WithResult(fc func(tx gen.Dao)) gen.ResultInfo
+	ReplaceDB(db *gorm.DB)
+	ReadDB() ICommentDo
+	WriteDB() ICommentDo
+	As(alias string) gen.Dao
+	Session(config *gorm.Session) ICommentDo
+	Columns(cols ...field.Expr) gen.Columns
+	Clauses(conds ...clause.Expression) ICommentDo
+	Not(conds ...gen.Condition) ICommentDo
+	Or(conds ...gen.Condition) ICommentDo
+	Select(conds ...field.Expr) ICommentDo
+	Where(conds ...gen.Condition) ICommentDo
+	Order(conds ...field.Expr) ICommentDo
+	Distinct(cols ...field.Expr) ICommentDo
+	Omit(cols ...field.Expr) ICommentDo
+	Join(table schema.Tabler, on ...field.Expr) ICommentDo
+	LeftJoin(table schema.Tabler, on ...field.Expr) ICommentDo
+	RightJoin(table schema.Tabler, on ...field.Expr) ICommentDo
+	Group(cols ...field.Expr) ICommentDo
+	Having(conds ...gen.Condition) ICommentDo
+	Limit(limit int) ICommentDo
+	Offset(offset int) ICommentDo
+	Count() (count int64, err error)
+	Scopes(funcs ...func(gen.Dao) gen.Dao) ICommentDo
+	Unscoped() ICommentDo
+	Create(values ...*models.Comment) error
+	CreateInBatches(values []*models.Comment, batchSize int) error
+	Save(values ...*models.Comment) error
+	First() (*models.Comment, error)
+	Take() (*models.Comment, error)
+	Last() (*models.Comment, error)
+	Find() ([]*models.Comment, error)
+	FindInBatch(batchSize int, fc func(tx gen.Dao, batch int) error) (results []*models.Comment, err error)
+	FindInBatches(result *[]*models.Comment, batchSize int, fc func(tx gen.Dao, batch int) error) error
+	Pluck(column field.Expr, dest interface{}) error
+	Delete(...*models.Comment) (info gen.ResultInfo, err error)
+	Update(column field.Expr, value interface{}) (info gen.ResultInfo, err error)
+	UpdateSimple(columns ...field.AssignExpr) (info gen.ResultInfo, err error)
+	Updates(value interface{}) (info gen.ResultInfo, err error)
+	UpdateColumn(column field.Expr, value interface{}) (info gen.ResultInfo, err error)
+	UpdateColumnSimple(columns ...field.AssignExpr) (info gen.ResultInfo, err error)
+	UpdateColumns(value interface{}) (info gen.ResultInfo, err error)
+	UpdateFrom(q gen.SubQuery) gen.Dao
+	Attrs(attrs ...field.AssignExpr) ICommentDo
+	Assign(attrs ...field.AssignExpr) ICommentDo
+	Joins(fields ...field.RelationField) ICommentDo
+	Preload(fields ...field.RelationField) ICommentDo
+	FirstOrInit() (*models.Comment, error)
+	FirstOrCreate() (*models.Comment, error)
+	FindByPage(offset int, limit int) (result []*models.Comment, count int64, err error)
+	ScanByPage(result interface{}, offset int, limit int) (count int64, err error)
+	Scan(result interface{}) (err error)
+	Returning(value interface{}, columns ...string) ICommentDo
+	UnderlyingDB() *gorm.DB
+	schema.Tabler
+}
+
+func (c commentDo) Debug() ICommentDo {
+	return c.withDO(c.DO.Debug())
+}
+
+func (c commentDo) WithContext(ctx context.Context) ICommentDo {
+	return c.withDO(c.DO.WithContext(ctx))
+}
+
+func (c commentDo) ReadDB() ICommentDo {
+	return c.Clauses(dbresolver.Read)
+}
+
+func (c commentDo) WriteDB() ICommentDo {
+	return c.Clauses(dbresolver.Write)
+}
+
+func (c commentDo) Session(config *gorm.Session) ICommentDo {
+	return c.withDO(c.DO.Session(config))
+}
+
+func (c commentDo) Clauses(conds ...clause.Expression) ICommentDo {
+	return c.withDO(c.DO.Clauses(conds...))
+}
+
+func (c commentDo) Returning(value interface{}, columns ...string) ICommentDo {
+	return c.withDO(c.DO.Returning(value, columns...))
+}
+
+func (c commentDo) Not(conds ...gen.Condition) ICommentDo {
+	return c.withDO(c.DO.Not(conds...))
+}
+
+func (c commentDo) Or(conds ...gen.Condition) ICommentDo {
+	return c.withDO(c.DO.Or(conds...))
+}
+
+func (c commentDo) Select(conds ...field.Expr) ICommentDo {
+	return c.withDO(c.DO.Select(conds...))
+}
+
+func (c commentDo) Where(conds ...gen.Condition) ICommentDo {
+	return c.withDO(c.DO.Where(conds...))
+}
+
+func (c commentDo) Order(conds ...field.Expr) ICommentDo {
+	return c.withDO(c.DO.Order(conds...))
+}
+
+func (c commentDo) Distinct(cols ...field.Expr) ICommentDo {
+	return c.withDO(c.DO.Distinct(cols...))
+}
+
+func (c commentDo) Omit(cols ...field.Expr) ICommentDo {
+	return c.withDO(c.DO.Omit(cols...))
+}
+
+func (c commentDo) Join(table schema.Tabler, on ...field.Expr) ICommentDo {
+	return c.withDO(c.DO.Join(table, on...))
+}
+
+func (c commentDo) LeftJoin(table schema.Tabler, on ...field.Expr) ICommentDo {
+	return c.withDO(c.DO.LeftJoin(table, on...))
+}
+
+func (c commentDo) RightJoin(table schema.Tabler, on ...field.Expr) ICommentDo {
+	return c.withDO(c.DO.RightJoin(table, on...))
+}
+
+func (c commentDo) Group(cols ...field.Expr) ICommentDo {
+	return c.withDO(c.DO.Group(cols...))
+}
+
+func (c commentDo) Having(conds ...gen.Condition) ICommentDo {
+	return c.withDO(c.DO.Having(conds...))
+}
+
+func (c commentDo) Limit(limit int) ICommentDo {
+	return c.withDO(c.DO.Limit(limit))
+}
+
+func (c commentDo) Offset(offset int) ICommentDo {
+	return c.withDO(c.DO.Offset(offset))
+}
+
+func (c commentDo) Scopes(funcs ...func(gen.Dao) gen.Dao) ICommentDo {
+	return c.withDO(c.DO.Scopes(funcs...))
+}
+
+func (c commentDo) Unscoped() ICommentDo {
+	return c.withDO(c.DO.Unscoped())
+}
+
+func (c commentDo) Create(values ...*models.Comment) error {
+	if len(values) == 0 {
+		return nil
+	}
+	return c.DO.Create(values)
+}
+
+func (c commentDo) CreateInBatches(values []*models.Comment, batchSize int) error {
+	return c.DO.CreateInBatches(values, batchSize)
+}
+
+// Save : !!! underlying implementation is different with GORM
+// The method is equivalent to executing the statement: db.Clauses(clause.OnConflict{UpdateAll: true}).Create(values)
+func (c commentDo) Save(values ...*models.Comment) error {
+	if len(values) == 0 {
+		return nil
+	}
+	return c.DO.Save(values)
+}
+
+func (c commentDo) First() (*models.Comment, error) {
+	if result, err := c.DO.First(); err != nil {
+		return nil, err
+	} else {
+		return result.(*models.Comment), nil
+	}
+}
+
+func (c commentDo) Take() (*models.Comment, error) {
+	if result, err := c.DO.Take(); err != nil {
+		return nil, err
+	} else {
+		return result.(*models.Comment), nil
+	}
+}
+
+func (c commentDo) Last() (*models.Comment, error) {
+	if result, err := c.DO.Last(); err != nil {
+		return nil, err
+	} else {
+		return result.(*models.Comment), nil
+	}
+}
+
+func (c commentDo) Find() ([]*models.Comment, error) {
+	result, err := c.DO.Find()
+	return result.([]*models.Comment), err
+}
+
+func (c commentDo) FindInBatch(batchSize int, fc func(tx gen.Dao, batch int) error) (results []*models.Comment, err error) {
+	buf := make([]*models.Comment, 0, batchSize)
+	err = c.DO.FindInBatches(&buf, batchSize, func(tx gen.Dao, batch int) error {
+		defer func() { results = append(results, buf...) }()
+		return fc(tx, batch)
+	})
+	return results, err
+}
+
+func (c commentDo) FindInBatches(result *[]*models.Comment, batchSize int, fc func(tx gen.Dao, batch int) error) error {
+	return c.DO.FindInBatches(result, batchSize, fc)
+}
+
+func (c commentDo) Attrs(attrs ...field.AssignExpr) ICommentDo {
+	return c.withDO(c.DO.Attrs(attrs...))
+}
+
+func (c commentDo) Assign(attrs ...field.AssignExpr) ICommentDo {
+	return c.withDO(c.DO.Assign(attrs...))
+}
+
+func (c commentDo) Joins(fields ...field.RelationField) ICommentDo {
+	for _, _f := range fields {
+		c = *c.withDO(c.DO.Joins(_f))
+	}
+	return &c
+}
+
+func (c commentDo) Preload(fields ...field.RelationField) ICommentDo {
+	for _, _f := range fields {
+		c = *c.withDO(c.DO.Preload(_f))
+	}
+	return &c
+}
+
+func (c commentDo) FirstOrInit() (*models.Comment, error) {
+	if result, err := c.DO.FirstOrInit(); err != nil {
+		return nil, err
+	} else {
+		return result.(*models.Comment), nil
+	}
+}
+
+func (c commentDo) FirstOrCreate() (*models.Comment, error) {
+	if result, err := c.DO.FirstOrCreate(); err != nil {
+		return nil, err
+	} else {
+		return result.(*models.Comment), nil
+	}
+}
+
+func (c commentDo) FindByPage(offset int, limit int) (result []*models.Comment, count int64, err error) {
+	result, err = c.Offset(offset).Limit(limit).Find()
+	if err != nil {
+		return
+	}
+
+	if size := len(result); 0 < limit && 0 < size && size < limit {
+		count = int64(size + offset)
+		return
+	}
+
+	count, err = c.Offset(-1).Limit(-1).Count()
+	return
+}
+
+func (c commentDo) ScanByPage(result interface{}, offset int, limit int) (count int64, err error) {
+	count, err = c.Count()
+	if err != nil {
+		return
+	}
+
+	err = c.Offset(offset).Limit(limit).Scan(result)
+	return
+}
+
+func (c commentDo) Scan(result interface{}) (err error) {
+	return c.DO.Scan(result)
+}
+
+func (c commentDo) Delete(models ...*models.Comment) (result gen.ResultInfo, err error) {
+	return c.DO.Delete(models)
+}
+
+func (c *commentDo) withDO(do gen.Dao) *commentDo {
+	c.DO = *do.(*gen.DO)
+	return c
+}

internal/dal/comments.gen_test.go

@@ -0,0 +1,145 @@
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+
+package dal
+
+import (
+	"app/internal/models"
+	"context"
+	"fmt"
+	"testing"
+
+	"gorm.io/gen"
+	"gorm.io/gen/field"
+	"gorm.io/gorm/clause"
+)
+
+func init() {
+	InitializeDB()
+	err := _gen_test_db.AutoMigrate(&models.Comment{})
+	if err != nil {
+		fmt.Printf("Error: AutoMigrate(&models.Comment{}) fail: %s", err)
+	}
+}
+
+func Test_commentQuery(t *testing.T) {
+	comment := newComment(_gen_test_db)
+	comment = *comment.As(comment.TableName())
+	_do := comment.WithContext(context.Background()).Debug()
+
+	primaryKey := field.NewString(comment.TableName(), clause.PrimaryKey)
+	_, err := _do.Unscoped().Where(primaryKey.IsNotNull()).Delete()
+	if err != nil {
+		t.Error("clean table <comments> fail:", err)
+		return
+	}
+
+	_, ok := comment.GetFieldByName("")
+	if ok {
+		t.Error("GetFieldByName(\"\") from comment success")
+	}
+
+	err = _do.Create(&models.Comment{})
+	if err != nil {
+		t.Error("create item in table <comments> fail:", err)
+	}
+
+	err = _do.Save(&models.Comment{})
+	if err != nil {
+		t.Error("create item in table <comments> fail:", err)
+	}
+
+	err = _do.CreateInBatches([]*models.Comment{{}, {}}, 10)
+	if err != nil {
+		t.Error("create item in table <comments> fail:", err)
+	}
+
+	_, err = _do.Select(comment.ALL).Take()
+	if err != nil {
+		t.Error("Take() on table <comments> fail:", err)
+	}
+
+	_, err = _do.First()
+	if err != nil {
+		t.Error("First() on table <comments> fail:", err)
+	}
+
+	_, err = _do.Last()
+	if err != nil {
+		t.Error("First() on table <comments> fail:", err)
+	}
+
+	_, err = _do.Where(primaryKey.IsNotNull()).FindInBatch(10, func(tx gen.Dao, batch int) error { return nil })
+	if err != nil {
+		t.Error("FindInBatch() on table <comments> fail:", err)
+	}
+
+	err = _do.Where(primaryKey.IsNotNull()).FindInBatches(&[]*models.Comment{}, 10, func(tx gen.Dao, batch int) error { return nil })
+	if err != nil {
+		t.Error("FindInBatches() on table <comments> fail:", err)
+	}
+
+	_, err = _do.Select(comment.ALL).Where(primaryKey.IsNotNull()).Order(primaryKey.Desc()).Find()
+	if err != nil {
+		t.Error("Find() on table <comments> fail:", err)
+	}
+
+	_, err = _do.Distinct(primaryKey).Take()
+	if err != nil {
+		t.Error("select Distinct() on table <comments> fail:", err)
+	}
+
+	_, err = _do.Select(comment.ALL).Omit(primaryKey).Take()
+	if err != nil {
+		t.Error("Omit() on table <comments> fail:", err)
+	}
+
+	_, err = _do.Group(primaryKey).Find()
+	if err != nil {
+		t.Error("Group() on table <comments> fail:", err)
+	}
+
+	_, err = _do.Scopes(func(dao gen.Dao) gen.Dao { return dao.Where(primaryKey.IsNotNull()) }).Find()
+	if err != nil {
+		t.Error("Scopes() on table <comments> fail:", err)
+	}
+
+	_, _, err = _do.FindByPage(0, 1)
+	if err != nil {
+		t.Error("FindByPage() on table <comments> fail:", err)
+	}
+
+	_, err = _do.ScanByPage(&models.Comment{}, 0, 1)
+	if err != nil {
+		t.Error("ScanByPage() on table <comments> fail:", err)
+	}
+
+	_, err = _do.Attrs(primaryKey).Assign(primaryKey).FirstOrInit()
+	if err != nil {
+		t.Error("FirstOrInit() on table <comments> fail:", err)
+	}
+
+	_, err = _do.Attrs(primaryKey).Assign(primaryKey).FirstOrCreate()
+	if err != nil {
+		t.Error("FirstOrCreate() on table <comments> fail:", err)
+	}
+
+	var _a _another
+	var _aPK = field.NewString(_a.TableName(), "id")
+
+	err = _do.Join(&_a, primaryKey.EqCol(_aPK)).Scan(map[string]interface{}{})
+	if err != nil {
+		t.Error("Join() on table <comments> fail:", err)
+	}
+
+	err = _do.LeftJoin(&_a, primaryKey.EqCol(_aPK)).Scan(map[string]interface{}{})
+	if err != nil {
+		t.Error("LeftJoin() on table <comments> fail:", err)
+	}
+
+	_, err = _do.Not().Or().Clauses().Take()
+	if err != nil {
+		t.Error("Not/Or/Clauses on table <comments> fail:", err)
+	}
+}

internal/dal/gen.go

@@ -16,39 +16,49 @@ import (
 )
 
 var (
-	Q      = new(Query)
-	Author *author
-	Post   *post
+	Q        = new(Query)
+	Author   *author
+	Comment  *comment
+	Post     *post
+	PostType *postType
 )
 
 func SetDefault(db *gorm.DB, opts ...gen.DOOption) {
 	*Q = *Use(db, opts...)
 	Author = &Q.Author
+	Comment = &Q.Comment
 	Post = &Q.Post
+	PostType = &Q.PostType
 }
 
 func Use(db *gorm.DB, opts ...gen.DOOption) *Query {
 	return &Query{
-		db:     db,
-		Author: newAuthor(db, opts...),
-		Post:   newPost(db, opts...),
+		db:       db,
+		Author:   newAuthor(db, opts...),
+		Comment:  newComment(db, opts...),
+		Post:     newPost(db, opts...),
+		PostType: newPostType(db, opts...),
 	}
 }
 
 type Query struct {
 	db *gorm.DB
 
-	Author author
-	Post   post
+	Author   author
+	Comment  comment
+	Post     post
+	PostType postType
 }
 
 func (q *Query) Available() bool { return q.db != nil }
 
 func (q *Query) clone(db *gorm.DB) *Query {
 	return &Query{
-		db:     db,
-		Author: q.Author.clone(db),
-		Post:   q.Post.clone(db),
+		db:       db,
+		Author:   q.Author.clone(db),
+		Comment:  q.Comment.clone(db),
+		Post:     q.Post.clone(db),
+		PostType: q.PostType.clone(db),
 	}
 }
 
@@ -62,21 +72,27 @@ func (q *Query) WriteDB() *Query {
 
 func (q *Query) ReplaceDB(db *gorm.DB) *Query {
 	return &Query{
-		db:     db,
-		Author: q.Author.replaceDB(db),
-		Post:   q.Post.replaceDB(db),
+		db:       db,
+		Author:   q.Author.replaceDB(db),
+		Comment:  q.Comment.replaceDB(db),
+		Post:     q.Post.replaceDB(db),
+		PostType: q.PostType.replaceDB(db),
 	}
 }
 
 type queryCtx struct {
-	Author IAuthorDo
-	Post   IPostDo
+	Author   IAuthorDo
+	Comment  ICommentDo
+	Post     IPostDo
+	PostType IPostTypeDo
 }
 
 func (q *Query) WithContext(ctx context.Context) *queryCtx {
 	return &queryCtx{
-		Author: q.Author.WithContext(ctx),
-		Post:   q.Post.WithContext(ctx),
+		Author:   q.Author.WithContext(ctx),
+		Comment:  q.Comment.WithContext(ctx),
+		Post:     q.Post.WithContext(ctx),
+		PostType: q.PostType.WithContext(ctx),
 	}
 }
 

internal/dal/gen_test.go

@@ -78,7 +78,9 @@ func Test_WithContext(t *testing.T) {
 
 	for _, ctx := range []context.Context{
 		qCtx.Author.UnderlyingDB().Statement.Context,
+		qCtx.Comment.UnderlyingDB().Statement.Context,
 		qCtx.Post.UnderlyingDB().Statement.Context,
+		qCtx.PostType.UnderlyingDB().Statement.Context,
 	} {
 		if v := ctx.Value(key); v != value {
 			t.Errorf("get value from context fail, expect %q, got %q", value, v)

internal/dal/post_types.gen.go

@@ -0,0 +1,383 @@
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+
+package dal
+
+import (
+	"app/internal/models"
+	"context"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+	"gorm.io/gorm/schema"
+
+	"gorm.io/gen"
+	"gorm.io/gen/field"
+
+	"gorm.io/plugin/dbresolver"
+)
+
+func newPostType(db *gorm.DB, opts ...gen.DOOption) postType {
+	_postType := postType{}
+
+	_postType.postTypeDo.UseDB(db, opts...)
+	_postType.postTypeDo.UseModel(&models.PostType{})
+
+	tableName := _postType.postTypeDo.TableName()
+	_postType.ALL = field.NewAsterisk(tableName)
+	_postType.Id = field.NewUint(tableName, "id")
+	_postType.Name = field.NewString(tableName, "name")
+
+	_postType.fillFieldMap()
+
+	return _postType
+}
+
+type postType struct {
+	postTypeDo
+
+	ALL  field.Asterisk
+	Id   field.Uint
+	Name field.String
+
+	fieldMap map[string]field.Expr
+}
+
+func (p postType) Table(newTableName string) *postType {
+	p.postTypeDo.UseTable(newTableName)
+	return p.updateTableName(newTableName)
+}
+
+func (p postType) As(alias string) *postType {
+	p.postTypeDo.DO = *(p.postTypeDo.As(alias).(*gen.DO))
+	return p.updateTableName(alias)
+}
+
+func (p *postType) updateTableName(table string) *postType {
+	p.ALL = field.NewAsterisk(table)
+	p.Id = field.NewUint(table, "id")
+	p.Name = field.NewString(table, "name")
+
+	p.fillFieldMap()
+
+	return p
+}
+
+func (p *postType) GetFieldByName(fieldName string) (field.OrderExpr, bool) {
+	_f, ok := p.fieldMap[fieldName]
+	if !ok || _f == nil {
+		return nil, false
+	}
+	_oe, ok := _f.(field.OrderExpr)
+	return _oe, ok
+}
+
+func (p *postType) fillFieldMap() {
+	p.fieldMap = make(map[string]field.Expr, 2)
+	p.fieldMap["id"] = p.Id
+	p.fieldMap["name"] = p.Name
+}
+
+func (p postType) clone(db *gorm.DB) postType {
+	p.postTypeDo.ReplaceConnPool(db.Statement.ConnPool)
+	return p
+}
+
+func (p postType) replaceDB(db *gorm.DB) postType {
+	p.postTypeDo.ReplaceDB(db)
+	return p
+}
+
+type postTypeDo struct{ gen.DO }
+
+type IPostTypeDo interface {
+	gen.SubQuery
+	Debug() IPostTypeDo
+	WithContext(ctx context.Context) IPostTypeDo
+	WithResult(fc func(tx gen.Dao)) gen.ResultInfo
+	ReplaceDB(db *gorm.DB)
+	ReadDB() IPostTypeDo
+	WriteDB() IPostTypeDo
+	As(alias string) gen.Dao
+	Session(config *gorm.Session) IPostTypeDo
+	Columns(cols ...field.Expr) gen.Columns
+	Clauses(conds ...clause.Expression) IPostTypeDo
+	Not(conds ...gen.Condition) IPostTypeDo
+	Or(conds ...gen.Condition) IPostTypeDo
+	Select(conds ...field.Expr) IPostTypeDo
+	Where(conds ...gen.Condition) IPostTypeDo
+	Order(conds ...field.Expr) IPostTypeDo
+	Distinct(cols ...field.Expr) IPostTypeDo
+	Omit(cols ...field.Expr) IPostTypeDo
+	Join(table schema.Tabler, on ...field.Expr) IPostTypeDo
+	LeftJoin(table schema.Tabler, on ...field.Expr) IPostTypeDo
+	RightJoin(table schema.Tabler, on ...field.Expr) IPostTypeDo
+	Group(cols ...field.Expr) IPostTypeDo
+	Having(conds ...gen.Condition) IPostTypeDo
+	Limit(limit int) IPostTypeDo
+	Offset(offset int) IPostTypeDo
+	Count() (count int64, err error)
+	Scopes(funcs ...func(gen.Dao) gen.Dao) IPostTypeDo
+	Unscoped() IPostTypeDo
+	Create(values ...*models.PostType) error
+	CreateInBatches(values []*models.PostType, batchSize int) error
+	Save(values ...*models.PostType) error
+	First() (*models.PostType, error)
+	Take() (*models.PostType, error)
+	Last() (*models.PostType, error)
+	Find() ([]*models.PostType, error)
+	FindInBatch(batchSize int, fc func(tx gen.Dao, batch int) error) (results []*models.PostType, err error)
+	FindInBatches(result *[]*models.PostType, batchSize int, fc func(tx gen.Dao, batch int) error) error
+	Pluck(column field.Expr, dest interface{}) error
+	Delete(...*models.PostType) (info gen.ResultInfo, err error)
+	Update(column field.Expr, value interface{}) (info gen.ResultInfo, err error)
+	UpdateSimple(columns ...field.AssignExpr) (info gen.ResultInfo, err error)
+	Updates(value interface{}) (info gen.ResultInfo, err error)
+	UpdateColumn(column field.Expr, value interface{}) (info gen.ResultInfo, err error)
+	UpdateColumnSimple(columns ...field.AssignExpr) (info gen.ResultInfo, err error)
+	UpdateColumns(value interface{}) (info gen.ResultInfo, err error)
+	UpdateFrom(q gen.SubQuery) gen.Dao
+	Attrs(attrs ...field.AssignExpr) IPostTypeDo
+	Assign(attrs ...field.AssignExpr) IPostTypeDo
+	Joins(fields ...field.RelationField) IPostTypeDo
+	Preload(fields ...field.RelationField) IPostTypeDo
+	FirstOrInit() (*models.PostType, error)
+	FirstOrCreate() (*models.PostType, error)
+	FindByPage(offset int, limit int) (result []*models.PostType, count int64, err error)
+	ScanByPage(result interface{}, offset int, limit int) (count int64, err error)
+	Scan(result interface{}) (err error)
+	Returning(value interface{}, columns ...string) IPostTypeDo
+	UnderlyingDB() *gorm.DB
+	schema.Tabler
+}
+
+func (p postTypeDo) Debug() IPostTypeDo {
+	return p.withDO(p.DO.Debug())
+}
+
+func (p postTypeDo) WithContext(ctx context.Context) IPostTypeDo {
+	return p.withDO(p.DO.WithContext(ctx))
+}
+
+func (p postTypeDo) ReadDB() IPostTypeDo {
+	return p.Clauses(dbresolver.Read)
+}
+
+func (p postTypeDo) WriteDB() IPostTypeDo {
+	return p.Clauses(dbresolver.Write)
+}
+
+func (p postTypeDo) Session(config *gorm.Session) IPostTypeDo {
+	return p.withDO(p.DO.Session(config))
+}
+
+func (p postTypeDo) Clauses(conds ...clause.Expression) IPostTypeDo {
+	return p.withDO(p.DO.Clauses(conds...))
+}
+
+func (p postTypeDo) Returning(value interface{}, columns ...string) IPostTypeDo {
+	return p.withDO(p.DO.Returning(value, columns...))
+}
+
+func (p postTypeDo) Not(conds ...gen.Condition) IPostTypeDo {
+	return p.withDO(p.DO.Not(conds...))
+}
+
+func (p postTypeDo) Or(conds ...gen.Condition) IPostTypeDo {
+	return p.withDO(p.DO.Or(conds...))
+}
+
+func (p postTypeDo) Select(conds ...field.Expr) IPostTypeDo {
+	return p.withDO(p.DO.Select(conds...))
+}
+
+func (p postTypeDo) Where(conds ...gen.Condition) IPostTypeDo {
+	return p.withDO(p.DO.Where(conds...))
+}
+
+func (p postTypeDo) Order(conds ...field.Expr) IPostTypeDo {
+	return p.withDO(p.DO.Order(conds...))
+}
+
+func (p postTypeDo) Distinct(cols ...field.Expr) IPostTypeDo {
+	return p.withDO(p.DO.Distinct(cols...))
+}
+
+func (p postTypeDo) Omit(cols ...field.Expr) IPostTypeDo {
+	return p.withDO(p.DO.Omit(cols...))
+}
+
+func (p postTypeDo) Join(table schema.Tabler, on ...field.Expr) IPostTypeDo {
+	return p.withDO(p.DO.Join(table, on...))
+}
+
+func (p postTypeDo) LeftJoin(table schema.Tabler, on ...field.Expr) IPostTypeDo {
+	return p.withDO(p.DO.LeftJoin(table, on...))
+}
+
+func (p postTypeDo) RightJoin(table schema.Tabler, on ...field.Expr) IPostTypeDo {
+	return p.withDO(p.DO.RightJoin(table, on...))
+}
+
+func (p postTypeDo) Group(cols ...field.Expr) IPostTypeDo {
+	return p.withDO(p.DO.Group(cols...))
+}
+
+func (p postTypeDo) Having(conds ...gen.Condition) IPostTypeDo {
+	return p.withDO(p.DO.Having(conds...))
+}
+
+func (p postTypeDo) Limit(limit int) IPostTypeDo {
+	return p.withDO(p.DO.Limit(limit))
+}
+
+func (p postTypeDo) Offset(offset int) IPostTypeDo {
+	return p.withDO(p.DO.Offset(offset))
+}
+
+func (p postTypeDo) Scopes(funcs ...func(gen.Dao) gen.Dao) IPostTypeDo {
+	return p.withDO(p.DO.Scopes(funcs...))
+}
+
+func (p postTypeDo) Unscoped() IPostTypeDo {
+	return p.withDO(p.DO.Unscoped())
+}
+
+func (p postTypeDo) Create(values ...*models.PostType) error {
+	if len(values) == 0 {
+		return nil
+	}
+	return p.DO.Create(values)
+}
+
+func (p postTypeDo) CreateInBatches(values []*models.PostType, batchSize int) error {
+	return p.DO.CreateInBatches(values, batchSize)
+}
+
+// Save : !!! underlying implementation is different with GORM
+// The method is equivalent to executing the statement: db.Clauses(clause.OnConflict{UpdateAll: true}).Create(values)
+func (p postTypeDo) Save(values ...*models.PostType) error {
+	if len(values) == 0 {
+		return nil
+	}
+	return p.DO.Save(values)
+}
+
+func (p postTypeDo) First() (*models.PostType, error) {
+	if result, err := p.DO.First(); err != nil {
+		return nil, err
+	} else {
+		return result.(*models.PostType), nil
+	}
+}
+
+func (p postTypeDo) Take() (*models.PostType, error) {
+	if result, err := p.DO.Take(); err != nil {
+		return nil, err
+	} else {
+		return result.(*models.PostType), nil
+	}
+}
+
+func (p postTypeDo) Last() (*models.PostType, error) {
+	if result, err := p.DO.Last(); err != nil {
+		return nil, err
+	} else {
+		return result.(*models.PostType), nil
+	}
+}
+
+func (p postTypeDo) Find() ([]*models.PostType, error) {
+	result, err := p.DO.Find()
+	return result.([]*models.PostType), err
+}
+
+func (p postTypeDo) FindInBatch(batchSize int, fc func(tx gen.Dao, batch int) error) (results []*models.PostType, err error) {
+	buf := make([]*models.PostType, 0, batchSize)
+	err = p.DO.FindInBatches(&buf, batchSize, func(tx gen.Dao, batch int) error {
+		defer func() { results = append(results, buf...) }()
+		return fc(tx, batch)
+	})
+	return results, err
+}
+
+func (p postTypeDo) FindInBatches(result *[]*models.PostType, batchSize int, fc func(tx gen.Dao, batch int) error) error {
+	return p.DO.FindInBatches(result, batchSize, fc)
+}
+
+func (p postTypeDo) Attrs(attrs ...field.AssignExpr) IPostTypeDo {
+	return p.withDO(p.DO.Attrs(attrs...))
+}
+
+func (p postTypeDo) Assign(attrs ...field.AssignExpr) IPostTypeDo {
+	return p.withDO(p.DO.Assign(attrs...))
+}
+
+func (p postTypeDo) Joins(fields ...field.RelationField) IPostTypeDo {
+	for _, _f := range fields {
+		p = *p.withDO(p.DO.Joins(_f))
+	}
+	return &p
+}
+
+func (p postTypeDo) Preload(fields ...field.RelationField) IPostTypeDo {
+	for _, _f := range fields {
+		p = *p.withDO(p.DO.Preload(_f))
+	}
+	return &p
+}
+
+func (p postTypeDo) FirstOrInit() (*models.PostType, error) {
+	if result, err := p.DO.FirstOrInit(); err != nil {
+		return nil, err
+	} else {
+		return result.(*models.PostType), nil
+	}
+}
+
+func (p postTypeDo) FirstOrCreate() (*models.PostType, error) {
+	if result, err := p.DO.FirstOrCreate(); err != nil {
+		return nil, err
+	} else {
+		return result.(*models.PostType), nil
+	}
+}
+
+func (p postTypeDo) FindByPage(offset int, limit int) (result []*models.PostType, count int64, err error) {
+	result, err = p.Offset(offset).Limit(limit).Find()
+	if err != nil {
+		return
+	}
+
+	if size := len(result); 0 < limit && 0 < size && size < limit {
+		count = int64(size + offset)
+		return
+	}
+
+	count, err = p.Offset(-1).Limit(-1).Count()
+	return
+}
+
+func (p postTypeDo) ScanByPage(result interface{}, offset int, limit int) (count int64, err error) {
+	count, err = p.Count()
+	if err != nil {
+		return
+	}
+
+	err = p.Offset(offset).Limit(limit).Scan(result)
+	return
+}
+
+func (p postTypeDo) Scan(result interface{}) (err error) {
+	return p.DO.Scan(result)
+}
+
+func (p postTypeDo) Delete(models ...*models.PostType) (result gen.ResultInfo, err error) {
+	return p.DO.Delete(models)
+}
+
+func (p *postTypeDo) withDO(do gen.Dao) *postTypeDo {
+	p.DO = *do.(*gen.DO)
+	return p
+}

internal/dal/post_types.gen_test.go

@@ -0,0 +1,145 @@
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+
+package dal
+
+import (
+	"app/internal/models"
+	"context"
+	"fmt"
+	"testing"
+
+	"gorm.io/gen"
+	"gorm.io/gen/field"
+	"gorm.io/gorm/clause"
+)
+
+func init() {
+	InitializeDB()
+	err := _gen_test_db.AutoMigrate(&models.PostType{})
+	if err != nil {
+		fmt.Printf("Error: AutoMigrate(&models.PostType{}) fail: %s", err)
+	}
+}
+
+func Test_postTypeQuery(t *testing.T) {
+	postType := newPostType(_gen_test_db)
+	postType = *postType.As(postType.TableName())
+	_do := postType.WithContext(context.Background()).Debug()
+
+	primaryKey := field.NewString(postType.TableName(), clause.PrimaryKey)
+	_, err := _do.Unscoped().Where(primaryKey.IsNotNull()).Delete()
+	if err != nil {
+		t.Error("clean table <post_types> fail:", err)
+		return
+	}
+
+	_, ok := postType.GetFieldByName("")
+	if ok {
+		t.Error("GetFieldByName(\"\") from postType success")
+	}
+
+	err = _do.Create(&models.PostType{})
+	if err != nil {
+		t.Error("create item in table <post_types> fail:", err)
+	}
+
+	err = _do.Save(&models.PostType{})
+	if err != nil {
+		t.Error("create item in table <post_types> fail:", err)
+	}
+
+	err = _do.CreateInBatches([]*models.PostType{{}, {}}, 10)
+	if err != nil {
+		t.Error("create item in table <post_types> fail:", err)
+	}
+
+	_, err = _do.Select(postType.ALL).Take()
+	if err != nil {
+		t.Error("Take() on table <post_types> fail:", err)
+	}
+
+	_, err = _do.First()
+	if err != nil {
+		t.Error("First() on table <post_types> fail:", err)
+	}
+
+	_, err = _do.Last()
+	if err != nil {
+		t.Error("First() on table <post_types> fail:", err)
+	}
+
+	_, err = _do.Where(primaryKey.IsNotNull()).FindInBatch(10, func(tx gen.Dao, batch int) error { return nil })
+	if err != nil {
+		t.Error("FindInBatch() on table <post_types> fail:", err)
+	}
+
+	err = _do.Where(primaryKey.IsNotNull()).FindInBatches(&[]*models.PostType{}, 10, func(tx gen.Dao, batch int) error { return nil })
+	if err != nil {
+		t.Error("FindInBatches() on table <post_types> fail:", err)
+	}
+
+	_, err = _do.Select(postType.ALL).Where(primaryKey.IsNotNull()).Order(primaryKey.Desc()).Find()
+	if err != nil {
+		t.Error("Find() on table <post_types> fail:", err)
+	}
+
+	_, err = _do.Distinct(primaryKey).Take()
+	if err != nil {
+		t.Error("select Distinct() on table <post_types> fail:", err)
+	}
+
+	_, err = _do.Select(postType.ALL).Omit(primaryKey).Take()
+	if err != nil {
+		t.Error("Omit() on table <post_types> fail:", err)
+	}
+
+	_, err = _do.Group(primaryKey).Find()
+	if err != nil {
+		t.Error("Group() on table <post_types> fail:", err)
+	}
+
+	_, err = _do.Scopes(func(dao gen.Dao) gen.Dao { return dao.Where(primaryKey.IsNotNull()) }).Find()
+	if err != nil {
+		t.Error("Scopes() on table <post_types> fail:", err)
+	}
+
+	_, _, err = _do.FindByPage(0, 1)
+	if err != nil {
+		t.Error("FindByPage() on table <post_types> fail:", err)
+	}
+
+	_, err = _do.ScanByPage(&models.PostType{}, 0, 1)
+	if err != nil {
+		t.Error("ScanByPage() on table <post_types> fail:", err)
+	}
+
+	_, err = _do.Attrs(primaryKey).Assign(primaryKey).FirstOrInit()
+	if err != nil {
+		t.Error("FirstOrInit() on table <post_types> fail:", err)
+	}
+
+	_, err = _do.Attrs(primaryKey).Assign(primaryKey).FirstOrCreate()
+	if err != nil {
+		t.Error("FirstOrCreate() on table <post_types> fail:", err)
+	}
+
+	var _a _another
+	var _aPK = field.NewString(_a.TableName(), "id")
+
+	err = _do.Join(&_a, primaryKey.EqCol(_aPK)).Scan(map[string]interface{}{})
+	if err != nil {
+		t.Error("Join() on table <post_types> fail:", err)
+	}
+
+	err = _do.LeftJoin(&_a, primaryKey.EqCol(_aPK)).Scan(map[string]interface{}{})
+	if err != nil {
+		t.Error("LeftJoin() on table <post_types> fail:", err)
+	}
+
+	_, err = _do.Not().Or().Clauses().Take()
+	if err != nil {
+		t.Error("Not/Or/Clauses on table <post_types> fail:", err)
+	}
+}

internal/dal/posts.gen.go

@@ -31,6 +31,7 @@ func newPost(db *gorm.DB, opts ...gen.DOOption) post {
 	_post.Deadline = field.NewInt64(tableName, "deadline")
 	_post.CreatedAt = field.NewInt64(tableName, "created_at")
 	_post.AuthorId = field.NewUint(tableName, "author_id")
+	_post.PostTypeId = field.NewUint(tableName, "post_type_id")
 	_post.Author = postBelongsToAuthor{
 		db: db.Session(&gorm.Session{}),
 
@@ -40,6 +41,18 @@ func newPost(db *gorm.DB, opts ...gen.DOOption) post {
 			Author struct {
 				field.RelationField
 			}
+			PostType struct {
+				field.RelationField
+			}
+			Comments struct {
+				field.RelationField
+				Author struct {
+					field.RelationField
+				}
+				Posts struct {
+					field.RelationField
+				}
+			}
 		}{
 			RelationField: field.NewRelation("Author.Posts", "models.Post"),
 			Author: struct {
@@ -47,7 +60,50 @@ func newPost(db *gorm.DB, opts ...gen.DOOption) post {
 			}{
 				RelationField: field.NewRelation("Author.Posts.Author", "models.Author"),
 			},
+			PostType: struct {
+				field.RelationField
+			}{
+				RelationField: field.NewRelation("Author.Posts.PostType", "models.PostType"),
+			},
+			Comments: struct {
+				field.RelationField
+				Author struct {
+					field.RelationField
+				}
+				Posts struct {
+					field.RelationField
+				}
+			}{
+				RelationField: field.NewRelation("Author.Posts.Comments", "models.Comment"),
+				Author: struct {
+					field.RelationField
+				}{
+					RelationField: field.NewRelation("Author.Posts.Comments.Author", "models.Author"),
+				},
+				Posts: struct {
+					field.RelationField
+				}{
+					RelationField: field.NewRelation("Author.Posts.Comments.Posts", "models.Post"),
+				},
+			},
 		},
+		Comments: struct {
+			field.RelationField
+		}{
+			RelationField: field.NewRelation("Author.Comments", "models.Comment"),
+		},
+	}
+
+	_post.PostType = postBelongsToPostType{
+		db: db.Session(&gorm.Session{}),
+
+		RelationField: field.NewRelation("PostType", "models.PostType"),
+	}
+
+	_post.Comments = postManyToManyComments{
+		db: db.Session(&gorm.Session{}),
+
+		RelationField: field.NewRelation("Comments", "models.Comment"),
 	}
 
 	_post.fillFieldMap()
@@ -58,13 +114,18 @@ func newPost(db *gorm.DB, opts ...gen.DOOption) post {
 type post struct {
 	postDo
 
-	ALL       field.Asterisk
-	Id        field.Uint
-	Text      field.String
-	Deadline  field.Int64
-	CreatedAt field.Int64
-	AuthorId  field.Uint
-	Author    postBelongsToAuthor
+	ALL        field.Asterisk
+	Id         field.Uint
+	Text       field.String
+	Deadline   field.Int64
+	CreatedAt  field.Int64
+	AuthorId   field.Uint
+	PostTypeId field.Uint
+	Author     postBelongsToAuthor
+
+	PostType postBelongsToPostType
+
+	Comments postManyToManyComments
 
 	fieldMap map[string]field.Expr
 }
@@ -86,6 +147,7 @@ func (p *post) updateTableName(table string) *post {
 	p.Deadline = field.NewInt64(table, "deadline")
 	p.CreatedAt = field.NewInt64(table, "created_at")
 	p.AuthorId = field.NewUint(table, "author_id")
+	p.PostTypeId = field.NewUint(table, "post_type_id")
 
 	p.fillFieldMap()
 
@@ -102,12 +164,13 @@ func (p *post) GetFieldByName(fieldName string) (field.OrderExpr, bool) {
 }
 
 func (p *post) fillFieldMap() {
-	p.fieldMap = make(map[string]field.Expr, 6)
+	p.fieldMap = make(map[string]field.Expr, 9)
 	p.fieldMap["id"] = p.Id
 	p.fieldMap["text"] = p.Text
 	p.fieldMap["deadline"] = p.Deadline
 	p.fieldMap["created_at"] = p.CreatedAt
 	p.fieldMap["author_id"] = p.AuthorId
+	p.fieldMap["post_type_id"] = p.PostTypeId
 
 }
 
@@ -131,6 +194,21 @@ type postBelongsToAuthor struct {
 		Author struct {
 			field.RelationField
 		}
+		PostType struct {
+			field.RelationField
+		}
+		Comments struct {
+			field.RelationField
+			Author struct {
+				field.RelationField
+			}
+			Posts struct {
+				field.RelationField
+			}
+		}
+	}
+	Comments struct {
+		field.RelationField
 	}
 }
 
@@ -199,6 +277,148 @@ func (a postBelongsToAuthorTx) Count() int64 {
 	return a.tx.Count()
 }
 
+type postBelongsToPostType struct {
+	db *gorm.DB
+
+	field.RelationField
+}
+
+func (a postBelongsToPostType) Where(conds ...field.Expr) *postBelongsToPostType {
+	if len(conds) == 0 {
+		return &a
+	}
+
+	exprs := make([]clause.Expression, 0, len(conds))
+	for _, cond := range conds {
+		exprs = append(exprs, cond.BeCond().(clause.Expression))
+	}
+	a.db = a.db.Clauses(clause.Where{Exprs: exprs})
+	return &a
+}
+
+func (a postBelongsToPostType) WithContext(ctx context.Context) *postBelongsToPostType {
+	a.db = a.db.WithContext(ctx)
+	return &a
+}
+
+func (a postBelongsToPostType) Session(session *gorm.Session) *postBelongsToPostType {
+	a.db = a.db.Session(session)
+	return &a
+}
+
+func (a postBelongsToPostType) Model(m *models.Post) *postBelongsToPostTypeTx {
+	return &postBelongsToPostTypeTx{a.db.Model(m).Association(a.Name())}
+}
+
+type postBelongsToPostTypeTx struct{ tx *gorm.Association }
+
+func (a postBelongsToPostTypeTx) Find() (result *models.PostType, err error) {
+	return result, a.tx.Find(&result)
+}
+
+func (a postBelongsToPostTypeTx) Append(values ...*models.PostType) (err error) {
+	targetValues := make([]interface{}, len(values))
+	for i, v := range values {
+		targetValues[i] = v
+	}
+	return a.tx.Append(targetValues...)
+}
+
+func (a postBelongsToPostTypeTx) Replace(values ...*models.PostType) (err error) {
+	targetValues := make([]interface{}, len(values))
+	for i, v := range values {
+		targetValues[i] = v
+	}
+	return a.tx.Replace(targetValues...)
+}
+
+func (a postBelongsToPostTypeTx) Delete(values ...*models.PostType) (err error) {
+	targetValues := make([]interface{}, len(values))
+	for i, v := range values {
+		targetValues[i] = v
+	}
+	return a.tx.Delete(targetValues...)
+}
+
+func (a postBelongsToPostTypeTx) Clear() error {
+	return a.tx.Clear()
+}
+
+func (a postBelongsToPostTypeTx) Count() int64 {
+	return a.tx.Count()
+}
+
+type postManyToManyComments struct {
+	db *gorm.DB
+
+	field.RelationField
+}
+
+func (a postManyToManyComments) Where(conds ...field.Expr) *postManyToManyComments {
+	if len(conds) == 0 {
+		return &a
+	}
+
+	exprs := make([]clause.Expression, 0, len(conds))
+	for _, cond := range conds {
+		exprs = append(exprs, cond.BeCond().(clause.Expression))
+	}
+	a.db = a.db.Clauses(clause.Where{Exprs: exprs})
+	return &a
+}
+
+func (a postManyToManyComments) WithContext(ctx context.Context) *postManyToManyComments {
+	a.db = a.db.WithContext(ctx)
+	return &a
+}
+
+func (a postManyToManyComments) Session(session *gorm.Session) *postManyToManyComments {
+	a.db = a.db.Session(session)
+	return &a
+}
+
+func (a postManyToManyComments) Model(m *models.Post) *postManyToManyCommentsTx {
+	return &postManyToManyCommentsTx{a.db.Model(m).Association(a.Name())}
+}
+
+type postManyToManyCommentsTx struct{ tx *gorm.Association }
+
+func (a postManyToManyCommentsTx) Find() (result []*models.Comment, err error) {
+	return result, a.tx.Find(&result)
+}
+
+func (a postManyToManyCommentsTx) Append(values ...*models.Comment) (err error) {
+	targetValues := make([]interface{}, len(values))
+	for i, v := range values {
+		targetValues[i] = v
+	}
+	return a.tx.Append(targetValues...)
+}
+
+func (a postManyToManyCommentsTx) Replace(values ...*models.Comment) (err error) {
+	targetValues := make([]interface{}, len(values))
+	for i, v := range values {
+		targetValues[i] = v
+	}
+	return a.tx.Replace(targetValues...)
+}
+
+func (a postManyToManyCommentsTx) Delete(values ...*models.Comment) (err error) {
+	targetValues := make([]interface{}, len(values))
+	for i, v := range values {
+		targetValues[i] = v
+	}
+	return a.tx.Delete(targetValues...)
+}
+
+func (a postManyToManyCommentsTx) Clear() error {
+	return a.tx.Clear()
+}
+
+func (a postManyToManyCommentsTx) Count() int64 {
+	return a.tx.Count()
+}
+
 type postDo struct{ gen.DO }
 
 type IPostDo interface {

internal/models/models.go

@@ -1,7 +1,7 @@
 package models
 
 var Entities = []any{
-	&Post{}, &Author{}, &PostType{},
+	&Post{}, &Author{}, &PostType{}, &Comment{},
 }
 
 type PostType struct {
@@ -10,18 +10,28 @@ type PostType struct {
 }
 
 type Post struct {
-	Id        uint     `gorm:"primaryKey" ui:"hidden"`
-	Text      string   `displayName:"Текст" ui:"label:Текст"`
-	Deadline  int64    `ui:"label:Дедлайн;datatype:datetime;"`
-	CreatedAt int64    `gorm:"autoCreateTime" ui:"readonly;datatype:datetime;"`
-	AuthorId  uint     `ui:"hidden" gorm:"foreignKey:Id;references:AuthorId;constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
-	Author    Author   `ui:"label:Автор; field:Name;"`
-	TypeId    uint     `ui:"hidden"`
-	PostType  PostType `ui:"label:Тип; field:Name;" gorm:"foreignKey:Id;references:TypeId;constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
+	Id         uint      `gorm:"primaryKey" ui:"hidden"`
+	Text       string    `ui:"label:Текст"`
+	Deadline   int64     `ui:"label:Дедлайн;datatype:datetime;"`
+	CreatedAt  int64     `gorm:"autoCreateTime" ui:"readonly;datatype:datetime;"`
+	AuthorId   uint      `ui:"hidden" gorm:"constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
+	Author     Author    `ui:"label:Автор; field:Name;"`
+	PostTypeId uint      `ui:"hidden"`
+	PostType   PostType  `ui:"label:Тип; field:Name;" gorm:"constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
+	Comments   []Comment `ui:"label:Комментарии; field:Text;" gorm:"many2many:comments_post;constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
 }
 
 type Author struct {
-	Id    uint   `gorm:"primaryKey" ui:"hidden"`
-	Name  string `ui:"label:Имя;"`
-	Posts []Post `ui:"label:Посты; field:Text;" gorm:"constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
+	Id       uint      `gorm:"primaryKey" ui:"hidden"`
+	Name     string    `ui:"label:Имя;"`
+	Posts    []Post    `ui:"label:Посты; field:Text;" gorm:"constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
+	Comments []Comment `ui:"label:Комментарии; field:Text;" gorm:"constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
+}
+
+type Comment struct {
+	Id       uint   `gorm:"primaryKey" ui:"hidden"`
+	Text     string `ui:"label:Текст;"`
+	AuthorId uint   `ui:"hidden"`
+	Author   Author `ui:"label:Автор; field:Name;" gorm:"foreignKey:Id;references:AuthorId;constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
+	Posts    []Post `ui:"label:Посты; field:Text;" gorm:"many2many:comments_post;constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
 }

internal/services/comment.go

@@ -0,0 +1,66 @@
+package services
+
+import (
+	"app/internal/dal"
+	"app/internal/database"
+	"app/internal/models"
+	"errors"
+
+	"gorm.io/gen/field"
+	"gorm.io/gorm"
+)
+
+type CommentService struct {
+}
+type Comment = models.Comment
+
+func (service *CommentService) Create(item Comment) (Comment, error) {
+	ReplaceEmptySlicesWithNil(&item)
+	err := dal.Comment.Preload(field.Associations).Create(&item)
+	if err != nil {
+		return item, err
+	}
+	err = AppendAssociations(database.GetInstance(), &item)
+	return item, err
+}
+
+func (service *CommentService) GetAll() ([]*Comment, error) {
+	var comments []*Comment
+	comments, err := dal.Comment.Preload(field.Associations).Find()
+	return comments, err
+}
+func (service *CommentService) GetById(id uint) (*Comment, error) {
+	item, err := dal.Comment.Preload(field.Associations).Where(dal.Comment.Id.Eq(id)).First()
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, nil
+		} else {
+			return nil, err
+		}
+	}
+	return item, nil
+}
+func (service *CommentService) Update(item Comment) (Comment, error) {
+	ReplaceEmptySlicesWithNil(&item)
+	err := dal.Comment.Preload(field.Associations).Save(&item)
+	if err != nil {
+		return item, err
+	}
+
+	err = UpdateAssociations(database.GetInstance(), &item)
+
+	if err != nil {
+		return item, err
+	}
+
+	return item, err
+}
+func (service *CommentService) Delete(id uint) error {
+	_, err := dal.Comment.Unscoped().Where(dal.Comment.Id.Eq(id)).Delete()
+	return err
+}
+
+func (service *CommentService) Count() (int64, error) {
+	amount, err := dal.Comment.Count()
+	return amount, err
+}

internal/services/default_data.go

@@ -7,8 +7,10 @@ import (
 )
 
 func InsertDefaultData() {
+	insertPostTypes()
 	insertAuthors()
 	insertPosts()
+	insertComments()
 }
 
 func InsertDefaultEntityData[T any](service Service[T], entities []T) {
@@ -23,22 +25,25 @@ func InsertDefaultEntityData[T any](service Service[T], entities []T) {
 func insertPosts() {
 	InsertDefaultEntityData(&PostService{}, []Post{
 		{
-			Id:       1,
-			Text:     "Жителям Кузбасса запретили болеть.",
-			Deadline: time.Now().Unix(),
-			AuthorId: 1,
+			Id:         1,
+			Text:       "Жителям Кузбасса запретили болеть.",
+			Deadline:   time.Now().Unix(),
+			AuthorId:   1,
+			PostTypeId: 1,
 		},
 		{
-			Id:       2,
-			Deadline: time.Now().Add(time.Hour * 24 * 5).Unix(),
-			Text:     "⚡️⚡️⚡️Дома будут летать.",
-			AuthorId: 2,
+			Id:         2,
+			Deadline:   time.Now().Add(time.Hour * 24 * 5).Unix(),
+			Text:       "⚡️⚡️⚡️Дома будут летать.",
+			AuthorId:   2,
+			PostTypeId: 2,
 		},
 		{
-			Id:       3,
-			Deadline: time.Now().Add(time.Hour * 24 * 6).Unix(),
-			Text:     "В Кузбассе начали строить дома выше, чтобы жители были ближе к богу и солнцу.",
-			AuthorId: 3,
+			Id:         3,
+			Deadline:   time.Now().Add(time.Hour * 24 * 6).Unix(),
+			Text:       "В Кузбассе начали строить дома выше, чтобы жители были ближе к богу и солнцу.",
+			AuthorId:   3,
+			PostTypeId: 3,
 		},
 	})
 }
@@ -59,3 +64,43 @@ func insertAuthors() {
 		},
 	})
 }
+
+func insertComments() {
+	InsertDefaultEntityData(&CommentService{}, []Comment{
+		{
+			Id:       1,
+			Text:     "Это просто замечательно!",
+			AuthorId: 1,
+			Posts:    []Post{{Id: 1}},
+		},
+		{
+			Id:       2,
+			Text:     "Я тоже думаю, что это замечательно!",
+			AuthorId: 2,
+			Posts:    []Post{{Id: 2}},
+		},
+		{
+			Id:       3,
+			Text:     "Я тоже думаю, что это замечательно!",
+			AuthorId: 3,
+			Posts:    []Post{{Id: 3}},
+		},
+	})
+}
+
+func insertPostTypes() {
+	InsertDefaultEntityData(&PostTypeService{}, []PostType{
+		{
+			Id:   1,
+			Name: "Общество",
+		},
+		{
+			Id:   2,
+			Name: "Политика",
+		},
+		{
+			Id:   3,
+			Name: "Экономика",
+		},
+	})
+}

internal/services/post.go

@@ -2,11 +2,13 @@ package services
 
 import (
 	"app/internal/dal"
+	"app/internal/database"
 	"app/internal/dialogs"
 	excel "app/internal/extras/excel"
 	"app/internal/models"
 	"errors"
 	"fmt"
+
 	"gorm.io/gen/field"
 	"gorm.io/gorm"
 )
@@ -15,7 +17,12 @@ type PostService struct{}
 type Post = models.Post
 
 func (service *PostService) Create(item Post) (Post, error) {
+	ReplaceEmptySlicesWithNil(&item)
 	err := dal.Post.Preload(field.Associations).Create(&item)
+	if err != nil {
+		return item, err
+	}
+	err = AppendAssociations(database.GetInstance(), &item)
 	return item, err
 }
 func (service *PostService) GetAll() ([]*Post, error) {
@@ -34,10 +41,20 @@ func (service *PostService) GetById(id uint) (*Post, error) {
 	}
 	return item, nil
 }
+
 func (service *PostService) Update(item Post) (Post, error) {
+	ReplaceEmptySlicesWithNil(&item)
 	err := dal.Post.Preload(field.Associations).Save(&item)
+	if err != nil {
+		return item, err
+	}
+	err = UpdateAssociations(database.GetInstance(), &item)
+	if err != nil {
+		return item, err
+	}
 	return item, err
 }
+
 func (service *PostService) Delete(id uint) error {
 	_, err := dal.Post.Unscoped().Where(dal.Post.Id.Eq(id)).Delete()
 	return err

internal/services/posttype.go

@@ -0,0 +1,61 @@
+package services
+
+import (
+	"app/internal/dal"
+	"app/internal/database"
+	"app/internal/models"
+	"errors"
+
+	"gorm.io/gen/field"
+	"gorm.io/gorm"
+)
+
+type PostTypeService struct {
+}
+type PostType = models.PostType
+
+func (service *PostTypeService) Create(item PostType) (PostType, error) {
+	ReplaceEmptySlicesWithNil(&item)
+	err := dal.PostType.Preload(field.Associations).Create(&item)
+	if err != nil {
+		return item, err
+	}
+	err = AppendAssociations(database.GetInstance(), &item)
+	return item, err
+}
+func (service *PostTypeService) GetAll() ([]*PostType, error) {
+	var posttypes []*PostType
+	posttypes, err := dal.PostType.Preload(field.Associations).Find()
+	return posttypes, err
+}
+func (service *PostTypeService) GetById(id uint) (*PostType, error) {
+	item, err := dal.PostType.Preload(field.Associations).Where(dal.PostType.Id.Eq(id)).First()
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, nil
+		} else {
+			return nil, err
+		}
+	}
+	return item, nil
+}
+func (service *PostTypeService) Update(item PostType) (PostType, error) {
+	ReplaceEmptySlicesWithNil(&item)
+	err := dal.PostType.Preload(field.Associations).Save(&item)
+	if err != nil {
+		return item, err
+	}
+	err = UpdateAssociations(database.GetInstance(), &item)
+	if err != nil {
+		return item, err
+	}
+	return item, err
+}
+func (service *PostTypeService) Delete(id uint) error {
+	_, err := dal.PostType.Unscoped().Where(dal.PostType.Id.Eq(id)).Delete()
+	return err
+}
+func (service *PostTypeService) Count() (int64, error) {
+	amount, err := dal.PostType.Count()
+	return amount, err
+}

internal/services/services.go

@@ -5,4 +5,6 @@ import "github.com/wailsapp/wails/v3/pkg/application"
 var ExportedServices = []application.Service{
 	application.NewService(&PostService{}),
 	application.NewService(&AuthorService{}),
+	application.NewService(&CommentService{}),
+	application.NewService(&PostTypeService{}),
 }