Issue 106 - googleappengine - [RFE] Cross App Queries

Issue 106:	[RFE] Cross App Queries	‹ Prev 94 of 1609 Next ›
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Status:	Acknowledged
Owner:	----
Type-Feature
Priority-Medium
Component-Datastore

Reported by fabricio, Apr 09, 2008

Reporting the request from the forum
http://groups.google.com/group/google-appengine/browse_thread/thread/12eb676e98a25293/f5cfaad4e0d79ac8

The issue description quoting Marzia:

"At this time, you can not directly query one application's datastore
from another application."

The request summary (and expected solution):

This feature request is about allowing cross app queries using the db APIs
only, similar to what other services (ie Ning Content Store) does.

The idea is to be able to query entities in the DataStore of other apps you
own from a different app you own. Ideally this cross app queries
implementation could also allow for queries on any application hosted on
GAE that have flagged it's entities as public (also following the Ning
approach).

Comment 1 by coolman.guron, Apr 10, 2008

yes this might be useful for my setup also
http://groups.google.co.in/group/google-appengine/browse_thread/thread/6b3d53b66754f813#

Comment 2 by ma...@google.com, Apr 10, 2008

(No comment was entered for this change.)

Labels: -Type-Defect Type-Feature

Comment 3 by jorge.vargas, Aug 01, 2008

This is a really nice feature I could use. Although it should require some sort of
auth because otherwise it could be exploited (for example have 10 app and keep your
service "free").


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Comment 4 by a.s@google.com, Sep 26, 2008

(No comment was entered for this change.)

Status: Acknowledged

Comment 5 by a.s@google.com, Oct 06, 2008

(No comment was entered for this change.)

Labels: Component-Datastore

Comment 7 by hawkett, Dec 30, 2008

I disagree with this feature request for the reasons stated in this discussion

http://groups.google.com/group/google-
appengine/browse_thread/thread/439d466d4e04b522/7847cf95195d53a7?hl=en

I think Marzia's full statement offers an appropriate alternative to using the db api's

'At this time, you can not directly query one application's datastore 
from another application.  You can expose datastore data in a feed, or 
other mechanism to be read by other applications.'

It may also satisfy some use cases to have multiple applications share a data store.

Comment 8 by tweetpage, Dec 30, 2008

Given the likely implementation of datastore access, namely an authenticated "open 
datastore" call by library or startup code, supporting the 106 functionality by 
exposing a protected version of said "open datastore" does not raise any (new) 
security issues and would be quite useful.