Commit e9f6dbdf authored by cmrd Senya's avatar cmrd Senya Committed by Benjamin Neff

Add unique index to poll participations on author_id and poll_id

Previously we had only a Rails validation which ensured poll participation
uniqueness but this adds uniqueness control to the database level, so that
uniqueness is guaranteed even when changing data with avoiding Rails

closes #7798
parent b7cd9d62
# #
## Refactor ## Refactor
* Add unique index to poll participations on `poll_id` and `author_id` [#7798](
## Bug fixes ## Bug fixes
# frozen_string_literal: true
class AddPollParticipationsUniqueIndexOnAuthorAndPoll < ActiveRecord::Migration[5.1]
def change
reversible do |change|
change.up do
duplicate_query = "WHERE a1.poll_id = a2.poll_id AND a1.author_id = a2.author_id AND >"
if AppConfig.postgres?
execute("DELETE FROM poll_participations AS a1 USING poll_participations AS a2 #{duplicate_query}")
execute("DELETE a1 FROM poll_participations a1, poll_participations a2 #{duplicate_query}")
add_index :poll_participations, %i[poll_id author_id], unique: true
remove_index :poll_participations, :poll_id
...@@ -24,6 +24,16 @@ describe PollParticipation, type: :model do ...@@ -24,6 +24,16 @@ describe PollParticipation, type: :model do
bob.participate_in_poll!(status, poll.poll_answers.first) bob.participate_in_poll!(status, poll.poll_answers.first)
}.to_not raise_error }.to_not raise_error
end end
it "has unique DB index for author-person" do
pp = FactoryGirl.create(:poll_participation)
pp2 = FactoryGirl.create(:poll_participation, author:
expect {
# rubocop:disable Rails/SkipsModelValidations
pp2.update_attribute(:poll_id, pp.poll_id)
# rubocop:enable Rails/SkipsModelValidations
}.to raise_error ActiveRecord::RecordNotUnique
end end
it_behaves_like "it is relayable" do it_behaves_like "it is relayable" do
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