Fixes Web IDE not loading merge request files

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/60243

1 files changed, 3 insertions, 0 deletions

diff --git a/app/assets/javascripts/ide/stores/mutations/merge_request.js b/app/assets/javascripts/ide/stores/mutations/merge_request.js
index 334819fe702..e5b5107bc93 100644
--- a/app/assets/javascripts/ide/stores/mutations/merge_request.js
+++ b/app/assets/javascripts/ide/stores/mutations/merge_request.js
@@ -7,6 +7,8 @@ export default {
     });
   },
   [types.SET_MERGE_REQUEST](state, { projectPath, mergeRequestId, mergeRequest }) {
+    const existingMergeRequest = state.projects[projectPath].mergeRequests[mergeRequestId] || {};
+
     Object.assign(state.projects[projectPath], {
       mergeRequests: {
         [mergeRequestId]: {
@@ -15,6 +17,7 @@ export default {
           changes: [],
           versions: [],
           baseCommitSha: null,
+          ...existingMergeRequest,
         },
       },
     });