views: in the *_by_document view, redirect to the first owned mailbox if multiple one are returned or the first no owned mailbox is returned

fixes #3886

docbow_project/docbow/views.py

@@ -423,18 +423,30 @@ def get_free_delegation_number(user):
 @login_required
 @never_cache
 def inbox_by_document(request, document_id):
-    mailbox = get_object_or_404(mailboxes(request), document=document_id,
-            outbox=False)
-    return redirect('inbox-message', mailbox.id, permanent=True)
+    mboxes = mailboxes(request).filter(document=document_id, outbox=False)
+    if not mailboxes:
+        raise Http404('No document found')
+    for mbox in mboxes:
+        if mbox.owner == request.user:
+            break
+    else:
+        mbox = mboxes[0]
+    return redirect('inbox-message', mbox.id)
 
 
 
 @login_required
 @never_cache
 def outbox_by_document(request, document_id):
-    mailbox = get_object_or_404(mailboxes(request), document=document_id,
-            outbox=True)
-    return redirect('outbox-message', mailbox.id, permanent=True)
+    mboxes = mailboxes(request).filter(document=document_id, outbox=True)
+    if not mailboxes:
+        raise Http404('No document found')
+    for mbox in mboxes:
+        if mbox.owner == request.user:
+            break
+    else:
+        mbox = mboxes[0]
+    return redirect('outbox-message', mbox.id)
 
 
 from django.contrib.auth import SESSION_KEY, BACKEND_SESSION_KEY