Why is Rails making 2 SELECT queries when updating user info

Rails
1

Hi,

My User model has been generated using the restful_authentication
generator. When I submit data to the update action of the
users_controllers, I see that Rails makes the following queries which
are unnecessary:

BEGIN
SELECT * FROM users WHERE (LOWER(users.login) = ‘fernando’ AND
users.id <> 2) LIMIT 1
SELECT * FROM users WHERE (LOWER(users.email) = ‘fernando’ AND
users.id <> 2) LIMIT 1
UPDATE ‘users’ …
COMMIT

Is there something I have made that creates these two SELECT queries? I
really don’t understand where it is coming from.

2

On 25 Apr 2008, at 20:48, Fernando P. wrote:

users.id <> 2) LIMIT 1
SELECT * FROM users WHERE (LOWER(users.email) = ‘fernando’ AND
users.id <> 2) LIMIT 1
UPDATE ‘users’ …
COMMIT

Have you got some validations that might cause this ?(in particular
validates_uniqueness_of)

Fred

3

That’s exactly the case!

I tested by removing the validation, and the 2 SELECT didn’t happen.
Thank your very much for your assitance.