[Koha-bugs] [Bug 24435] Add Koha::Biblio->items_count

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

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=24435

--- Comment #2 from Tomás Cohen Arazi <tomascohen at gmail.com> ---
Created attachment 97463
  -->
https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=97463&action=edit
Bug 24435: Add Koha::Biblio->items_count

This patch introduces a handy shortcut to get the items count for a
biblio. So instead of calling:

  $count = $biblio->items->count;
you can call:
  $count = $biblio->items_count;

The use case for this, is when we want to embed information on objects
to be sent as API responses. In that case, calling ->items->count needs
to be done manually on the controller script, with interesting added
complexity. With this kind of method, we can just require it to be
embedded automagically by calling the following on the API:

   $biblio->to_api({ embed => { items_count => {} } });

If there are several nested layers of objects, doing manually can get
really tricky and error prone.

To test:
1. Apply this patches
2. Run:
   $ kshell
  k$ prove t/db_dependent/Koha/Biblio.t
=> SUCCESS: Tests pass!
3. Sign off :-D

Signed-off-by: Tomas Cohen Arazi <tomascohen at theke.io>

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