Fix single-record invalid condition on PollVote (#23810)

2 files changed, 24 insertions, 3 deletions

diff --git a/app/models/poll_vote.rb b/app/models/poll_vote.rb
index 00eaedd12..92d74a6db 100644
--- a/app/models/poll_vote.rb
+++ b/app/models/poll_vote.rb
@@ -23,6 +23,7 @@ class PollVote < ApplicationRecord
   after_create_commit :increment_counter_cache
 
   delegate :local?, to: :account
+  delegate :multiple?, :expired?, to: :poll, prefix: true
 
   def object_type
     :vote
diff --git a/app/validators/vote_validator.rb b/app/validators/vote_validator.rb
index b1692562d..9c55f9ab6 100644
--- a/app/validators/vote_validator.rb
+++ b/app/validators/vote_validator.rb
@@ -2,13 +2,13 @@
 
 class VoteValidator < ActiveModel::Validator
   def validate(vote)
-    vote.errors.add(:base, I18n.t('polls.errors.expired')) if vote.poll.expired?
+    vote.errors.add(:base, I18n.t('polls.errors.expired')) if vote.poll_expired?
 
     vote.errors.add(:base, I18n.t('polls.errors.invalid_choice')) if invalid_choice?(vote)
 
-    if vote.poll.multiple? && vote.poll.votes.where(account: vote.account, choice: vote.choice).exists?
+    if vote.poll_multiple? && already_voted_for_same_choice_on_multiple_poll?(vote)
       vote.errors.add(:base, I18n.t('polls.errors.already_voted'))
-    elsif !vote.poll.multiple? && vote.poll.votes.where(account: vote.account).exists?
+    elsif !vote.poll_multiple? && already_voted_on_non_multiple_poll?(vote)
       vote.errors.add(:base, I18n.t('polls.errors.already_voted'))
     end
   end
@@ -18,4 +18,24 @@ class VoteValidator < ActiveModel::Validator
   def invalid_choice?(vote)
     vote.choice.negative? || vote.choice >= vote.poll.options.size
   end
+
+  def already_voted_for_same_choice_on_multiple_poll?(vote)
+    if vote.persisted?
+      account_votes_on_same_poll(vote).where(choice: vote.choice).where.not(poll_votes: { id: vote }).exists?
+    else
+      account_votes_on_same_poll(vote).where(choice: vote.choice).exists?
+    end
+  end
+
+  def already_voted_on_non_multiple_poll?(vote)
+    if vote.persisted?
+      account_votes_on_same_poll(vote).where.not(poll_votes: { id: vote }).exists?
+    else
+      account_votes_on_same_poll(vote).exists?
+    end
+  end
+
+  def account_votes_on_same_poll(vote)
+    vote.poll.votes.where(account: vote.account)
+  end
 end