Doctrine MongoDB query embedded documents

I开发者_高级运维 have top-level document User with embedded Keyword documents (User EmbedMany Keyword). Well i don't know how to get Keyword object from concrete User by Keyword's id I spent a lot of time trying to solve this but it still open problem for me. So i help someone here will help me. Thanks a lot.

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You can load only parent document from the mongodb. But there is $slice operator that can load parent document just with limited number of embedded documents.

On native mongodb language you can do it so:

db.users.find({_id: "UserId", "Keywords._id", "keywordId"},
               {Keywords:{$slice: 1}}) // first matched by id keyword

From doctrine you will receive user document with only one embedded keyword.

Hope this helps.