同一实体上的多对多关系，而无需其他联接表列

Question

I have an entity that has many-to-many association to itself.

If I needed some additional properties (like asked here ) the answer would be to use a new intermediate entity. But without them is it bad practice to use direct many-to-many association to the entity itself?

Answer 1

使用映射表是N对N关系的最佳方法，而无需在映射表中自行创建新列。

Answer 2

Aleksey,

If you have additional columns, you need a new intermediate Entity .

But without them is it bad practice to use direct many-to-many association to the entity itself ?

No, you can if you want since you do not have additional columns on The joined Table