package tests import ( "database/sql" "time" "gorm.io/gorm" ) // User has one `Account` (has one), many `Pets` (has many) and `Toys` (has many - polymorphic) // He works in a Company (belongs to), he has a Manager (belongs to - single-table), and also managed a Team (has many - single-table) // He speaks many languages (many to many) and has many friends (many to many - single-table) // His pet also has one Toy (has one - polymorphic) type User struct { gorm.Model Name string Age uint Birthday *time.Time Account Account Pets []*Pet Toys []Toy `gorm:"polymorphic:Owner"` CompanyID *int Company Company ManagerID *uint Manager *User Team []User `gorm:"foreignkey:ManagerID"` Languages []Language `gorm:"many2many:UserSpeak"` Friends []*User `gorm:"many2many:user_friends"` Active bool } type Account struct { gorm.Model UserID sql.NullInt64 Number string } type Pet struct { gorm.Model UserID *uint Name string Toy Toy `gorm:"polymorphic:Owner;"` } type Toy struct { gorm.Model Name string OwnerID string OwnerType string } type Company struct { ID int Name string } type Language struct { Code string `gorm:"primarykey"` Name string }