65 lines
2.3 KiB
Python
65 lines
2.3 KiB
Python
# This module collects helper functions and classes that "span" multiple levels
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# of MVC. In other words, these functions/classes introduce controlled coupling
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# for convenience's sake.
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from django.core.exceptions import Http404, ObjectDoesNotExist
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from django.core.template import Context, loader
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from django.conf.settings import DEBUG, INTERNAL_IPS
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from django.utils.httpwrappers import HttpResponse
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def render_to_response(*args, **kwargs):
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return HttpResponse(loader.render_to_string(*args, **kwargs))
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load_and_render = render_to_response # For backwards compatibility.
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def get_object_or_404(mod, **kwargs):
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try:
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return mod.get_object(**kwargs)
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except ObjectDoesNotExist:
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raise Http404
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def get_list_or_404(mod, **kwargs):
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obj_list = mod.get_list(**kwargs)
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if not obj_list:
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raise Http404
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return obj_list
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class DjangoContext(Context):
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"""
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This subclass of template.Context automatically populates 'user' and
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'messages' in the context.
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"""
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def __init__(self, request, dict=None):
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Context.__init__(self, dict)
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self['user'] = request.user
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self['messages'] = request.user.get_and_delete_messages()
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self['perms'] = PermWrapper(request.user)
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from django.conf import settings
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self['LANGUAGES'] = settings.LANGUAGES
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if hasattr(request, 'LANGUAGE_CODE'):
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self['LANGUAGE_CODE'] = request.LANGUAGE_CODE
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else:
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self['LANGUAGE_CODE'] = settings.LANGUAGE_CODE
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if DEBUG and request.META.get('REMOTE_ADDR') in INTERNAL_IPS:
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self['debug'] = True
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from django.core import db
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self['sql_queries'] = db.db.queries
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# PermWrapper and PermLookupDict proxy the permissions system into objects that
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# the template system can understand.
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class PermLookupDict:
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def __init__(self, user, module_name):
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self.user, self.module_name = user, module_name
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def __repr__(self):
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return str(self.user.get_permission_list())
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def __getitem__(self, perm_name):
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return self.user.has_perm("%s.%s" % (self.module_name, perm_name))
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def __nonzero__(self):
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return self.user.has_module_perms(self.module_name)
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class PermWrapper:
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def __init__(self, user):
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self.user = user
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def __getitem__(self, module_name):
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return PermLookupDict(self.user, module_name)
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