39 lines
1.0 KiB
Ruby
39 lines
1.0 KiB
Ruby
# frozen_string_literal: true
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class AddTriggerToSyncPostReplies < ActiveRecord::Migration[6.0]
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def up
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# we don't want this column to be readonly yet
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Migration::ColumnDropper.drop_readonly(:post_replies, :reply_id)
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DB.exec <<~SQL
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CREATE OR REPLACE FUNCTION post_replies_sync_reply_id()
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RETURNS trigger AS $rcr$
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BEGIN
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NEW.reply_post_id := NEW.reply_id;
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RETURN NEW;
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END
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$rcr$ LANGUAGE plpgsql;
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SQL
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DB.exec <<~SQL
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CREATE TRIGGER post_replies_reply_id_sync
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BEFORE INSERT OR UPDATE OF reply_id ON post_replies
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FOR EACH ROW
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WHEN (NEW.reply_id IS NOT NULL)
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EXECUTE PROCEDURE post_replies_sync_reply_id();
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SQL
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# one more sync because we could be missing some data from the time between the
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# "20200116140132_rename_reply_id_column" migration and now
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execute <<~SQL
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UPDATE post_replies
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SET reply_post_id = reply_id
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WHERE reply_post_id IS NULL
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SQL
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end
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def down
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raise ActiveRecord::IrreversibleMigration
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end
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end
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