MarkokraM schrieb:
> Hi,
>
> i thought this place best to ask this question as i'm developing my
> very first apps with TurboGears. I come from php background and couple
> of months ago i wanted to expand my programming language skills. I met
> and liked python because of its simple and elegant syntax. On php land
> there are a plethora of web frameworks which is cool and not so cool
> at the same. Almost everytime i have found myself developing my own
> framework for the specific app.
>
> With python its another thing. Since i dont have experience with that
> language, im not interested to create own framework. There seems to be
> just few web frameworks available so i have constructed tutorial app
> with Django, Pylons and TurboGears. At this moment i dont know which
> one to decide (or should i combine them somehow) and i need still more
> exercise apps created.
>
> Ok, lets that be the forewords and going to the subject and question
> itself.
>
> I want to create method to retrieve and save user settings depending
> on which storage or placeholder is available at the moment. On my app,
> user can be guest or member type (including all the different members
> as regular member, admin, moderator, superuser etc.). Now if user is
> guest there are three levels of settings inheritance:
>
> + Application
> + Cookie
> + Session
> (+ POST)
>
> with member there is one more level between application and cookie:
>
> + Application
> + Data (-base or file)
> + Cookie
> + Session
> (+ POST)
>
> Now if i want to retrieve variable for member i make a call:
> get_user_variable('variable_name') and it seeks through all the
> levels. Upper level overriders lower levels variables so first i get
> an initial value from Application, then seeking data layer, again
> cookie layer and finally session layer.
>
> When updating values i get data from POST request and move it down to
> data layer if user is member and to cookie (if available) or session
> layer if user is guest.
Something along these lines (untested):
class ConfigWrapper(object):
def __init__(self, config):
self._c = config
def __getattr__(self, name):
return self._c.get(name)
class CookieWrapper(object):
def __init__(self, cookie):
self._c = cookie
def __getattr__(self, name):
return self._c[name]
def __getattr__(self, name):
def get_user_variable(name):
for context in (cherrypy.request, cherrypy.session,
CookieWrapper(cherrypy.request.simple_cookie), identity.current.user,
ConfigWrapper(config)):
value = getattr(context, name, None)
if value is not None:
return value
Diez
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