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cb87ef52de
Since we created user_chat_thread_memberships in
cc2570f we haven't
yet backfilled it for users who previously sent a message in
in threads -- this migration creates the UserChatThreadMemberships
needed for those threads, making sure the last read message id
is accurate for those participants.
52 lines
1.6 KiB
Ruby
52 lines
1.6 KiB
Ruby
# frozen_string_literal: true
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class BackfillThreadMemberships < ActiveRecord::Migration[7.0]
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def up
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thread_tracking_notification_level = 2
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sql = <<~SQL
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INSERT INTO user_chat_thread_memberships(
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user_id,
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thread_id,
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notification_level,
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last_read_message_id,
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created_at,
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updated_at
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)
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SELECT
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thread_participant_stats.user_id,
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thread_participant_stats.thread_id,
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#{thread_tracking_notification_level},
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(
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SELECT id FROM chat_messages
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WHERE thread_id = thread_participant_stats.thread_id
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AND deleted_at IS NULL
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ORDER BY created_at DESC, id DESC
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LIMIT 1
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),
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NOW(),
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NOW()
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FROM (
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SELECT chat_messages.thread_id, chat_messages.user_id
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FROM chat_messages
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INNER JOIN chat_threads ON chat_threads.id = chat_messages.thread_id
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WHERE chat_messages.thread_id IS NOT NULL
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GROUP BY chat_messages.thread_id, chat_messages.user_id
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ORDER BY chat_messages.thread_id ASC, chat_messages.user_id ASC
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) AS thread_participant_stats
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INNER JOIN users ON users.id = thread_participant_stats.user_id
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LEFT JOIN user_chat_thread_memberships ON user_chat_thread_memberships.thread_id = thread_participant_stats.thread_id
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AND user_chat_thread_memberships.user_id = thread_participant_stats.user_id
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WHERE user_chat_thread_memberships IS NULL
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ORDER BY user_chat_thread_memberships.thread_id ASC
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ON CONFLICT DO NOTHING;
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SQL
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execute(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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