Unique Index on DBRef [DATAMONGO-1297]

[spring-projects-issues]

Joseph Mason opened DATAMONGO-1297 and commented

I'm not able to uniquely index a property if it's a reference.

For example:

@DBRef
@Indexed(unique = true) // This does not work because of @DBRef
private User user1;

@Indexed(unique = true) // This works fine
private User user1;

I know that it's possible to unique index a DBRef, so I'm not sure why this doesn't work. It seems like a pretty important piece of functionality.

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Affects: 1.6.3 (Evans SR3), 1.7.2 (Fowler SR2), 1.8 GA (Gosling)

Referenced from: pull request #329

Backported to: 1.8.1 (Gosling SR1), 1.7.3 (Fowler SR3)

[spring-projects-issues]

Joseph Mason commented

After further testing, it looks like you can't put an index on a @DBRef object at all, not just a unique one.

[spring-projects-issues]

Joseph Mason commented

It seems like I'm not the only who is confused by this:

http://stackoverflow.com/questions/15818619/spring-data-mongodb-indexing-dbref

[spring-projects-issues]

Christoph Strobl commented

thanks Joseph Mason for bringing this up - we will have a look!

[spring-projects-issues]

Oliver Drotbohm commented

That's merged