21 lines
573 B
Ruby
21 lines
573 B
Ruby
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# frozen_string_literal: true
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class EnsuresUniqueAcceptedAnswerPostId < ActiveRecord::Migration[5.2]
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def change
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execute <<~SQL
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DELETE FROM topic_custom_fields AS tcf1
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USING topic_custom_fields AS tcf2
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WHERE tcf1.id > tcf2.id AND
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tcf1.topic_id = tcf2.topic_id AND
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tcf1.name = tcf2.name AND
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tcf1.name = 'accepted_answer_post_id'
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SQL
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add_index :topic_custom_fields,
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:topic_id,
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name: :idx_topic_custom_fields_accepted_answer,
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unique: true,
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where: "name = 'accepted_answer_post_id'"
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end
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end
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