if DB.Save(&p2).Error == nil {
		t.Fatalf("An error from before save callbacks happened when update with invalid value")
	}

	p3 := Product{Code: "dont_delete", Price: 100}
	DB.Save(&p3)
	if DB.Delete(&p3).Error == nil {
		t.Fatalf("An error from before delete callbacks happened when delete")
	}

	if DB.Where("Code = ?", "dont_delete").First(&p3).Error != nil {
		t.Fatalf("An error from before delete callbacks happened")
	}

//
// Attrs only adds attributes if the record is not found.
//
//	// assign an email if the record is not found
//	db.Where(User{Name: "non_existing"}).Attrs(User{Email: "******@****.***"}).FirstOrInit(&user)
//	// user -> User{Name: "non_existing", Email: "******@****.***"}
//
//	// assign an email if the record is not found, otherwise ignore provided email

// Each conds must be a struct or map.
//
// Using FirstOrCreate in conjunction with Assign will result in an update to the database even if the record exists.
//
//	// assign an email if the record is not found
//	result := db.Where(User{Name: "non_existing"}).Attrs(User{Email: "******@****.***"}).FirstOrCreate(&user)

		t.Fatalf("Failed to auto migrate: error: %v", err)
	}

	// make new session to set custom logger tracer
	session := DB.Session(&gorm.Session{Logger: tracer})

	// The second AutoMigrate to catch an error
	if err := session.AutoMigrate(&MigrateInt{}); err != nil {
		t.Fatalf("Failed to auto migrate: error: %v", err)
	}
}

func TestAutoMigrateSelfReferential(t *testing.T) {
	type MigratePerson struct {

		Where("id = ?", elem.Id).
		Updates(&ElementWithIgnoredField{Value: "bar", IgnoredField: 100})

	var result ElementWithIgnoredField
	if err := DB.First(&result, elem.Id).Error; err != nil {
		t.Errorf("error getting an element from database: %s", err.Error())
	}

	if result.IgnoredField != 0 {
		t.Errorf("element's ignored field should not be updated")
	}
}

func TestUpdateFromSubQuery(t *testing.T) {