Custom SQL in Django

A link published by James Bennett on June 14, 2006. Tagged with custom-managers, django, orm and sql. No comments posted.

Malcolm has been building up to this for a couple of days, and it’s really worth reading the entire progression:

  1. First he posed a puzzle: find the best way to perform a certain operation in SQL.
  2. Then he offered a couple of solutions, one that’s quick and dirty and one that’s more elegant and efficient.
  3. Finally he explains how to use a custom manager to make this easy as pie in Django.

Custom managers are another of those great relatively-untapped features of Django that really make life a whole lot easier — I use a couple of them on this site to help save keystrokes on certain common database operations, for example. There’s a little bit of official documentation on them, but they’re a relatively new concept (having recently been merged in from a long-running development branch) and it’s great to see a concrete example of what they can do.

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