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POOn the google app engine, why do updates not reflect in a transaction?
 

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  1. POOn the google app engine, why do updates not reflect in a transaction?
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    <p>I store groups of entities in the google app engine Data Store with the same ancestor/parent/entityGroup. This is so that the entities can be updated in one atomic datastore transaction.</p> <p>The problem is as follows:</p> <ol> <li>I start a db transaction</li> <li>I update entityX by setting entityX.flag = True</li> <li>I save entityX</li> <li>I query for entity where flag == True. BUT, here is the problem. This query does NOT return any results. It should have returned entityX, but it did not.</li> </ol> <p>When I remove the transaction, my code works perfectly, so it must be the transaction that is causing this strange behavior.</p> <p>Should updates to entities in the entity group not be visible elsewhere in the same transaction?</p> <p>PS: I am using Python. And GAE tells me I can't use nested transactions :(</p>
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