making before_render events conditional ?

[Jonathan Vanasco]

I've got a subscriber to before_render that does some "tweaking" of objects and priming of an object cache for Mako/Jinja/etc templates.

The problem that I've run into – json calls to the api trigger this.

The following code works, just wondering if anyone has a better idea , that would let me escape not out of '/api' calls, but anything matching a json/jsonp or other render type.

def BeforeRender_prime(event):

    request = event.get("request") or threadlocal.get_current_request()

    if not request :

        log.debug( "BeforeRender_prime | NO_REQUEST" )

        return

    # only run once ; a fix for the pyramid_debugtoolbar multiple request

    if hasattr( request , 'BeforeRender_prime' ):

        return

    request.BeforeRender_prime = True

    # don't run on /api , which is all json

    if request.path_info[:5] == '/api/':

        return

    ... 

    ... expensive stuff ...

    ...

[Tres Seaver]

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On 05/17/2013 02:47 PM, Jonathan Vanasco wrote:
> I've got a subscriber to before_render that does some "tweaking" of
> objects and priming of an object cache for Mako/Jinja/etc templates.
>

> The problem that I've run into � json calls to the api trigger this.

>
> The following code works, just wondering if anyone has a better idea ,
> that would let me escape not out of '/api' calls, but anything
> matching a json/jsonp or other render type.
>
>
> def BeforeRender_prime(event): request = event.get("request") or
> threadlocal.get_current_request() if not request : log.debug(
> "BeforeRender_prime | NO_REQUEST" ) return # only run once ; a fix for
> the pyramid_debugtoolbar multiple request if hasattr( request ,
> 'BeforeRender_prime' ): return request.BeforeRender_prime = True #
> don't run on /api , which is all json if request.path_info[:5] ==
> '/api/': return

You should be able to filter on the 'renderer_name' for the event, e.g.:

if event.get('renderer_name') == 'json':
return


Tres.
- --
===================================================================
Tres Seaver +1 540-429-0999 tse...@palladion.com
Palladion Software "Excellence by Design" http://palladion.com
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[Jonathan Vanasco]

On Friday, May 17, 2013 3:04:18 PM UTC-4, Tres Seaver wrote:

  if event.get('renderer_name') == 'json':
      return

That works perfectly, thanks!