}

		if len(joinFields) == 0 || len(joinFields[idx]) == 0 {
			db.AddError(field.Set(db.Statement.Context, reflectValue, values[idx]))
		} else { // joinFields count is larger than 2 when using join
			var isNilPtrValue bool
			var relValue reflect.Value
			// does not contain raw dbname
			nestedJoinSchemas := joinFields[idx][:len(joinFields[idx])-1]
			// current reflect value
			currentReflectValue := reflectValue

	}

	// Find Tools (polymorphic with custom type and id)
	var tools []Tools
	DB.Model(&users).Association("Tools").Find(&tools)

	if len(tools) != 2 {
		t.Errorf("tools count should be %v, but got %v", 2, len(tools))
	}

	// Append
	DB.Model(&users).Association("Toys").Append(
		&Toy{Name: "toy-slice-append-1"},

	} else if len(users2) != len(users) {
		t.Fatalf("Failed to load join users, got: %v, expect: %v", len(users2), len(users))
	}

	sort.Slice(users2, func(i, j int) bool {
		return users2[i].ID > users2[j].ID
	})

	sort.Slice(users, func(i, j int) bool {
		return users[i].ID > users[j].ID
	})

	for idx, user := range users {
		CheckUser(t, user, users2[idx])
	}
}

func TestJoinConds(t *testing.T) {

			Manager: &User{
				Name: "Alexis Manager",
				Tools: []Tools{
					{Name: "Alexis Tool 1"},
					{Name: "Alexis Tool 2"},
				},
			},
		},
		{
			Name: "TestMergeNestedPreloadWithNestedJoin-2",
			Manager: &User{
				Name: "Jinzhu Manager",
				Tools: []Tools{
					{Name: "Jinzhu Tool 1"},
					{Name: "Jinzhu Tool 2"},
				},
			},
		},
	}

	DB.Create(&users)

		}
	} else {
		onConflict.DoNothing = true
	}

	return
}

func saveAssociations(db *gorm.DB, rel *schema.Relationship, rValues reflect.Value, selectColumns map[string]bool, restricted bool, defaultUpdatingColumns []string) error {
	// stop save association loop
	if checkAssociationsSaved(db, rValues) {
		return nil
	}

	var (
		selects, omits []string

func (m Migrator) ReorderModels(values []interface{}, autoAdd bool) (results []interface{}) {
	type Dependency struct {
		*gorm.Statement
		Depends []*schema.Schema
	}

	var (
		modelNames, orderedModelNames []string
		orderedModelNamesMap          = map[string]bool{}
		parsedSchemas                 = map[*schema.Schema]bool{}
		valuesMap                     = map[string]Dependency{}

				}
			}

			specifiedRelationsName := make(map[string]interface{})
			for _, join := range db.Statement.Joins {
				if db.Statement.Schema != nil {
					var isRelations bool // is relations or raw sql
					var relations []*schema.Relationship
					relation, ok := db.Statement.Schema.Relationships.Relations[join.Name]
					if ok {
						isRelations = true

	}
	Scan(rows, tx, ScanInitialized)
	return tx.Error
}

// Connection uses a db connection to execute an arbitrary number of commands in fc. When finished, the connection is
// returned to the connection pool.
func (db *DB) Connection(fc func(tx *DB) error) (err error) {
	if db.Error != nil {
		return db.Error
	}

	tx := db.getInstance()
	sqlDB, err := tx.DB()
	if err != nil {
		return
	}

	if db.Error == nil && db.Statement.Schema != nil && !db.Statement.SkipHooks && (db.Statement.Schema.BeforeSave || db.Statement.Schema.BeforeCreate) {
		callMethod(db, func(value interface{}, tx *gorm.DB) (called bool) {
			if db.Statement.Schema.BeforeSave {
				if i, ok := value.(BeforeSaveInterface); ok {
					called = true
					db.AddError(i.BeforeSave(tx))
				}
			}

			if db.Statement.Schema.BeforeCreate {

	err := DB.Preload("Level2.Level3.Level4s").Find(&got).Error
	if err != nil {
		t.Error(err)
	}

	for _, level1 := range append(got, want...) {
		sort.Slice(level1.Level2.Level3.Level4s, func(i, j int) bool {
			return level1.Level2.Level3.Level4s[i].ID > level1.Level2.Level3.Level4s[j].ID
		})
	}

	if !reflect.DeepEqual(got, want) {
		t.Errorf("got %s; want %s", toJSONString(got), toJSONString(want))
	}