Fixed resolved discussions not toggling expanded

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/51370

1 files changed, 1 insertions, 6 deletions

diff --git a/app/assets/javascripts/notes/stores/mutations.js b/app/assets/javascripts/notes/stores/mutations.js
index 2c04bfea122..16bb54be126 100644
--- a/app/assets/javascripts/notes/stores/mutations.js
+++ b/app/assets/javascripts/notes/stores/mutations.js
@@ -214,12 +214,7 @@ export default {
 
   [types.SET_DISCUSSION_DIFF_LINES](state, { discussionId, diffLines }) {
     const discussion = utils.findNoteObjectById(state.discussions, discussionId);
-    const index = state.discussions.indexOf(discussion);
 
-    const discussionWithDiffLines = Object.assign({}, discussion, {
-      truncated_diff_lines: diffLines,
-    });
-
-    state.discussions.splice(index, 1, discussionWithDiffLines);
+    discussion.truncated_diff_lines = diffLines;
   },
 };