text: from university.models import University, UniversityGroupBlock
  
  
  class PollRouter:
      """
      A router to control all database operations on models in the
      poll application.
      """
      def db_for_read(self, model, **hints):
          if model == UniversityGroupBlock or model == University:
              return 'info_db'
          return 'default'
  
      def db_for_write(self, model, **hints):
          if model == UniversityGroupBlock or model == University:
              return 'info_db'
          return 'default'
  
      def allow_relation(self, obj1, obj2, **hints):
          return 'default'
  
      def allow_migrate(self, db, app_label, model_name=None, **hints):
          return 'default'
  