Ok, I have a many_to_many relationship between two tables (A, B)
implemented by a join table (J). J has two columns: a_id and b_id.
Currently, I use a query like this:
recs = A.find :all, :select => ‘A.*’,
:joins => ‘, B, J’,
:conditions => 'A.id = J.a_id AND J.b_id =
B.id AND B.somefield = somevalue ’
That works well, but is there a more Rails like way to do it?
Also, is there a more efficient way to do it? Notice in my RoR code,
I’m joining 3 tables together in a single SQL statement. Would it be
faster to select ids in an SQL call joining only 2 tables, then calling
A.find :all, ids?
ids_array = “SELECT J.a_id FROM J, B WHERE J.b_id = B.id AND
B.somefield = somevalue”
recs = A.find :all, ids_array
How do I efficiently execute that query and get an array of ids in
Thanks for the help.