forked from Trustie/forgeplus
18 lines
656 B
Ruby
18 lines
656 B
Ruby
class UserVoteOption < ApplicationRecord
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belongs_to :user
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belongs_to :vote_option, counter_cache: true
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validates :user_id, uniqueness: { scope: :vote_option_id, message: "您已经投过票了" }
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private
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def user_can_vote_only_once_per_vote
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return unless user && vote_option
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existing_vote = UserVoteOption.joins(:vote_option)
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.where(user_id: user_id, vote_options: { vote_id: vote_option.vote_id })
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.where.not(id: id) # 排除自身（更新时）
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.exists?
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errors.add(:base, '您已经投过票了') if existing_vote
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end
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end
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