From f5df9108945cdcfe0c095bcb64903b9269adad2f Mon Sep 17 00:00:00 2001
From: jonaswinkler <jonas.winkler@jpwinkler.de>
Date: Fri, 11 Dec 2020 23:34:24 +0100
Subject: [PATCH] document list validation.

---
 src/documents/serialisers.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/documents/serialisers.py b/src/documents/serialisers.py
index 5418ec0fb..92fc35719 100644
--- a/src/documents/serialisers.py
+++ b/src/documents/serialisers.py
@@ -185,6 +185,13 @@ class BulkEditSerializer(serializers.Serializer):
 
     parameters = serializers.DictField(allow_empty=True)
 
+    def validate_documents(self, documents):
+        count = Document.objects.filter(id__in=documents).count()
+        if not count == len(documents):
+            raise serializers.ValidationError(
+                "Some documents don't exist or were specified twice.")
+        return documents
+
     def validate_method(self, method):
         if method == "set_correspondent":
             return bulk_edit.set_correspondent