relForeignKeys = append(relForeignKeys, ref.ForeignKey.DBName)
				relForeignFields = append(relForeignFields, ref.ForeignKey)
				foreignFields = append(foreignFields, ref.PrimaryKey)
			} else if ref.PrimaryValue != "" {
				tx = tx.Where(clause.Eq{Column: ref.ForeignKey.DBName, Value: ref.PrimaryValue})
			} else {
				relForeignKeys = append(relForeignKeys, ref.PrimaryKey.DBName)

								rel = rel.FieldSchema.Relationships.Relations[name]
								relFields = append(relFields, rel.Field)
							}
							// latest name is raw dbname
							dbName := names[subNameCount-1]
							if field := rel.FieldSchema.LookUpField(dbName); field != nil && field.Readable {
								fields[idx] = field

								if len(joinFields) == 0 {
									joinFields = make([][]*schema.Field, len(columns))
								}

}

// ParseUniqueConstraints parse schema unique constraints
func (schema *Schema) ParseUniqueConstraints() map[string]UniqueConstraint {
	uniques := make(map[string]UniqueConstraint)
	for _, field := range schema.Fields {
		if field.Unique {
			name := schema.namer.UniqueName(schema.Table, field.DBName)
			uniques[name] = UniqueConstraint{Name: name, Field: field}
		}

	if len(defaultUpdatingColumns) > 0 || stmt.DB.FullSaveAssociations {
		onConflict.Columns = make([]clause.Column, 0, len(s.PrimaryFieldDBNames))
		for _, dbName := range s.PrimaryFieldDBNames {
			onConflict.Columns = append(onConflict.Columns, clause.Column{Name: dbName})
		}

		onConflict.UpdateAll = stmt.DB.FullSaveAssociations
		if !onConflict.UpdateAll {

	}

	fields := []*schema.Field{
		{Name: "ID", DBName: "id", BindNames: []string{"ID"}, DataType: schema.Uint, PrimaryKey: true, Size: 64, Creatable: true, Updatable: true, Readable: true, HasDefaultValue: true, AutoIncrement: true},
		{Name: "Name", DBName: "", BindNames: []string{"Name"}, DataType: "", Tag: `gorm:"-"`, Creatable: false, Updatable: false, Readable: false},

	}

	for _, ref := range rel.References {
		fkNil[ref.ForeignKey.DBName] = nil

		if ref.OwnPrimaryKey && ref.PrimaryKey != nil {
			ownerPKNames = append(ownerPKNames, ref.PrimaryKey.DBName)
			primaryColumns = append(primaryColumns, clause.Column{Name: ref.PrimaryKey.DBName})
			foreignColumns = append(foreignColumns, clause.Column{Name: ref.ForeignKey.DBName})
		} else if !ref.OwnPrimaryKey && ref.PrimaryKey != nil {

			if f.DBName != "" {
				if field, ok := s.FieldsByDBName[f.DBName]; !ok || parsedField != field {
					t.Errorf("schema %v failed to look up field with dbname %v", s, f.DBName)
				}
			}

			for _, name := range []string{f.DBName, f.Name} {
				if name != "" {
					if field := s.LookUpField(name); field == nil || (field.Name != name && field.DBName != name) {

                        },
                        "type": "object",
                        "required": ["subname"],
                        "title": "SubItem",
                    },
                    "SubItem-Output": {
                        "properties": {
                            "subname": {"type": "string", "title": "Subname"},
                            "sub_description": {

				relForeignKeys = append(relForeignKeys, ref.ForeignKey.DBName)
			} else if ref.PrimaryValue != "" {
				conds = append(conds, clause.Eq{
					Column: clause.Column{Table: rel.JoinTable.Table, Name: ref.ForeignKey.DBName},
					Value:  ref.PrimaryValue,
				})
			} else {
				conds = append(conds, clause.Eq{
					Column: clause.Column{Table: rel.JoinTable.Table, Name: ref.ForeignKey.DBName},

)

var DB *gorm.DB
var (
	mysqlDSN     = "gorm:gorm@tcp(localhost:9910)/gorm?charset=utf8&parseTime=True&loc=Local"
	postgresDSN  = "user=gorm password=gorm dbname=gorm host=localhost port=9920 sslmode=disable TimeZone=Asia/Shanghai"
	gaussdbDSN   = "user=gaussdb password=Gaussdb@123 dbname=gorm host=localhost port=9950 sslmode=disable TimeZone=Asia/Shanghai"
	sqlserverDSN = "sqlserver://sa:LoremIpsum86@localhost:9930?database=master"