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-rw-r--r--app/services/merge_requests/build_service.rb12
1 files changed, 12 insertions, 0 deletions
diff --git a/app/services/merge_requests/build_service.rb b/app/services/merge_requests/build_service.rb
index b28f80939ae..308a3a10d1a 100644
--- a/app/services/merge_requests/build_service.rb
+++ b/app/services/merge_requests/build_service.rb
@@ -18,6 +18,18 @@ module MergeRequests
merge_request.target_project = find_target_project
filter_params(merge_request)
+
+ # merge_request.assign_attributes(...) below is a Rails
+ # method that only work if all the params it is passed have
+ # corresponding fields in the database. As there are no fields
+ # in the database for :add_label_ids and :remove_label_ids, we
+ # need to remove them from the params before the call to
+ # merge_request.assign_attributes(...)
+ #
+ # IssuableBaseService#process_label_ids takes care
+ # of the removal.
+ params[:label_ids] = process_label_ids(params, extra_label_ids: merge_request.label_ids.to_a)
+
merge_request.assign_attributes(params.to_h.compact)
merge_request.compare_commits = []