Django - Storing results of query

I have a 'categories' model which I is used more than once on a page. Since I am obtaining all the categories at the start, I want to cut down on database queries by obtaining开发者_Python百科 the same data more than once.

Since the initial query is getting ALL the categories, is there a way to store this information in the model so that when I reference the data again later, I don't have to hit the database again?

Perhaps some kind of associative array or dict which stores the categories?

Any help would be appreciated.

Django querysets are lazy and cached, so the database is not hit till the queryset is accessed. You should also take a look at how queries are evaluated.

If you could post some code, we could help you figure out an optimal way to write queries.