Improve count() and countDocuments() mapping documentation and/or method availability [DATAMONGO-2192]

[spring-projects-issues]

Jeff opened DATAMONGO-2192 and commented

The mongodb documentation (not spring) outlines two different count calls - one is count() and the other is countDocuments()

After having a highly intermittent issue with an integration test receiving one less count than expected right after a write, I looked into potential problems with the count() query not being consistent, or fully accurate.

Here I discovered that count() can be inaccurate in certain situations, so in order to be 100% accurate, we'd have to do a countDocuments() call.

Issue is - the spring mongo data library only has a count() call. I cannot find any documentation about if the java .count() call maps to mongo's count() query or countDocuments() query.

 

Requests:

• Add documentation for what spring mongo data's repository.count() maps to query-wise in mongo - count() or countDocuments()

• if count() maps to count(), please add another method for repository.countDocuments()

 

Putting Label as "Spring" as I don't know if this is only a documentation issue or not, it could potentially result in added functionality

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Affects: 2.1.4 (Lovelace SR4)

Issue Links:

• DATAMONGO-2509 Polish documentation for 3.0 release

• DATAMONGO-2059 Replace usage of deprecated collection.count() with collection.countDocuments()