[Koha-bugs] [Bug 8309] New: Koha namespace organisation, first implementation

[bugzilla-daemon at bugs.koha-community.org]

http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=8309

          Priority: P1 - high
 Change sponsored?: ---
            Bug ID: 8309
          Assignee: paul.poulain at biblibre.com
           Summary: Koha namespace organisation, first implementation
          Severity: enhancement
    Classification: Unclassified
                OS: All
          Reporter: paul.poulain at biblibre.com
          Hardware: All
            Status: ASSIGNED
           Version: master
         Component: Architecture, internals, and plumbing
           Product: Koha

During KohaCon12 hackfest, some of us had a discussion about Koha namespace
organisation and content. The result was a wiki page:
http://wiki.koha-community.org/wiki/Koha_Namespace_RFC

I've investigated this organisation by writing some DBIx::Class & Moose
packages. The results are great, a lot of code can be removed, and the code is
safer. Note that the patches attached here are just a first draft, not
requesting sign-off, just comments !

My feedback of this first try:
 * defining the schema has been easy, thanks to DBIx::Class documentation.
Error messages are very clear and easy to understand for a newbie like me !
 * investigating a little bit more, there are many tools/tricks that will make
us save a lot of time/lines. Like caching (with DBIx::Class::Cursor::Cached),
paging (see
http://search.cpan.org/~arodland/DBIx-Class-0.08196/lib/DBIx/Class/Manual/Cookbook.pod#Paged_results,
not used in this 1st POC), doing JOIN or finding relations between datas, or
returning array of hashrefs (DBIx::Class::ResultClass::HashRefInflator)
 * cleaning categories.pl resulted in a code that is *much* smaller and
readable than the previous one (something like 100 lines removed)

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