}

	// Append
	languages1 := []Language{
		{Code: "language-many2many-append-1", Name: "language-many2many-append-1"},
	}
	languages2 := []Language{}
	languages3 := []Language{
		{Code: "language-many2many-append-3-1", Name: "language-many2many-append-3-1"},
		{Code: "language-many2many-append-3-2", Name: "language-many2many-append-3-2"},
	}
	DB.Create(&languages1)
	DB.Create(&languages3)

		schema.err = err
		return nil
	}

	if hasPolymorphicRelation(field.TagSettings) {
		schema.buildPolymorphicRelation(relation, field)
	} else if many2many := field.TagSettings["MANY2MANY"]; many2many != "" {
		schema.buildMany2ManyRelation(relation, field, many2many)
	} else if belongsTo := field.TagSettings["BELONGSTO"]; belongsTo != "" {
		schema.guessRelation(relation, field, guessBelongs)
	} else {

		Name: "Profiles", Type: schema.Many2Many, Schema: "User", FieldSchema: "Profile",
		JoinTable: JoinTable{Name: "user_profiles", Table: "user_profiles"},
		References: []Reference{
			{"Refer", "User", "UserReferID", "user_profiles", "", true},
			{"UserRefer", "Profile", "ProfileRefer", "user_profiles", "", false},
		},
	}, Relation{
		Name: "Profiles2", Type: schema.Many2Many, Schema: "User", FieldSchema: "Profile",

package tests_test

import (
	"testing"

	"gorm.io/gorm"
	. "gorm.io/gorm/utils/tests"
)

func TestUpdateMany2ManyAssociations(t *testing.T) {
	user := *GetUser("update-many2many", Config{})

	if err := DB.Create(&user).Error; err != nil {
		t.Fatalf("errors happened when create: %v", err)
	}

	user.Languages = []Language{{Code: "zh-CN", Name: "Chinese"}, {Code: "en", Name: "English"}}
	for _, lang := range user.Languages {

				} else {
					association.Error = tx.Where(clause.IN{Column: column, Values: values}).UpdateColumns(updateMap).Error
				}
			}
		case schema.Many2Many:
			var (
				primaryFields, relPrimaryFields     []*schema.Field
				joinPrimaryKeys, joinRelPrimaryKeys []string
				modelValue                          = reflect.New(rel.JoinTable.ModelType).Interface()

	fieldValues := make([]interface{}, len(relForeignFields))

	// clean up old values before preloading
	switch reflectValue.Kind() {
	case reflect.Struct:
		switch rel.Type {
		case schema.HasMany, schema.Many2Many:
			tx.AddError(rel.Field.Set(tx.Statement.Context, reflectValue, reflect.MakeSlice(rel.Field.IndirectFieldType, 0, 10).Interface()))
		default:

		t.Fatalf("Should find 3 tags")
	}

	var blog1 Blog
	DB.Preload("Tags").Find(&blog1)
	if !compareTags(blog1.Tags, []string{"tag1", "tag2", "tag3"}) {
		t.Fatalf("Preload many2many relations")
	}

	// Replace
	tag5 := &Tag{Locale: "ZH", Value: "tag5"}
	tag6 := &Tag{Locale: "ZH", Value: "tag6"}
	DB.Model(&blog).Association("Tags").Replace(tag5, tag6)
	var tags2 []Tag

		},
		{
			Name: "Team", Type: schema.HasMany, Schema: "User", FieldSchema: "User",
			References: []Reference{{"ID", "User", "ManagerID", "User", "", true}},
		},
		{
			Name: "Languages", Type: schema.Many2Many, Schema: "User", FieldSchema: "Language",
			JoinTable: JoinTable{Name: "UserSpeak", Table: "user_speaks", Fields: []schema.Field{
				{

					}

					saveAssociations(db, rel, elems, selectColumns, restricted, assignmentColumns)
				}
			}

			// Save Many2Many associations
			for _, rel := range db.Statement.Schema.Relationships.Many2Many {
				if v, ok := selectColumns[rel.Name]; (ok && !v) || (!ok && restricted) {
					continue
				}

				fieldType := rel.Field.IndirectFieldType.Elem()

						withoutConditions = true
						break
					}
				}

				if !withoutConditions && db.AddError(tx.Clauses(clause.Where{Exprs: queryConds}).Delete(modelValue).Error) != nil {
					return
				}
			case schema.Many2Many:
				var (
					queryConds     = make([]clause.Expression, 0, len(rel.References))
					foreignFields  = make([]*schema.Field, 0, len(rel.References))
					relForeignKeys = make([]string, 0, len(rel.References))