我在两班之间有着许多ToMany关系,例如,客户和类别项目。 客户可以购买几个物品,一个物品可以由不同的客户购买。 我需要储存这方面的额外信息,例如购买该物品的当天。 我想知道,这通常如何仿照《人民军法》,使我无法确定如何在法典中表述这一点。 我是否必须设立一个新班,以模仿关系的所有特征,使其他班级之间形成许多“图曼”关系,还是这样做的更好方式?
增 编
所建议的方式是设立一个新的协会,以储存所需的属性,并向双方设立两个单人协会。
我猜测,你确实需要为关系建立一个新的阶层。
和你一样,正确的办法是建立一个具有额外特性的新类别。
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