py4web - using session object in a template

[Jim S]

Hi

I'm trying to pass a session variable to layout.html but it tells me that session is not available:

NameError: name 'session' is not defined

I use this technique in web2py to send a page title to layout.html without having to pass it in the returned dict from the controller.

Obviously I'm being lazy using this technique.  Will this work with py4web or is it best for me to pass in explicitly in each controller?

-Jim

[Jim Steil]

I should re-state my problem.  With web2py I wasn't using session, but response.  I added a couple of attributes that always got added to the response object.  Not sure how to mimic that in py4web, or would I even want to?

-Jim

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[Massimo Di Pierro]

I would recommend you do something like this

@action('index')

@action.uses('index.html', session)

def index():

    ...

    return dict(session=dict(session))

This will pass a shallow copy of the session to the view. You will be free to read from the session in index.html but you should not write it.

On Friday, 17 January 2020 12:34:43 UTC-8, Jim S wrote:

I should re-state my problem.  With web2py I wasn't using session, but response.  I added a couple of attributes that always got added to the response object.  Not sure how to mimic that in py4web, or would I even want to?

-Jim

On Fri, Jan 17, 2020 at 11:16 AM Jim S <ato....@gmail.com> wrote:

Hi

I'm trying to pass a session variable to layout.html but it tells me that session is not available:

NameError: name 'session' is not defined

I use this technique in web2py to send a page title to layout.html without having to pass it in the returned dict from the controller.

Obviously I'm being lazy using this technique.  Will this work with py4web or is it best for me to pass in explicitly in each controller?

-Jim

--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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[Jim Steil]

Thanks Massimo.  I was hoping to avoid having to pass something to the view every time.  I'm lazy, right?  I'm assuming that this is the same if I used response instead of session.  In web2py you didn't have to pass response to the view, it was automatically available.

-Jim

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- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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[Massimo Di Pierro]

Lazy is good. You can turn it to your advantage with this:

import functools

def my_awesome_decorator(path=None, method=['GET','POST'], requires_login=False):

    def wrapper(func, path=path, method=method, requires_login=requires_login):
        path = path or func.__name__
    template = func.__name__+'.html'
        fixtures = [template, db, session, auth]
        if requires_login: fixtures.append(auth.user)
        @action(path, method=method)
        @action.uses(*fixtures)
        @functools.wraps(func)
        def tmp(*a, **b):
            d = func(*a, **b)
            if isinstance(d, dict):

                 d['session'] = dict(session.local.data)

                 if requires_login: d['user'] = auth.get_user()

            return d
        return tmp
    return wrapper

@my_awesome_decorator('test')
def index():
    return {}

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- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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