15 lines
286 B
Ruby
15 lines
286 B
Ruby
class RemoveInvalidTopicUser < ActiveRecord::Migration[4.2]
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def up
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execute <<-SQL
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DELETE FROM topic_users
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USING topic_users tu
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LEFT JOIN users u ON u.id = tu.user_id
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WHERE u.id IS NULL
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AND topic_users.id = tu.id
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SQL
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end
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def down
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end
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end
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