If you use decorators to views, it will greatly improve readability and extensibility of your code. I'm using a couple of decorators like this to reduce complexity and redundancy in my view codes.
wraps
from Python 2.5's standard library make the attributes (name, docstring, and etc) of the decorated function same to those of view_func
so that it could be easily recognized when you run ./manage.py show_urls
or debug.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | # In urls.py
urlpatterns = ('myproject.myapp.views',
url('^(?P<url_key>[a-z0-9]+)/view/$', 'my_view'),
url('^(?P<url_key>[a-z0-9]+)/write/$', 'my_write'),
...
)
# In views.py
# Requires Python 2.5 or higher
from functools import wraps
from django.shortcuts import get_object_or_404
from django.core.exceptions import PermissionDenied
def object_context(view_func):
@wraps(view_func)
def decorated(request, url_key, *args, **kwargs):
# Put your own discovery conditions here.
instance = get_object_or_404(MyModel, url_key=url_key, is_active=True)
return view_func(request, instance, *args, **kwargs)
return decorated
# For those who use granular pemission systems.
def object_perm_required(*perm_names):
def decorate(view_func):
@wraps(view_func)
@object_context
def decorated(request, instance, *args, **kwargs):
for perm_name in perm_names:
# Put your permission check routine here.
if request.user.has_row_perm(instance, perm_name):
break
else:
raise PermissionDenied()
return view_func(request, instance, *args, **kwargs)
return decorated
return decorate
@object_context
def my_view(request, instance):
# do something
@object_permission_required('can_write')
def my_write(request, instance):
# do something
|
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Comments
@david_bgk: That's great! Well, there should be some kind of global collective unconsciousness. :P
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