Is Paid check.

accounts_models.py

Profile:
  is_parent = ....
  
  def family_is_paid(self):
      try:
        parent = self.profile_parent.family
        if family.is_paid:
          return True
      except ObjectDoesNotExist:
        return False
      return False
      

dashboard.html

{{ if user.profile_user.family_is_paid }}

{{ endif }}

decorator.py

if request.user.profile_user.family_is_paid:
  return function()