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mastodon/app/models/poll.rb
afontenot f17fc5742e
Clear voter count when poll is reset (#21700)
When a poll is edited, we reset the poll and remove all previous
votes. However, prior to this commit, the voter count on the poll
was not reset. This leads to incorrect percentages being shown in
poll results.

Fixes #21696
2022-11-26 23:08:25 +01:00

123 lines
3.2 KiB
Ruby

# frozen_string_literal: true
# == Schema Information
#
# Table name: polls
#
# id :bigint(8) not null, primary key
# account_id :bigint(8)
# status_id :bigint(8)
# expires_at :datetime
# options :string default([]), not null, is an Array
# cached_tallies :bigint(8) default([]), not null, is an Array
# multiple :boolean default(FALSE), not null
# hide_totals :boolean default(FALSE), not null
# votes_count :bigint(8) default(0), not null
# last_fetched_at :datetime
# created_at :datetime not null
# updated_at :datetime not null
# lock_version :integer default(0), not null
# voters_count :bigint(8)
#
class Poll < ApplicationRecord
include Expireable
belongs_to :account
belongs_to :status
has_many :votes, class_name: 'PollVote', inverse_of: :poll, dependent: :delete_all
has_many :voters, -> { group('accounts.id') }, through: :votes, class_name: 'Account', source: :account
has_many :notifications, as: :activity, dependent: :destroy
validates :options, presence: true
validates :expires_at, presence: true, if: :local?
validates_with PollValidator, on: :create, if: :local?
scope :attached, -> { where.not(status_id: nil) }
scope :unattached, -> { where(status_id: nil) }
before_validation :prepare_options, if: :local?
before_validation :prepare_votes_count
before_validation :prepare_cached_tallies
after_commit :reset_parent_cache, on: :update
def loaded_options
options.map.with_index { |title, key| Option.new(self, key.to_s, title, show_totals_now? ? (cached_tallies[key] || 0) : nil) }
end
def possibly_stale?
remote? && last_fetched_before_expiration? && time_passed_since_last_fetch?
end
def voted?(account)
account.id == account_id || votes.where(account: account).exists?
end
def own_votes(account)
votes.where(account: account).pluck(:choice)
end
delegate :local?, to: :account
def remote?
!local?
end
def emojis
@emojis ||= CustomEmoji.from_text(options.join(' '), account.domain)
end
class Option < ActiveModelSerializers::Model
attributes :id, :title, :votes_count, :poll
def initialize(poll, id, title, votes_count)
super(
poll: poll,
id: id,
title: title,
votes_count: votes_count,
)
end
end
def reset_votes!
self.cached_tallies = options.map { 0 }
self.votes_count = 0
self.voters_count = 0
votes.delete_all unless new_record?
end
private
def prepare_cached_tallies
self.cached_tallies = options.map { 0 } if cached_tallies.empty?
end
def prepare_votes_count
self.votes_count = cached_tallies.sum unless cached_tallies.empty?
end
def prepare_options
self.options = options.map(&:strip).reject(&:blank?)
end
def reset_parent_cache
return if status_id.nil?
Rails.cache.delete("statuses/#{status_id}")
end
def last_fetched_before_expiration?
last_fetched_at.nil? || expires_at.nil? || last_fetched_at < expires_at
end
def time_passed_since_last_fetch?
last_fetched_at.nil? || last_fetched_at < 1.minute.ago
end
def show_totals_now?
expired? || !hide_totals?
end
end