I get the same problem (UndefinedError: 'uri_for' is undefined) with my
coto-boilerplate website.
It happens on the first uri_for call in a template. I had canonical links
in the header which called uri_for but caused errors so I removed them, but
now the errors are happening in my navbar html.
uri_for is defined in basehandler.py like so:
def jinja2_factory(app):
j = jinja2.Jinja2(app)
j.environment.filters.update({
# Set filters.
# ...
})
j.environment.globals.update({
# Set global variables.
'csrf_token': generate_csrf_token,
'uri_for': webapp2.uri_for,
'getattr': getattr,
})
j.environment.tests.update({
# Set test.
# ...
})
return j
The error happens randomly, but pretty much kills the instance until I
restart.
Here is a stack trace from the error when uri_for was used in a canonical
link.
File "/base/data/home/runtimes/python27/python27_lib/
versions/third_party/webapp2-2.5.2/webapp2.py", line 1529, in __call__ rv =
self.router.dispatch(request, response)
File "/base/data/home/runtimes/python27/python27_lib/
versions/third_party/webapp2-2.5.2/webapp2.py", line 1278, in
default_dispatcher return route.handler_adapter(request, response)
File "/base/data/home/runtimes/python27/python27_lib/
versions/third_party/webapp2-2.5.2/webapp2.py", line 1102, in __call__
return handler.dispatch()
File "/base/data/home/apps/s~<site>/1-1.373006929445588669/
boilerplate/lib/basehandler.py", line 88, in dispatch
webapp2.RequestHandler.dispatch(self)
File "/base/data/home/runtimes/python27/python27_lib/
versions/third_party/webapp2-2.5.2/webapp2.py", line 572, in dispatch
return self.handle_exception(e, self.app.debug)
File "/base/data/home/runtimes/python27/python27_lib/
versions/third_party/webapp2-2.5.2/webapp2.py", line 570, in dispatch
return method(*args, **kwargs)
File
"/base/data/home/apps/s~<site>1/1-1.373006929445588669/boilerplate/handlers.py",
line 1526, in get return self.render_template('home.html', **params)
File "/base/data/home/apps/s~<site>/1-1.373006929445588669/
boilerplate/lib/basehandler.py", line 320, in render_template
self.response.write(self.jinja2.render_template(filename, **kwargs))
File "/base/data/home/runtimes/python27/python27_lib/
versions/third_party/webapp2-2.5.2/webapp2_extras/jinja2.py", line 158, in
render_template return self.environment.get_template(
_filename).render(**context)
File "/base/data/home/runtimes/python27/python27_lib/
versions/third_party/jinja2-2.6/jinja2/environment.py", line 894, in render
return self.environment.handle_exception(exc_info, True)
File "boilerplate/templates/home.html", line 1, in top-level template code
{% extends base_layout %}
File "boilerplate/templates/base.html", line 40, in top-level template code
File "boilerplate/templates/home.html", line 6, in block "canonical" {%
block canonical %}{{ uri_for("home") }}{% endblock %}
UndefinedError: 'uri_for' is undefined
On Tuesday, January 14, 2014 12:13:42 AM UTC-8, Roninio wrote:
>
>
> Vinny, Thanks for your answer. I have looked into the suggestion but can
> find difference with my code.
>
> I get the error only when i upload a new code to the app engine. If i
> restarted it manually it works.
>
> Error 500: 'uri_for' is undefined
>
>
> any ideas? Thanks
>
>
>
>
> On Tuesday, January 14, 2014 6:14:17 AM UTC+2, Vinny P wrote:
>>
>> On Sun, Jan 12, 2014 at 4:30 AM, Ronen Azachi <[email protected]> wrote:
>>
>>> having same problem. I am using the boilerplate "
>>> https://github.com/coto/gae-boilerplate";
>>> did you resolve this issue?
>>>
>>> On Monday, July 16, 2012 10:34:35 AM UTC+3, Thomas Marban wrote:
>>>>
>>>> Ever since including webapp2.uri_for in my webapp2_extras.jinja2 config
>>>> via
>>>>
>>>> 'globals': { 'uri_for' : webapp2.uri_for },
>>>>
>>>> I'm getting an undefined error every time I change a python file and
>>>> load the app for the first time. It won't come up on subsequent requests.
>>>> Also tried to inject it into globals via a Jinja2 factory but same result.
>>>> Any hints?
>>>>
>>>> UndefinedError: 'uri_for' is undefined
>>>>
>>>>
>>
>> The fix is to insert *uri_for* as a global in some manner. There's many
>> ways to do this, but you can try the strategy outlined here:
>> http://stackoverflow.com/questions/7081250/webapp2-jinja2-how-can-i-get-uri-for-working-in-jinja2-views
>>
>>
>>
>> -----------------
>> -Vinny P
>> Technology & Media Advisor
>> Chicago, IL
>>
>> App Engine Code Samples: http://www.learntogoogleit.com
>>
>>
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