old_contents: from plstackapi.openstack.client import OpenStackClient
  from plstackapi.openstack.driver import OpenStackDriver
  from plstackapi.planetstack.api.auth import auth_check
  from plstackapi.planetstack.models import *
   
  
  def add_role(auth, name):
      driver = OpenStackDriver(client = auth_check(auth))    
      keystone_role = driver.create_role(name=name)
      role = Role(role_type=name, role_id=keystone_role.id)
      role.save()
      return role
  
  def delete_role(auth, filter={}):
      driver = OpenStackDriver(client = auth_check(auth))   
      role = Role.objects.filter(**filter)
      driver.delete_role({'id': role.role_id}) 
  
      role.delete()
      return 1
  
  def get_roles(auth, filter={}):
      client = auth_check(auth)
      roles = Role.objects.filter(**filter)
      return roles             
          
  
      
  
new_contents: from plstackapi.openstack.client import OpenStackClient
  from plstackapi.openstack.driver import OpenStackDriver
  from plstackapi.planetstack.api.auth import auth_check
  from plstackapi.planetstack.models import *
   
  
  def add_role(auth, name):
      driver = OpenStackDriver(client = auth_check(auth))    
      keystone_role = driver.create_role(name=name)
      role = Role(role_type=name, role_id=keystone_role.id)
      role.save()
      return role
  
  def delete_role(auth, filter={}):
      driver = OpenStackDriver(client = auth_check(auth))   
      roles = Role.objects.filter(**filter)
      for role in roles:
          driver.delete_role({'id': role.role_id}) 
          role.delete()
      return 1
  
  def get_roles(auth, filter={}):
      client = auth_check(auth)
      roles = Role.objects.filter(**filter)
      return roles             
          
  
      
  
subject: fix bugs