在Scala 中，方括号表示参数化的类；在这里，参数是ID的类型和实际模型类的类型。

The square brackets denote a parameterized class in Scala, and in this case, it takes the type of the ID and the type of the actual model class.

youdao

在Scala 中，方括号表示参数化的类；在这里，参数是ID的类型和实际模型类的类型。

The square brackets denote a parameterized class in Scala, and in this case, it takes the type of the ID and the type of the actual model class.

youdao