14 lines
491 B
Ruby
14 lines
491 B
Ruby
# frozen_string_literal: true
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class IndexUserBadges < ActiveRecord::Migration[4.2]
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def change
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execute "DELETE FROM user_badges USING user_badges ub2
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WHERE user_badges.badge_id = ub2.badge_id AND
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user_badges.user_id = ub2.user_id AND
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user_badges.post_id IS NOT NULL AND
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user_badges.id < ub2.id
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"
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add_index :user_badges, %i[badge_id user_id post_id], unique: true, where: "post_id IS NOT NULL"
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end
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end
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