Your tag hook function will be run once every time the page is *parsed &
rendered*, not every time the page is saved. It's common to see multiple
parses on save; for instance it may be parsed once for link table updates &
initial caching with generic settings, then parsed & rendered again for
your settings as you load the page up.
You'll also likely see it run during times such as:
* background update of the page due to update of a template
* view of an old revision from history
So if your extension assumes that just having a parser tag extension
function getting run means you're in a page save operation, you'll need to
update that assumption and work with the actual page save hooks.
-- brion
On Thu, Dec 5, 2013 at 11:32 AM, Daniel Barrett <d...@vistaprint.com> wrote:
> I've noticed that parser tag extensions render twice when an article is
> saved from the edit page.
> All I did was write a parser tag <foo> that runs error_log('foo').
> It prints once when I hit <foo/> on a page, but twice when saving the page
> from the wiki editor.
>
> Is there a way to prevent this double-running on save?
> Even way for the extension itself to detect it's on the first (or second)
> run and suppress itself?
>
> I have an extension that is heavyweight, making a SQL query to an external
> database,
> and I don't want to run twice.
>
> Thanks for any insights!
> DanB
>
>
>
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