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google-code-export / objectify-appengine

Automatically exported from code.google.com/p/objectify-appengine
MIT License
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v4 fetchParentKeys equivalent #151

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
I notice that v4 doesn't have fetchParentKeys query method or equivalent.

Key only queries that extract the parent key are useful in appengine when 
implementing indexed searches. i.e. the index entities are the children, one 
does a keys only query on the children, and then extract the parent keys to 
identify the indexed parent.  It is a pattern that is documented in some google 
io appengine conference videos available on youtube.

It's easy for the client to implemented parent key extraction so not a big 
issue but was present in v3.

Original issue reported on code.google.com by jim.trai...@jptrainor.com on 2 Mar 2013 at 10:24

GoogleCodeExporter commented 9 years ago

Original comment by lhori...@gmail.com on 29 Mar 2013 at 7:52