func checkSchemaRelation(t *testing.T, s *schema.Schema, relation Relation) {
	t.Run("CheckRelation/"+relation.Name, func(t *testing.T) {
		if r, ok := s.Relationships.Relations[relation.Name]; ok {
			if r.Name != relation.Name {
				t.Errorf("schema %v relation name expects %v, but got %v", s, r.Name, relation.Name)
			}

			if r.Type != relation.Type {
				t.Errorf("schema %v relation name expects %v, but got %v", s, r.Type, relation.Type)

			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
						relations = append(relations, relation)
					} else {
						// handle nested join like "Manager.Company"

	}
	names := make([]string, 0, len(embeddedRelations.Relations)+len(embeddedRelations.EmbeddedRelations))
	for _, relation := range embeddedRelations.Relations {
		// skip first struct name
		names = append(names, strings.Join(relation.Field.EmbeddedBindNames[1:], "."))
	}
	for _, relations := range embeddedRelations.EmbeddedRelations {
		names = append(names, embeddedValues(relations)...)
	}
	return names
}

						if reflect.Indirect(obj).Kind() != reflect.Struct {
							break
						}
						if _, zero := rel.Field.ValueOf(db.Statement.Context, obj); !zero { // check belongs to relation value
							rv := rel.Field.ReflectValueOf(db.Statement.Context, obj) // relation reflect value
							if !isPtr {
								rv = rv.Addr()
							}
							objs = append(objs, obj)
							elems = reflect.Append(elems, rv)

				},
			}},
			References: []Reference{{"ID", "User", "UserID", "user_friends", "", true}, {"ID", "User", "FriendID", "user_friends", "", false}},
		},
	}

	for _, relation := range relations {
		checkSchemaRelation(t, user, relation)
	}
}

func TestParseSchemaWithAdvancedDataType(t *testing.T) {
	user, err := schema.Parse(&AdvancedDataTypeUser{}, &sync.Map{}, schema.NamingStrategy{})
	if err != nil {

}

func (schema *Schema) setRelation(relation *Relationship) {
	// set non-embedded relation
	if rel := schema.Relationships.Relations[relation.Name]; rel != nil {
		if len(rel.Field.BindNames) > 1 {
			schema.Relationships.Relations[relation.Name] = relation
		}
	} else {
		schema.Relationships.Relations[relation.Name] = relation
	}

	// set embedded relation
	if len(relation.Field.EmbeddedBindNames) <= 1 {
		return

		return ns.TablePrefix + str
	}

	if ns.SingularTable {
		return ns.TablePrefix + ns.toDBName(str)
	}
	return ns.TablePrefix + inflection.Plural(ns.toDBName(str))
}

// RelationshipFKName generate fk name for relation
func (ns NamingStrategy) RelationshipFKName(rel Relationship) string {
	return ns.formatName("fk", rel.Schema.Table, ns.toDBName(rel.Name))
}

// CheckerName generate checker name

		"PostalAddress": {
			Relations: map[string]Relation{
				"Country": {
					Name: "Country", Type: schema.BelongsTo, Schema: "Org", FieldSchema: "Country",
					References: []Reference{
						{PrimaryKey: "ID", PrimarySchema: "Country", ForeignKey: "CountryID", ForeignSchema: "Org"},
					},
				},
			},
		},
		"VisitingAddress": {
			Relations: map[string]Relation{
				"Country": {

	err = stmt.Parse(joinTable)
	if err != nil {
		return err
	}
	joinSchema = stmt.Schema

	relation, ok := modelSchema.Relationships.Relations[field]
	isRelation := ok && relation.JoinTable != nil
	if !isRelation {
		return fmt.Errorf("failed to find relation: %s", field)
	}

	for _, ref := range relation.References {
		f := joinSchema.LookUpField(ref.ForeignKey.DBName)
		if f == nil {

	t := tag.Get("gorm")
	if strings.Contains(t, value) {
		return tag
	}
	return reflect.StructTag(fmt.Sprintf(`gorm:"%s;%s"`, value, t))
}

// GetRelationsValues get relations's values from a reflect value
func GetRelationsValues(ctx context.Context, reflectValue reflect.Value, rels []*Relationship) (reflectResults reflect.Value) {
	for _, rel := range rels {