Question

I have a property (isFull) in a model whose value depends on other properties in that same model (counter).

So far I’ve been setting the property’s value myself whenever any of the properties it depends on change. I wrote a function isFull() that checks the counter and returns True or False. But I can’t use it with a query unless I fetch everything then iterate over the results checking if any of them isFull, which is BAD I know..

Is there a way to use my function with filter or gql ? or is there a different way of doing it? I know I can use a filter to check the counter but it goes more complex than that in some cases where I need to check dates, a counter and another flag all at the same time.

Answer 1

Use a ComputedProperty to store your computed value as a property in the datastore that you can filter on.