add variable to all contexts

[msoulier]

Hi,

Is there a way to add a variable automatically to every context
without specifying it in each view function?

I suppose I could write a decorator for this but I was wondering if
there's anything built-in.

Mike

[Sathit Scraft Programer]

My project, I keep all vars in one control dict named "_vars"

and first line of each view, I use 

%locals().update(_vars).

When chaining to other view within tpl, I use like this

%include subpage-ajax _vars=_vars

or like this...

%_include('subpage/'+_vars['subpage'],_stdout, _vars=_vars)

with rebase I use like this

%rebase layout-dynamic _vars=_vars

Replacement of extract all var at first line of view, you can select which vars you requied or optional to use in you view like this:

%_require_vars=['suburl']

%[locals().update({k:_vars[k]}) for k in _require_vars]

%_option_vars=['title','urlsubpage','urloptions','language']

%[locals().update({k:_vars.get(k)}) for k in _option_vars]

different is _require_vars will raise error of missing, but _option_vars not.

sathit

2011/6/27 msoulier <msou...@digitaltorque.ca>

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[Sathit S]

I'm not sure, you can try this 

def viewvars(**default) :

    def decorator(func):

        def wrapper() :

            v = {'environ':request.environ}

            v.update(default)

            v.update(func())

            return v

        return wrapper

    return decorator

@get('/')

@view('index')

@viewvars(foot='power by bottle')

def index():

   """Render the front page."""

   global _vars = _vars or dict()

   return dict(title='Home')

sathit

[Marcel Hellkamp]

It is undocumented, but you can assign values to SimpleTemplate.defaults

[Michael P. Soulier]

On 27/06/11 Marcel Hellkamp said:

> It is undocumented, but you can assign values to SimpleTemplate.defaults

Ah, we should document it then! :)

This is essentially what Django would call a context processor. They're quite
handy at preventing lots of cutting and pasting.

I did end up using a decorator, but SimpleTemplate.defaults sounds easier. Is
there a way using jinja2 templates?

Thanks,
Mike