Set multiple fields as primary key creates composite primary key, for example:

1. type Product struct {
2. ID           string `gorm:"primaryKey"`
3. LanguageCode string `gorm:"primaryKey"`
4. Code         string
5. Name         string
6. }

Note integer PrioritizedPrimaryField enables AutoIncrement by default, to disable it, you need to turn off autoIncrement for the int fields:

1. type Product struct {
2. CategoryID uint64 `gorm:"primaryKey;autoIncrement:false"`
3. TypeID     uint64 `gorm:"primaryKey;autoIncrement:false"`
4. }