Friends,

     I have developed a geodjango application using python 2.7, django 1.4, 
mapnik, tilecache and postgis enabled postgresql in ubuntu 12.04. After 
completing the development I installed the same application in RHEL 6, but 
postgis query using geodjango API is not working. The query is

the_geom is geometry value from another table

placeDet = MyModel.objects.filter(thegeom__dwithin=(the_geom, 
250)).distance(the_geom).order_by('distance')

and in the Excepton it shows the error as,

'NoneType' object has no attribute 'group'


Please help me to solve this issue!
 

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