Rails - Oct 2008 - Finding out how many assets each user has

I''m sure this is a dumb question, but how could I find out how many
assets (or anything that belongs to a user) each user has? I can only
think of looping through each user and adding the asset size to an
array, but when you have thousands of users, that can take a lot of
time and memory. Thanks for the help.
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user.assets.size will do the trick. The query that''s issued will look
something like

SELECT count(*) AS count_all FROM `assets` WHERE (`assets`.user_id = 7524)

Regards,
Craig

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