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correct migration so it always populates column

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Sam Saffron 2017-05-25 18:50:51 -04:00
parent 7d59ff67b8
commit 6674611960
1 changed files with 2 additions and 2 deletions
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db/migrate/20170524182846_add_unread_tracking_columns.rb
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@ -4,11 +4,11 @@ class AddUnreadTrackingColumns < ActiveRecord::Migration
add_column :topics, :last_unread_at, :datetime, null: false, default: "epoch" add_column :topics, :last_unread_at, :datetime, null: false, default: "epoch"
execute <<SQL execute <<SQL
UPDATE topics SET last_unread_at = ( UPDATE topics SET last_unread_at = COALESCE((
SELECT MAX(created_at) SELECT MAX(created_at)
FROM posts FROM posts
WHERE topics.id = posts.topic_id WHERE topics.id = posts.topic_id
) ), current_timestamp)
SQL SQL
execute <<SQL execute <<SQL