func TestMany2ManyWithMultiPrimaryKeys(t *testing.T) {
	type Tag struct {
		ID     uint   `gorm:"primary_key"`
		Locale string `gorm:"primary_key"`
		Value  string
	}

	type Blog struct {
		ID         uint   `gorm:"primary_key"`
		Locale     string `gorm:"primary_key"`
		Subject    string
		Body       string
		Tags       []Tag `gorm:"many2many:blog_tags;"`

		Name string
	}

	DB.Migrator().DropTable(&EmbeddedTag{})
	err := DB.Migrator().AutoMigrate(&EmbeddedTag{})
	AssertEqual(t, err, nil)

	t1 := EmbeddedTag{Name: "embedded_tag"}
	err = DB.Save(&t1).Error
	AssertEqual(t, err, nil)
	if t1.Tag1.Id == 0 {
		t.Errorf("embedded struct's primary field should be rewrited")
	}

	t.Run("CheckField/"+f.Name, func(t *testing.T) {
		if fc != nil {
			fc(f)
		}

		if f.TagSettings == nil {
			if f.Tag != "" {
				f.TagSettings = schema.ParseTagSetting(f.Tag.Get("gorm"), ";")
			} else {
				f.TagSettings = map[string]string{}
			}
		}

		parsedField, ok := s.FieldsByDBName[f.DBName]
		if !ok {
			parsedField, ok = s.FieldsByName[f.Name]

	// By default, ColumnType's Unique is not affected by UniqueIndex, so we don't care about UniqueIndex.
	return m.RunWithValue(value, func(stmt *gorm.Statement) error {
		// We're currently only receiving boolean values on `Unique` tag,
		// so the UniqueConstraint name is fixed
		constraint := m.DB.NamingStrategy.UniqueName(stmt.Table, field.DBName)
		if unique && !field.Unique {
			return m.DB.Migrator().DropConstraint(value, constraint)
		}

	for _, value := range strings.Split(field.Tag.Get("gorm"), ";") {
		if value != "" {
			v := strings.Split(value, ":")
			k := strings.TrimSpace(strings.ToUpper(v[0]))
			if k == "INDEX" || k == "UNIQUEINDEX" {
				var (
					name       string
					tag        = strings.Join(v[1:], ":")
					idx        = strings.Index(tag, ",")
					tagSetting = strings.Join(strings.Split(tag, ",")[1:], ",")

		}
	}
	return
}

func removeSettingFromTag(tag reflect.StructTag, names ...string) reflect.StructTag {
	for _, name := range names {
		tag = reflect.StructTag(regexp.MustCompile(`(?i)(gorm:.*?)(`+name+`(:.*?)?)(;|("))`).ReplaceAllString(string(tag), "${1}${5}"))
	}
	return tag
}

func appendSettingFromTag(tag reflect.StructTag, value string) reflect.StructTag {
	t := tag.Get("gorm")
	if strings.Contains(t, value) {
		return tag

	Locale     string `gorm:"primary_key"`
	Subject    string
	Body       string
	Tags       []Tag `gorm:"many2many:blog_tags;"`
	SharedTags []Tag `gorm:"many2many:shared_blog_tags;ForeignKey:id;References:id"`
	LocaleTags []Tag `gorm:"many2many:locale_blog_tags;ForeignKey:id,locale;References:id"`
}

type Tag struct {
	ID     uint   `gorm:"primary_key"`
	Locale string `gorm:"primary_key"`
	Value  string

		{Name: "Name", DBName: "", BindNames: []string{"Name"}, DataType: "", Tag: `gorm:"-"`, Creatable: false, Updatable: false, Readable: false},
		{Name: "Name2", DBName: "name2", BindNames: []string{"Name2"}, DataType: schema.String, Tag: `gorm:"->"`, Creatable: false, Updatable: false, Readable: true},
		{Name: "Name3", DBName: "name3", BindNames: []string{"Name3"}, DataType: schema.String, Tag: `gorm:"<-"`, Creatable: true, Updatable: true, Readable: true},

				{
					Name: "UserID", DBName: "user_id", BindNames: []string{"UserID"}, DataType: schema.Uint,
					Tag: `gorm:"primarykey"`, Creatable: true, Updatable: true, Readable: true, PrimaryKey: true, Size: 64,
				},
				{
					Name: "LanguageCode", DBName: "language_code", BindNames: []string{"LanguageCode"}, DataType: schema.String,
					Tag: `gorm:"primarykey"`, Creatable: true, Updatable: true, Readable: true, PrimaryKey: true,
				},
			}},

				Type:    relField.StructField.Type,
				Tag: removeSettingFromTag(appendSettingFromTag(relField.StructField.Tag, "primaryKey"),
					"column", "autoincrement", "index", "unique", "uniqueindex"),
			})
		}
	}

	joinTableFields = append(joinTableFields, reflect.StructField{
		Name: strings.Title(schema.Name) + field.Name,
		Type: schema.ModelType,
		Tag:  `gorm:"-"`,
	})