(should anyone else read this post...)
I think my confusion may have stemmed directly from the (v2.2)
documentation....
http://turbogears.readthedocs.org/en/rtfd2.2.2/main/RequestFlow.html
"to use a middleware before the TurboGears stack is processed you can wrap
the application returned by make_base_app function:
app = make_base_app(global_conf, full_stack=True, **app_conf)
app = MyMiddleware(app)
return app
To use a middleware that is TurboGears specific and wants to have the full
TurboGears stack available (session, authentication, database, etc...) you
can pass the middleware class to the make_base_app and it will be created
wrapping the application:
app = make_base_app(global_conf, full_stack=True,
wrap_app=MyMiddleware, **app_conf)
return app
>From the docs, I assumed that using the latter (ie by using wrap_app) my
custom middleware would be wrapped inside of the stack -- and hence have
the access.
Thank you very much for the clarification, Alessandro. I'll have a look to
see if `register_hook` can do the job.
Many thanks,
Rob
On Friday, 2 August 2013 10:48:12 UTC+1, Alessandro Molina wrote:
>
> On Fri, Aug 2, 2013 at 10:44 AM, Rob <[email protected]
> <javascript:>>wrote:
>
>>
>> I'm having trouble understanding how I can get access to the tg cache and
>> I'm getting a `TypeError No object (name: cache)` -- I'm tied to TG v2.2
>> for the time being...
>>
>>
> As stated in my previous email the TurboGears context is not available
> outside of the turbogears application.
> As your middleware is wrapping around the application is called before the
> application, and so the context is not available.
> The context includes the cache, so tg.cache is not available inside a
> middleware. WSGI middleware should not make the assumption that they are
> running inside TG as they are actually running before TG.
>
> If you really need to use tg.* objects you are limited to using
> controller_wrappers which are available also in 2.2. Look at
> http://turbogears.readthedocs.org/en/development/reference/reference.html#tg.configuration.AppConfig.register_hookif
> you want to see an example.
>
> Otherwise you are bound to environ['beaker.cache'] which is plain WSGI
> and doesn't require any TG feature.
>
>
>
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