code: def save(self, *args, **kwargs):
          
          if self.name == '':
              raise FieldError
          else:
              return super(CrossRefDB, self).save(*args, **kwargs)
docs: Extends save() method of Django models to check that the database name
          is not left blank.
          Note: 'blank=False' is only checked at a form-validation-stage. A test
          using Fixtureless that tries to randomly create a CrossRefDB with an
          empty string name would unintentionally break the test.