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POCan I specify the order of how changes happen in an single App Engine transaction ? Is it equal to the order of the list of arguments?
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2010-03-14T12:50:36.190
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2010-03-15T19:52:45.633
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<p>If I passed a list of key ids as an argument in a transaction, would the change associated with the first key in the list happen first? And if not, how do I specify the order that I want the changes to happen in?</p> <p>As a concrete example, consider this code below from <a href="http://code.google.com/appengine/docs/python/datastore/transactions.html" rel="nofollow noreferrer">Google Docs Transactions</a>--would changes to the first item in acc.key() happen first?</p> <pre><code>class Accumulator(db.Model): counter = db.IntegerProperty() Docshttp://code.google.com/appengine/docs/python/datastore/transactions.html: def increment_counter(key, amount): obj = db.get(key) obj.counter += amount obj.put() q = db.GqlQuery("SELECT * FROM Accumulator") acc = q.get() db.run_in_transaction(increment_counter, acc.key(), 5) </code></pre>
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Can I specify the order of how changes happen in an single App Engine transaction ? Is it equal to the order of the list of arguments?
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