Add m2m relation to custom role

Custom role can be now added by typing the custom role name and selecting
if the role name is board member or not.
Added also error page redirection if something fails in Kaehmyform validation.

webapp/views.py

@@ -120,16 +120,18 @@ def kaehmy_submit(request, *args, **kwargs):
     """Submit Kaehmy form."""
     form = KaehmyForm_Form(request.POST)
     if form.is_valid():
-        print("Formi oli validi")
-        form.save()
-        # custom_name = form.cleaned_data.get('custom_role_name')
-        # custom_is_board = form.cleaned_data.get('custom_role_is_board')
-        # custom_role = CustomKaehmyRole(
-        #     name=custom_name, is_board=custom_is_board)
-        # custom_role.save()
+        application = form.save()
+        custom_name = form.cleaned_data.get('custom_role_name')
+        custom_is_board = form.cleaned_data.get('custom_role_is_board')
+        custom_role = CustomKaehmyRole(
+            name=custom_name, is_board=custom_is_board)
+        custom_role.save()
+        application.custom_roles.add(custom_role)
     else:
-        return HttpResponseRedirect('/')
-        # return render(request, 'error.html', {'error': form.errors})
+        context = {
+            'errors': form.errors
+        }
+        return render(request, 'error.html', context)
     return HttpResponseRedirect('/kaehmy')