something went wrong with VCS, trying fix it

gluon/dal.py

@@ -4719,12 +4719,17 @@ class GoogleDatastoreAdapter(NoSQLAdapter):
                         "text and blob field types not allowed in projection queries")
                 else:
                     projection.append(f.name)
+        elif args_get('filterfields') == True:
+            projection = []
+            for f in fields:
+                projection.append(f.name)
 
-        # projection's can't include 'id'.
+        # real projection's can't include 'id'.
         # it will be added to the result later
         query_projection = [
             p for p in projection if \
-                p != db[tablename]._id.name] if projection \
+                p != db[tablename]._id.name] if projection and \
+                args_get('projection') == True\
                 else None
 
         cursor = None
@@ -4802,6 +4807,11 @@ class GoogleDatastoreAdapter(NoSQLAdapter):
            what is accepted imposed by GAE: each field must be indexed,
            projection queries cannot contain blob or text fields, and you
            cannot use == and also select that same field.  see https://developers.google.com/appengine/docs/python/datastore/queries#Query_Projection
+         - optional attribute 'filterfields' when set to True web2py will only
+           parse the explicitly listed fields into the Rows object, even though
+           all fields are returned in the query.  This can be used to reduce
+           memory usage in cases where true projection queries are not
+           usable.
          - optional attribute 'reusecursor' allows use of cursor with queries
            that have the limitby attribute.  Set the attribute to True for the
            first query, set it to the value of db['_lastcursor'] to continue