25 lines
752 B
Ruby
25 lines
752 B
Ruby
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class ArchiveSystemMessagesWithNoReplies < ActiveRecord::Migration
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def up
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# backdate archival of system messages send on behalf of site_contact_user
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execute <<SQL
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INSERT INTO user_archived_messages (user_id, topic_id, created_at, updated_at)
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SELECT p.user_id, p.topic_id, p.created_at, p.updated_at
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FROM posts p
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JOIN topics t ON t.id = p.topic_id
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LEFT JOIN user_archived_messages um ON um.user_id = p.user_id AND um.topic_id = p.topic_id
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WHERE t.subtype = 'system_message' AND
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t.posts_count = 1 AND
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t.archetype = 'private_message' AND
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um.id IS NULL AND
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p.user_id IS NOT NULL AND
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p.topic_id IS NOT NULL AND
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p.post_number = 1
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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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