Improve DBRef resolution for collections [DATAMONGO-1194]

[spring-projects-issues]

Oliver Drotbohm opened DATAMONGO-1194 and commented

Currently DBRef instances are resolved one by one, even for collection properties. This currently causes the DBRef resolution being done on a per-element basis which causes additional (un)necessary database lookups.

Maybe we can improve the collection handling a bit more so that the database lookup is only done once per property and the DBRef resolution can be batched

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Affects: 1.7 GA (Fowler)

Issue Links:

• DATAMONGO-1044 No AfterLoadEvent when loading DBRef

• DATAMONGO-1193 Prevent unnecessary database lookups when resolving DBRefs on 2.x driver

Referenced from: pull request #377