Reduce exception nesting

trans/views/edit.py

@@ -161,9 +161,10 @@ def handle_translate(obj, request, user_locked, this_unit_url, next_unit_url):
     form = TranslationForm(request.POST)
     if not form.is_valid():
         return
+
     # Check whether translation is not outdated
     obj.check_sync()
-    try:
+
     try:
         unit = Unit.objects.get(
             checksum=form.cleaned_data['checksum'],
@@ -176,6 +177,17 @@ def handle_translate(obj, request, user_locked, this_unit_url, next_unit_url):
             checksum=form.cleaned_data['checksum'],
             translation=obj
         )[0]
+    except Unit.DoesNotExist:
+        weblate.logger.error(
+            'message %s disappeared!',
+            form.cleaned_data['checksum']
+        )
+        messages.error(
+            request,
+            _('Message you wanted to translate is no longer available!')
+        )
+        return
+
     if 'suggest' in request.POST:
         # Handle suggesion saving
         user = request.user
@@ -239,15 +251,6 @@ def handle_translate(obj, request, user_locked, this_unit_url, next_unit_url):
 
     # Redirect to next entry
     return HttpResponseRedirect(next_unit_url)
-    except Unit.DoesNotExist:
-        weblate.logger.error(
-            'message %s disappeared!',
-            form.cleaned_data['checksum']
-        )
-        messages.error(
-            request,
-            _('Message you wanted to translate is no longer available!')
-        )
 
 
 def handle_merge(obj, request, next_unit_url):