Fix validate_doc_update when recreating a document

This fixes the behavior when validating a document update that is
recreating a previously deleted document. Before this fix we were
sending a document body with `"_deleted":true` as the existing document.
However, CouchDB behavior expects the previous document passed to VDU's
to be `null` in this case.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/fabric/src/fabric2_db.erl b/src/fabric/src/fabric2_db.erl
index acd473f12..48e50f11c 100644
--- a/src/fabric/src/fabric2_db.erl
+++ b/src/fabric/src/fabric2_db.erl
@@ -1196,8 +1196,13 @@ prep_and_validate(Db, NewDoc, PrevRevInfo) ->
         _ -> false
     end,
 
+    WasDeleted = case PrevRevInfo of
+        not_found -> false;
+        #{deleted := D} -> D
+    end,
+
     PrevDoc = case HasStubs orelse (HasVDUs and not IsDDoc) of
-        true when PrevRevInfo /= not_found ->
+        true when PrevRevInfo /= not_found, not WasDeleted ->
             case fabric2_fdb:get_doc_body(Db, NewDoc#doc.id, PrevRevInfo) of
                 #doc{} = PDoc -> PDoc;
                 {not_found, _} -> nil