Google App Engine indexes

Sometimes you need to add an index to you app. Even though most of the times is done atomticaly it is not rare. To manage indexes in app engine is straight forward, but first you need to understand a few basic points.

Every query need an index to run. And the index is ordered. The development server does this for you in most of the cases. It does that primarily because there are a group of automatic indexes. On top of that if you run a query it is checking for the index and if there is not an index to serve the query it is adding it.

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