Object Relational Mappers: Difference between revisions

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== Java: Hibernate ==
== [[Hibernate|Java: Hibernate ]] ==


* If you specify a many-to-one or one-to-many mapping, be sure to use the same mapping as the Java collection interface. A Set mapping won't work with a List collection, for example.
* Hibernate is THE reference ORM, the most advanced solution available right now. It is extremely powerful although it takes quite some time to fully learn it (especially its model mappings, which can be complex since they allow almost any kind of mapping).
 
* In Hibernate, lazy loading is on by default for collections. This means the collections are fetched from the database only when they are used (never if they are not used). '''Warning:''' if the loading appears when the Hibernate session is already closed, it will ''''fail.'''

Latest revision as of 10:44, 19 May 2008

Java: Hibernate

  • Hibernate is THE reference ORM, the most advanced solution available right now. It is extremely powerful although it takes quite some time to fully learn it (especially its model mappings, which can be complex since they allow almost any kind of mapping).
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