[refactor] Refactor BaseEmailView to use the FilterByParent mixin

[nemesifier]

This view should be refactored to inherit the FilterByParent mixin:

openwisp-users/openwisp_users/api/views.py

Lines 201 to 242 in 670ec93

	class BaseEmailView(ProtectedAPIMixin, GenericAPIView):
	model = EmailAddress
	serializer_class = EmailAddressSerializer
	def get_queryset(self):
	return EmailAddress.objects.select_related('user').order_by('id')
	def initial(self, *args, **kwargs):
	super().initial(*args, **kwargs)
	self.assert_parent_exists()
	def assert_parent_exists(self):
	try:
	assert self.get_parent_queryset().exists()
	except (AssertionError, ValidationError):
	user_id = self.kwargs['pk']
	raise NotFound(detail=_("User with ID '{}' not found.".format(user_id)))
	def get_parent_queryset(self):
	user = self.request.user
	if user.is_superuser:
	return User.objects.filter(pk=self.kwargs['pk'])
	org_users = OrganizationUser.objects.filter(user=user).select_related(
	'organization'
	)
	qs_user = User.objects.none()
	for org_user in org_users:
	if org_user.is_admin:
	qs_user = qs_user | org_user.organization.users.all().distinct()
	qs_user = qs_user.filter(is_superuser=False)
	return qs_user.filter(pk=self.kwargs['pk'])
	def get_serializer_context(self):
	if getattr(self, 'swagger_fake_view', False):
	# To get rid of assertion error raised in
	# the dev server, and for schema generation
	return None
	context = super().get_serializer_context()
	context['user'] = self.get_parent_queryset().first()
	return context

[MihirKohli]

Can you assign me this issue?

[MihirKohli]

Resolved #358