I've been using Formencode throughout for both form validation and
config settings validation. Thanks for porting it to Pyramid and
Python 3 and dealing with changes within Python 3: I remember all of
those broke functionality until Formencode was patched.

On Tue, Apr 1, 2025 at 2:20 PM Jonathan Vanasco <[email protected]> wrote:
>
> i forgot to mention - if your app uses formencode for validation, I ported 
> the pylons validation to pyramid a long time ago and still actively use and 
> maintain it - https://github.com/jvanasco/pyramid_formencode_classic
>
>
> On Tuesday, April 1, 2025 at 1:14:08 PM UTC-4 Jonathan Vanasco wrote:
>>
>> Pyramid offers a few ways to implement the routes/controllers.
>>
>> The easiest when porting from Pylons is to use classes with @viewconfig, 
>> that can mimic the pylons handler classes.
>>
>> This is a good example of that approach in the regular pyramid docs: 
>> https://docs.pylonsproject.org/projects/pyramid_cookbook/en/latest/pylons/views.html
>>
>> Pretty much everything can be supported and migrated with not too much work, 
>> except for the globals. IIRC Pylons did some weird stuff with globals that 
>> wasn't necessarily threadsafe.  When moving to pyramid you can use events to 
>> define/translate "globals" into templates.  For the python code, you can 
>> also update code to not use globals and take a context object as the first 
>> argument.  The context object could be a request, or an object that wraps a 
>> request.
>>
>> In terms of templating - if there isn't a genshi package you could probably 
>> model one after pyramid_mako and port the pylons package over.  It might be 
>> much faster to do that, and then lightly adapt the templates, then reinvent 
>> everything.
>>
>>
>> On Tuesday, April 1, 2025 at 6:48:01 AM UTC-4 Milan Kelesi wrote:
>>>
>>> Hello,
>>>
>>> We are planning to migrate an existing project from Pylons 1.0.2 to Pyramid 
>>> 2.x.
>>> What would be the best approach to start?
>>> I understand we need to rewrite all the controllers.
>>> We are using Genshi templates and this does not seem to be supported in 
>>> Pyramid 2. What would be the easiest template engine to migrate to from 
>>> Genshi (Mako, Jinja2, Chameleon, ..)
>>> Is there an easy way to reuse the existing routes, globals, application 
>>> setup?
>>> I am currently a bit overwhelmed and not sure where to start.
>>> I would like to get a quick win and get one simple route/controller without 
>>> authentication to work under pyramid.
>>>
>>> Thanks for any advice.
>
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-- 
Mike Orr <[email protected]>

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