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All the Perl that's Practical to Extract and Report

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  • When people talk about ORMs, I think they're generally looking at them the wrong way. The more I work with them, the more I think that trying to marry an class and a table is a terrible idea. I recently worked on a system where I could do something like this:

    $server->disable;

    That mapped to a table representing dedicated server, but that class had several other ORM classes it needed to interact with. That particular method hid tons of complexity behind it, including logging, deallocating IP addres

    • That sounds very much like how I think of DBIx::Class. Have you looked at it? I don’t think of DBIC as an ORM so much as I think of it as an OO API for SQL. Its basic unit is the result set – in other words, an OO wrapper around an SQL query. The main win for me is that I can accumulate conditions into queries (including composing result sets into one another) and let DBIC build the resulting SQL for me, instead of having to manually write template-ish SQL-generating logic for highly parametrisa

      • I've looked at DBIx::Class and it looks very nice, but I chose Rose::DB::Object. The project in question was an attempt to apply some discipline to a system where the code was rather typical of "legacy" systems. It was basically a bunch of CGIs and some of it already was a tad slow. One of our developers already had some performance issues with DBIx::Class on another project and I read some experiences others had with its performance. Since Rose is known for how incredibly fast it is (and I love how it separates the management of instances from the management of groups of instances), I felt that was a good way to go.

        In retrospect, Rose may not have been the best choice since transactions are not supported "out of the box" [mail-archive.com] because database handles are not shared. John Siracusa explains his reasons for this, but it has been enough of a stumbling block that the team using my code is pulling transaction support until they have more of the system "under control".