Check whether new translation breaks any checks

trans/views.py

@@ -192,6 +192,8 @@ def translate(request, project, subproject, lang):
                     # We accept translations only from authenticated
                     messages.add_message(request, messages.ERROR, _('You need to log in to be able to save translations!'))
                 else:
+                    # Remember old checks
+                    oldchecks = set(unit.active_checks().values_list('check', flat = True))
                     # Update unit and save it
                     unit.target = join_plural(form.cleaned_data['target'])
                     unit.fuzzy = form.cleaned_data['fuzzy']
@@ -199,6 +201,19 @@ def translate(request, project, subproject, lang):
                     # Update stats
                     profile.translated += 1
                     profile.save()
+                    # Get new set of checks
+                    newchecks = set(unit.active_checks().values_list('check', flat = True))
+                    # Did we introduce any new failures?
+                    if newchecks >= oldchecks:
+                        # Show message to user
+                        messages.add_message(request, messages.ERROR, _('Some checks have failed on your translation!'))
+                        # Stay on same entry
+                        return HttpResponseRedirect('%s?type=%s&oldpos=%d&dir=stay%s' % (
+                            obj.get_translate_url(),
+                            rqtype,
+                            pos,
+                            search_url
+                        ))
 
                 # Redirect to next entry
                 return HttpResponseRedirect('%s?type=%s&oldpos=%d%s' % (