33 lines
1.2 KiB
Python
33 lines
1.2 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.template import loader
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from django.http import HttpResponse, Http404
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from django.db.models.manager import Manager
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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(klass, *args, **kwargs):
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if isinstance(klass, Manager):
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manager = klass
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klass = manager.model
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else:
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manager = klass._default_manager
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try:
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return manager.get(*args, **kwargs)
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except klass.DoesNotExist:
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raise Http404('No %s matches the given query.' % klass._meta.object_name)
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def get_list_or_404(klass, *args, **kwargs):
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if isinstance(klass, Manager):
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manager = klass
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else:
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manager = klass._default_manager
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obj_list = list(manager.filter(*args, **kwargs))
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if not obj_list:
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raise Http404('No %s matches the given query.' % manager.model._meta.object_name)
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return obj_list
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