On 9/13/11 1:04 PM, Frederick Cheung wrote:
On Sep 13, 5:51 pm, Jesse<[email protected]> wrote:
On 9/13/11 12:39 PM, Frederick Cheung wrote:
When comparing with nil you have to use IS NULL rather than the usual
comparison operator. where(:read_at => nil) should work though. How
are you using the scope?
I am making a call to it through
current_user.received_messages.unread.length which trips a MYSQL Error
|Mysql2::Error: You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near '==
NULL)' at line 1: SELECT `message_copies`.* FROM `message_copies` WHERE
(`message_copies`.recipient_id = 1) AND (read_at == NULL)|
is that using where("read_at == ?", nil ) ? That's just invalid
syntax, since the comparison operator operator is = in SQL. NULL is a
special case though - use IS NULL/IS NOT NULL to test for null values.
Thanks, that did the trick.
Fred
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