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Re: The (Too-)Well Hidden Magic of "DBIx::Class"

by jasonk (Parson)
on Feb 04, 2009 at 15:29 UTC ( #741316=note: print w/ replies, xml ) Need Help??

in reply to The (Too-)Well Hidden Magic of "DBIx::Class"

To answer some of your questions in kind of random order:

When declaring a relationship, if you know you want it to use an inner join, you can specify that in the relationship declaration:

__PACKAGE__->has_many( 'foos', 'MySchema::Foo', 'bar_id', { join_type => 'INNER' } );

To find out exactly what queries are being issued as a result of your code, set the environment variable DBIC_TRACE to a true value, and the generated queries will get dumped to stderr.

As for whether it's efficient or not, that depends a lot on the application, the data, and the types of queries you are doing, as well as how you define efficient. I'm sure that I could get queries that ran a little bit faster by building them by hand, but the time that it takes to do so wouldn't offset the time that DBIx::Class saves me, so while the queries themselves might be slightly less efficient, I am much more efficient with it than without.
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