}

	tableName := "null_string_model"

	DB.Migrator().DropTable(tableName)

	err := DB.Table(tableName).AutoMigrate(&NullModel{})
	AssertEqual(t, err, nil)

	// default null -> 'null'
	err = DB.Table(tableName).AutoMigrate(&NullStringModel{})
	AssertEqual(t, err, nil)

	columnType, err := findColumnType(tableName, "content")
	AssertEqual(t, err, nil)