old_contents: from tastypie import fields
  from tastypie.resources import ModelResource, ALL
  from tastypie.authentication import ApiKeyAuthentication
  from tastypie.authorization import Authorization
  from subscription.models import Subscription, MessageSet
  from djcelery.models import PeriodicTask
  
  class PeriodicTaskResource(ModelResource):
      class Meta:
          queryset = PeriodicTask.objects.all()
          resource_name = 'periodic_task'
          list_allowed_methods = ['get']
          include_resource_uri = True
          always_return_data = True
          authentication = ApiKeyAuthentication()
  
  class MessageSetResource(ModelResource):
      class Meta:
          queryset = MessageSet.objects.all()
          resource_name = 'message_set'
          list_allowed_methods = ['get']
          include_resource_uri = True
          always_return_data = True
          authentication = ApiKeyAuthentication()
  
  class SubscriptionResource(ModelResource):
      schedule = fields.ToOneField(PeriodicTaskResource, 'schedule')
      message_set = fields.ToOneField(MessageSetResource, 'message_set')
      class Meta:
          queryset = Subscription.objects.all()
          resource_name = 'subscription'
          list_allowed_methods = ['post', 'get']
          include_resource_uri = True
          always_return_data = True
          authentication = ApiKeyAuthentication()
          authorization = Authorization()
          filtering = {
              'to_addr': ALL,
              'user_account': ALL
          }
  
new_contents: from tastypie import fields
  from tastypie.resources import ModelResource, ALL
  from tastypie.authentication import ApiKeyAuthentication
  from tastypie.authorization import Authorization
  from subscription.models import Subscription, MessageSet
  from djcelery.models import PeriodicTask
  
  class PeriodicTaskResource(ModelResource):
      class Meta:
          queryset = PeriodicTask.objects.all()
          resource_name = 'periodic_task'
          list_allowed_methods = ['get']
          include_resource_uri = True
          always_return_data = True
          authentication = ApiKeyAuthentication()
  
  class MessageSetResource(ModelResource):
      class Meta:
          queryset = MessageSet.objects.all()
          resource_name = 'message_set'
          list_allowed_methods = ['get']
          include_resource_uri = True
          always_return_data = True
          authentication = ApiKeyAuthentication()
  
  class SubscriptionResource(ModelResource):
      schedule = fields.ToOneField(PeriodicTaskResource, 'schedule')
      message_set = fields.ToOneField(MessageSetResource, 'message_set')
      class Meta:
          queryset = Subscription.objects.all()
          resource_name = 'subscription'
          list_allowed_methods = ['post', 'get', 'put', 'patch']
          include_resource_uri = True
          always_return_data = True
          authentication = ApiKeyAuthentication()
          authorization = Authorization()
          filtering = {
              'to_addr': ALL,
              'user_account': ALL
          }
  
subject: Update tastypie methods allowed for subscriptions