old_contents: from .utils import organization_manager
  from .models import Organization
  
  
  def organizations(request):
      """
      Add some generally useful metadata to the template context
      """
      # selected organization
      orga = organization_manager.get_selected_organization(request)
  
      # all user authorized organizations
      if not request.user or not request.user.is_authenticated():
          user_organizations = None
      else:
          user_organizations = request.user.organizations.all()
  
      return {
          'user_organizations': user_organizations,
          'selected_organization': orga,
      }
  
new_contents: from django.db.models import Q
  
  from .utils import organization_manager
  from .models import Organization
  
  
  def organizations(request):
      """
      Add some generally useful metadata to the template context
      """
      # selected organization
      orga = organization_manager.get_selected_organization(request)
  
      # all user authorized organizations
      if not request.user or not request.user.is_authenticated():
          user_organizations = None
      else:
          user = request.user
          user_organizations = (Organization.objects
              .filter(Q(members=user) | Q(owner=user)))
  
      return {
          'user_organizations': user_organizations,
          'selected_organization': orga,
      }
  
subject: Use owner or member filter for the dropdown