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Identifier and version properties are handled in a special way by Spring Data REST (ids are derived from and exposed via the URI, versions make it into the ETag header) and are not contained in the response representation. That requires handling PUT request having to explicitly exclude them from being wiped to null so that the server side values are still preserved.
= Spring Data REST The goal of the project is to provide a flexible and configurable mechanism for writing simple services that can be exposed over HTTP. The first exporter implemented is a JPA Repository exporter. This takes your JPA repositories and front-ends them with HTTP, allowing you full CRUD capability over your entities, to include managing associations. === Installation Installation instructions are in the docs: * http://docs.spring.io/spring-data/rest/docs/current/reference/html/[http://docs.spring.io/spring-data/rest/docs/current/reference/html/] === License The Spring Data REST is http://www.apache.org/licenses/LICENSE-2.0.html[Apache 2.0 licensed]. == Contributing to Spring Data Rest Here are some ways for you to get involved in the community: * Get involved with the Spring community on Stackoverflow. Please help out on the http://stackoverflow.com/questions/tagged/spring-data-rest[spring-data-rest] tag by responding to questions and joining the debate. * Create https://jira.spring.io/browse/DATAREST[JIRA] tickets for bugs and new features and comment and vote on the ones that you are interested in. * Github is for social coding: if you want to write code, we encourage contributions through pull requests from http://help.github.com/forking/[forks of this repository]. If you want to contribute code this way, please reference a JIRA ticket as well covering the specific issue you are addressing. * Watch for upcoming articles on Spring by http://spring.io/blog/[subscribing] to spring.io. Before we accept a non-trivial patch or pull request we will need you to sign the https://support.springsource.com/spring_committer_signup[contributor's agreement]. Signing the contributor's agreement does not grant anyone commit rights to the main repository, but it does mean that we can accept your contributions, and you will get an author credit if we do. Active contributors might be asked to join the core team, and given the ability to merge pull requests. === Note We disabled the github issues since we want to use https://jira.spring.io/browse/DATAREST[JIRA] as the only issue tracker. All open existing issues have been automatically imported into JIRA, so nothing was lost :)