Java Hibernate One To One
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Java Hibernate One To One
After reading it you should know how to use jpa annotations to ensure your entities are in a one to one relation. This is because we only need it on the owning side of the foreign key relationship. In such case, no foreign key is created in the primary table.
If we don't provide a name, hibernate will follow some rules to select a default one. Create hibernate.cfg.xml configuration file as explained in configuration chapter. Finally, note in the next entity that we won't use the @joincolumn annotation there.
In this example, one employee can have one address and one address belongs to one employee only.
When storing one e1 with a list of one e2 having a list of two e3 leads to the proper data in my database table. User classes to store and fetch the data there are two ways to perform one to one mapping in hibernate: We are taking the example of a student and subject marks. In such case, no foreign key is created in the primary table.
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