old_contents: from api.generics.filters import CommaSeparatedCharFilter, TogetherFilterSet
  from iati_organisation.models import Organisation
  
  
  class OrganisationFilter(TogetherFilterSet):
      organisation_identifier = CommaSeparatedCharFilter(
          field_name='organisation_identifier',
          lookup_expr='in'
      )
      name = CommaSeparatedCharFilter(
          field_name='primary_name',
          lookup_expr='exact'
      )
  
      class Meta:
          model = Organisation
          fields = ['organisation_identifier',
                    'name']
  
new_contents: from api.generics.filters import CommaSeparatedCharFilter, TogetherFilterSet
  from iati_organisation.models import Organisation
  
  
  class OrganisationFilter(TogetherFilterSet):
      # naming is according to IATI standard.
      reporting_organisation_identifier = CommaSeparatedCharFilter(
          field_name='organisation_identifier',
          lookup_expr='in'
      )
      name = CommaSeparatedCharFilter(
          field_name='primary_name',
          lookup_expr='exact'
      )
  
      class Meta:
          model = Organisation
          fields = []
  
subject: change filter name according to IATI standard.