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Asked: 2026-05-15T01:23:44+00:00

I have a ManyToMany relationship between two classes, for instance class Customer and class

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I have a ManyToMany relationship between two classes, for instance class Customer and class Item. A customer can buy several items and an item can be bought by different customers. I need to store extra information in this relationship, for example the day when the item was bought. I wonder how is this usually modelled in JPA, cause I’m not sure how to express this in code. Do I have to create a new class to model all the attributes of the relationship and make a manyToMany relationship between the other classes or is a better way to do this?

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1 Answer

  1. Editorial Team

    The recommended way is to create a new association class to store the needed attributes, and two one-to-many associations to the two parties involved.

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