Added some handy shortcuts for django users.

mongoengine/django/shortcuts.py

@@ -0,0 +1,45 @@
+from django.http import Http404
+from mongoengine.queryset import QuerySet
+from mongoengine.base import BaseDocument
+
+def _get_queryset(cls):
+    """Inspired by django.shortcuts.*"""
+    if isinstance(cls, QuerySet):
+        return cls
+    else:
+        return cls.objects
+
+def get_document_or_404(cls, *args, **kwargs):
+    """
+    Uses get() to return an document, or raises a Http404 exception if the document
+    does not exist.
+
+    cls may be a Document or QuerySet object. All other passed
+    arguments and keyword arguments are used in the get() query.
+
+    Note: Like with get(), an MultipleObjectsReturned will be raised if more than one
+    object is found.
+
+    Inspired by django.shortcuts.*
+    """
+    queryset = _get_queryset(cls)
+    try:
+        return queryset.get(*args, **kwargs)
+    except queryset._document.DoesNotExist:
+        raise Http404('No %s matches the given query.' % queryset._document._class_name)
+
+def get_list_or_404(cls, *args, **kwargs):
+    """
+    Uses filter() to return a list of documents, or raise a Http404 exception if
+    the list is empty.
+
+    cls may be a Document or QuerySet object. All other passed
+    arguments and keyword arguments are used in the filter() query.
+
+    Inspired by django.shortcuts.*
+    """
+    queryset = _get_queryset(cls)
+    obj_list = list(queryset.filter(*args, **kwargs))
+    if not obj_list:
+        raise Http404('No %s matches the given query.' % queryset._document._class_name)
+    return obj_list