t.Fatalf("wrong pet name")
	}
}

func TestJoinArgsWithDB(t *testing.T) {
	user := *GetUser("joins-args-db", Config{Pets: 2})
	DB.Save(&user)

	// test where
	var user1 User
	onQuery := DB.Where(&Pet{Name: "joins-args-db_pet_2"})
	if err := DB.Joins("NamedPet", onQuery).Where("users.name = ?", user.Name).First(&user1).Error; err != nil {

//	db.Distinct("name").Find(&results)
//	// Select distinct name/age pairs from users
//	db.Distinct("name", "age").Find(&results)
func (db *DB) Distinct(args ...interface{}) (tx *DB) {
	tx = db.getInstance()
	tx.Statement.Distinct = true
	if len(args) > 0 {
		tx = tx.Select(args[0], args[1:]...)
	}
	return
}

// Select specify fields that you want when querying, creating, updating
//

			}

			if len(args) > 0 && strings.Contains(s, "@") {
				// looks like a named query
				return []clause.Expression{clause.NamedExpr{SQL: s, Vars: args}}
			}

			if strings.Contains(strings.TrimSpace(s), " ") {
				// looks like a where condition
				return []clause.Expression{clause.Expr{SQL: s, Vars: args}}
			}

			if len(args) == 1 {

	preloadMap := map[string]map[string][]interface{}{}
	setPreloadMap := func(name, value string, args []interface{}) {
		if _, ok := preloadMap[name]; !ok {
			preloadMap[name] = map[string][]interface{}{}
		}
		if value != "" {
			preloadMap[name][value] = args
		}
	}

	for name, args := range preloads {
		preloadFields := strings.Split(name, ".")

		},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			actual := Org{}
			tx := DB.Where("id = ?", org.ID).Session(&gorm.Session{})
			for name, args := range test.preloads {
				tx = tx.Preload(name, args...)
			}
			if err := tx.Find(&actual).Error; err != nil {
				t.Errorf("failed to find org, got err: %v", err)
			}
			AssertEqual(t, actual, test.expect)
		})
	}

		}

		return tx
	}

	return db
}

// Expr returns clause.Expr, which can be used to pass SQL expression as params
func Expr(expr string, args ...interface{}) clause.Expr {
	return clause.Expr{SQL: expr, Vars: args}
}

// SetupJoinTable setup join table schema
func (db *DB) SetupJoinTable(model interface{}, field string, joinTable interface{}) error {
	var (