feat: null_safety test

models/testdata.go

@@ -1,26 +0,0 @@
-package models
-
-type Order struct {
-	Id            uint `gorm:"primaryKey"`
-	Status        string
-	ProductTypeId uint
-	ProductType   ProductType
-	ProductAmount uint
-	Description   string
-	CustomerId    uint `gorm:"null;foreignKey:CustomerId;"`
-	Customer      Customer
-	CreatedAt     int64 `gorm:"autoCreateTime"`
-	DeadlineDate  int64
-}
-
-type ProductType struct {
-	Id   uint `gorm:"primaryKey"`
-	Name string
-}
-
-type Customer struct {
-	Id      uint `gorm:"primaryKey"`
-	Title   string
-	Contact string
-	Orders  []Order `gorm:"foreignKey:CustomerId"`
-}