Frederick Cheung wrote:
>> Repair has_many :notes
>>
>> SELECT * FROM repairs
>> where exists
>> (select * from notes where repairs.id=notes.repair_id
>> and and notes.flagged)
I forgot my basic SQL! I think that's just
SELECT * FROM repairs r, notes n
WHERE r.id = n.repair_id
AND n.flagged = 1
right?
Repair.all( :include => :notes,
:conditions =>{ 'notes.flagged' => true } )
"Find all repairs with any flagged notes". And I thought AR would handle
distinct-ing that.
So how to do a sub-select if you indeed need one?
But my other answer lets you trivially walk back from the notes to the repairs:
r.notes.find_by_flagged(true).map(&:repair)
Warning: A map{} that rips another model like that can grow inefficient!
--
Phlip
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