Where can I find out about versioned URL's in Google App Engine?

Question

Versioned URL's are mentioned near the bottom of this section with very little explanation:

http://code.google.com/appengine/docs/python/config/appconfig.html#Secure_URLs

I want to find out more about versioned URL's, but I can't seem to find any more information. My main concern has to do with disabling them. I can see how this could be useful (e.g. for debugging or postmortem), but I don't want users to be able to run previous versions of my app! Those versions might even end up corrupting data, because of data model evolution.

Is there any way to configure versioned URL's in Google App Engine?

Answer 1

On the deployment control page for your application, you can delete prior versions under Administration ➤ Versions if you want.

The idea behind simultaneously running deployment of old versions is to not break things for earlier users who depend on old versions. By choosing the default deployment, you make users of your_app.appspot.com not care. If you want to prevent someone from running deployment 1.your_app.appspot when version 2 is up, just delete deployment 1.