Hi,

According to http://guides.rubyonrails.org/active_record_querying.html, 
"first" does not use "ORDER BY ID" to bring the first record. Whereas 
"last" does.
I find this inconsistent. I can also say that this is buggy on MySQL. 
"....limit 1" does not always bring the record with the minimum id. I can 
link you to the following that
verifies my 
statement: http://forums.mysql.com/read.php?22,530328,530328#msg-530328

Do you think that you can change "first" to be consistent with "last" (that 
does the order by id desc)?

BR
Panayotis

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