[Cubicweb] StartupView and self._cw.add_onload method
Adrien Di Mascio
adrien.dimascio at logilab.fr
Fri Sep 9 08:57:04 CEST 2011
On 08/09/2011 15:47, Carlos Balderas wrote:
> I would like to use self._cw.add_onload() method in a StartupView but I
> error about unloadPageDate(),
There is no specific care to take before calling ``add_onload()``. The
``undefined function unloadPageData`` error is unrelated and is more
probably caused by an element of your page either requiring a tabindex,
a rql_varmaker. You shouldn't have to worry about that and this is most
probably a bug in CW.
To make things a bit clearer, when you're generating a page on the
server side, it gets associated a unique identifier. This identifier is
accessible by the ``pageid`` variable on the client side. When there's a
need to store session data specific to this page,
``req.set_page_data()`` is called on the server side during page
construction. Because this so called "page data" needs to be cleared
when the page is destroyed to avoid memory leaks, the ``unloadPageData``
is, as you said, defined in ``cubicweb.ajax.js`` and performs and ajax
call to remove its corresponding data from the session data.
That said, ``set_page_data()`` doesn't automaticlally adds
``cubicweb.ajax.js`` to the list of dependencies, this is probably the
cause of your error case and that's a CW bug.
Adrien Di Mascio - LOGILAB, Paris (France).
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