Optimise import performanceoptimise-import-performance

- Fix `O(n)` complexity of `append_or_update_attribute`,
  we append objects to an array and re-save project
- Remove the usage of `keys.include?` as it performs `O(n)`
  search, instead use `.has_key?`
- Remove the usage of `.keys.first` as it performs a copy
  of all keys, instead use `.first.first`

1 files changed, 1 insertions, 4 deletions

diff --git a/spec/models/project_spec.rb b/spec/models/project_spec.rb
index bcb2da7eed2..da9e204d4ca 100644
--- a/spec/models/project_spec.rb
+++ b/spec/models/project_spec.rb
@@ -3097,11 +3097,8 @@ describe Project do
     let(:project) { create(:project) }
 
     it 'shows full error updating an invalid MR' do
-      error_message = 'Failed to replace merge_requests because one or more of the new records could not be saved.'\
-        ' Validate fork Source project is not a fork of the target project'
-
       expect { project.append_or_update_attribute(:merge_requests, [create(:merge_request)]) }
-        .to raise_error(ActiveRecord::RecordNotSaved, error_message)
+        .to raise_error(ActiveRecord::RecordInvalid, /Failed to set merge_requests:/)
     end
 
     it 'updates the project successfully' do