On Dec 29, 2010, at 1:37 PM, A.M. wrote:
> Hello,
>
> I am attempting to upgrade a TurboGears project which was started (and is
> working) with TG 2.1b2 to 2.1. I created a new virtual environment in which
> to experiment, checked out my project into the environment, ran "python
> setup.py develop" and found that I needed to install repoze.what_pylons and
> genshi. After this, however, @expose('json') methods seem to get pumped
> through genshi which barfs on what it thinks is a template name. This same
> incarnation worked in 2.1b2, so I compared a quickstarted junk project and
> found that "base_config.renderers.append('json')" is added in app_cfg.py, but
> I still get the same backtrace on rendering.
>
> Thanks for any help!
Using winpdb, I found that I was importing my base controller (with the
@expose('json') decorators) before the app_cfg was fully loaded, so the json
engine was missing from the renderers. Because json is no longer a renderer by
default, it was missing from the list of available engines. The fix was to
delete an extraneous import in lib/__init__.py.
Cheers,
M
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