Answers for "Exception Value: Raw query must include the primary key"

raw query must include primary key

queryset=country_model.objects.raw('SELECT myapp_country_model.cname,myapp_state_model.sname FROM myapp_country_model INNER JOIN myapp_state_model on myapp_country_model.id=myapp_state_model.cid_id')
Solution
queryset=country_model.objects.raw('SELECT myapp_country_model.id,myapp_country_model.cname,myapp_state_model.sname FROM myapp_country_model INNER JOIN myapp_state_model on myapp_country_model.id=myapp_state_model.cid_id ')