Finishing touches to where implementation - thanks to dcrosta

Refs #242

mongoengine/fields.py

@@ -620,7 +620,7 @@ class GenericReferenceField(BaseField):
     """A reference to *any* :class:`~mongoengine.document.Document` subclass
     that will be automatically dereferenced on access (lazily).
 
-    note:  Any documents used as a generic reference must be registered in the
+    ..note ::  Any documents used as a generic reference must be registered in the
     document registry.  Importing the model will automatically register it.
 
     .. versionadded:: 0.3
@@ -925,7 +925,7 @@ class SequenceField(IntField):
         return value
 
     def __set__(self, instance, value):
-        
+
         if value is None and instance._initialised:
             value = self.generate_new_value()
 

mongoengine/queryset.py

@@ -1401,6 +1401,10 @@ class QuerySet(object):
         """Filter ``QuerySet`` results with a ``$where`` clause (a Javascript
         expression). Performs automatic field name substitution like
         :meth:`mongoengine.queryset.Queryset.exec_js`.
+
+        .. note:: When using this mode of query, the database will call your
+                  function, or evaluate your predicate clause, for each object
+                  in the collection.
         """
         where_clause = self._sub_js_fields(where_clause)
         self._where_clause = where_clause