For an entity class, at least one member must have this attribute and should be mapped to the primary key or a unique key in the corresponding table or view.

对于实体类，必须至少有一个成员具有此特性，并应映射到相应表或视图中的主键或唯一键。

youdao

For an entity class, at least one member must have this attribute and should be mapped to the primary key or a unique key in the corresponding table or view.

对于实体类，必须至少有一个成员具有此特性，并应映射到相应表或视图中的主键或唯一键。

youdao