[support] hook_load() called several times from menu items

[Andy Fowlston]

Hi Marco,

I only skimmed your message, but it looks like you might be hitting a known issue:

http://drupal.org/node/1471554
(see also: http://drupal.stackexchange.com/q/38987/633)

The simple answer now seems to be to implement caching in your loader function.

Thanks,

Andy

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-----Original Message-----
From: support-bounces at drupal.org [mailto:support-bounces at drupal.org] On Behalf Of Marco Lechner - IMR
Sent: 09 January 2013 20:39
To: support at drupal.org
Subject: [support] hook_load() called several times from menu items

Hi,

I have a may be weird behaviour in the menu items of my module. To bring it down to simple code I foo-bar-ed it on  [1]

To describe it in a few words:
In my modules-ui I define some paths/routes like /foo, foo/list, foo/add, foo/%bar/delete, foo/%bar/edit ...

foo/list and foo/add are used to show a list if bar-objects or to open a form to add a new one using simple _form()-hooks.

when editing, deleting or cloning an existing bar object a callback function is used to create the form who takes the bar-object as input - provided by the %bar -> bar_load()-hook

As long as foo/%bar/... items are not defined in my menu()-hook
bar_load() is never called, but as soon as foo/%bar/... items are added to menu(), bar_load() is called several times (as often as menu-items with %bar exist) even when I request for foo/add or foo/list (which do not use %bar in any way.

Is this the intented behaviour? Why and which element calls the %bar bar_load()-hook even when my URl request does not fit the path-definition (foo/list instead of foo/%bar/edit -> I have no foo/%bar or foo/%bar/ defined)

May be I still do not understand Drupals architecture and Hook-system in a right way?

Marco

[1] http://pastebin.com/w0waVgX4
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