package database import "gorm.io/gorm" type Manufacturer struct { gorm.Model Name string `gorm:"unique" validate:"required,custom_unique=Name"` } type Product struct { gorm.Model Name string Price uint ManufacturerID uint Manufacturer *Manufacturer `gorm:"foreignKey:ManufacturerID;references:ID"` } type User struct { gorm.Model Name string Email string Password string Products []*Product `gorm:"many2many:user_products;"` }