[Cheetahtemplate-discuss] Psycopg DictRow works with Python NameMapper, doesn't work with C version

[Matthew B. <mat...@gt...>]

Hi all,

I'm getting this error from Cheetah when using the C namemapper, where the
Python version works fine:

<class 'NameMapper.NotFound'>: cannot find 'shipment_id' while searching for
'shipment.shipment_id'
     args = ("cannot find 'shipment_id' while searching for
'shipment.shipment_id'",)
     message = "cannot find 'shipment_id' while searching for
'shipment.shipment_id'"

The "shipment" object is a DictRow, which is a psycopg2 thing that inherits
from list to allow both list-style and dict-style access to the contents of
a row returned from a query (below).  I'm trying to access the shipment_id
field in the returned row, and the call works fine with the Python
namemapper.  What is the C namemapper doing differently that breaks this
behaviour?  Can I fix it?  I'm using the latest CVS version.

thanks!



class DictRow(list):
   """A row object that allow by-colun-name access to data."""

   def __init__(self, cursor):
       self._index = cursor.index
       self[:] = [None] * len(cursor.description)

   def __getitem__(self, x):
       if type(x) != int:
           x = self._index[x]
       return list.__getitem__(self, x)

   def items(self):
       res = []
       for n, v in self._index.items():
           res.append((n, list.__getitem__(self, v)))
       return res

   def keys(self):
       return self._index.keys()

   def values(self):
       return tuple(self[:])

   def has_key(self, x):
       return self._index.has_key(x)

   def get(self, x, default=None):
       try:
           return self[x]
       except:
           return default

   def iteritems(self):
       for n, v in self._index.items():
           yield n, list.__getitem__(self, v)