Skip before_doc_update processing for local docs

This matches behavior on master:

https://github.com/apache/couchdb/blob/master/src/couch/src/couch_db.erl#L1373-L1387

2 files changed, 30 insertions, 1 deletions

diff --git a/src/fabric/src/fabric2_db_plugin.erl b/src/fabric/src/fabric2_db_plugin.erl
index 41f9e9db6..cb824d7ab 100644
--- a/src/fabric/src/fabric2_db_plugin.erl
+++ b/src/fabric/src/fabric2_db_plugin.erl
@@ -21,6 +21,10 @@
     is_valid_purge_client/2
 ]).
 
+
+-include_lib("couch/include/couch_db.hrl").
+
+
 -define(SERVICE_ID, fabric2_db).
 
 
@@ -32,6 +36,9 @@ validate_dbname(DbName, Normalized, Default) ->
     maybe_handle(validate_dbname, [DbName, Normalized], Default).
 
 
+before_doc_update(_, #doc{id = <<?LOCAL_DOC_PREFIX, _/binary>>} = Doc, _) ->
+    Doc;
+
 before_doc_update(Db, Doc0, UpdateType) ->
     Fun = fabric2_db:get_before_doc_update_fun(Db),
     case with_pipe(before_doc_update, [Doc0, Db, UpdateType]) of
diff --git a/src/fabric/test/fabric2_doc_crud_tests.erl b/src/fabric/test/fabric2_doc_crud_tests.erl
index c19c47421..3cb380827 100644
--- a/src/fabric/test/fabric2_doc_crud_tests.erl
+++ b/src/fabric/test/fabric2_doc_crud_tests.erl
@@ -60,7 +60,8 @@ doc_crud_test_() ->
                 fun delete_local_doc_basic/1,
                 fun recreate_local_doc/1,
                 fun create_local_doc_bad_rev/1,
-                fun create_local_doc_random_rev/1
+                fun create_local_doc_random_rev/1,
+                fun before_doc_update_skips_local_docs/1
             ]}
         }
     }.
@@ -762,3 +763,24 @@ create_local_doc_random_rev({Db, _}) ->
     ?assertEqual({ok, {0, <<"2">>}}, fabric2_db:update_doc(Db, Doc5)),
     {ok, Doc6} = fabric2_db:open_doc(Db, LDocId, []),
     ?assertEqual(Doc5#doc{revs = {0, [<<"2">>]}}, Doc6).
+
+
+before_doc_update_skips_local_docs({Db0, _}) ->
+
+    BduFun = fun(Doc, _, _) ->
+        Doc#doc{body = {[<<"bdu_was_here">>, true]}}
+    end,
+
+    Db = Db0#{before_doc_update := BduFun},
+
+    LDoc1 = #doc{id = <<"_local/ldoc1">>},
+    Doc1 = #doc{id = <<"doc1">>},
+
+    ?assertMatch({ok, {_, _}}, fabric2_db:update_doc(Db, LDoc1)),
+    ?assertMatch({ok, {_, _}}, fabric2_db:update_doc(Db, Doc1)),
+
+    {ok, LDoc2} = fabric2_db:open_doc(Db, LDoc1#doc.id),
+    {ok, Doc2} = fabric2_db:open_doc(Db, Doc1#doc.id),
+
+    ?assertEqual({[]}, LDoc2#doc.body),
+    ?assertEqual({[<<"bdu_was_here">>, true]}, Doc2#doc.body).