discourse/db/migrate/20180718062728_create_post_...

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# frozen_string_literal: true
require 'migration/column_dropper'
class CreatePostReplyKeys < ActiveRecord::Migration[5.2]
def up
create_table :post_reply_keys do |t|
t.integer :user_id, null: false
t.integer :post_id, null: false
t.uuid :reply_key, null: false
t.timestamps null: false
end
add_index :post_reply_keys, :reply_key, unique: true
Migration::ColumnDropper.mark_readonly(:email_logs, :reply_key)
sql = <<~SQL
DELETE FROM email_logs
WHERE id IN (
SELECT id
FROM (
SELECT
id,
ROW_NUMBER() OVER(PARTITION BY post_id, user_id ORDER BY id DESC) AS row_num
FROM email_logs
) t
WHERE t.row_num > 1
)
SQL
execute(sql)
sql = <<~SQL
INSERT INTO post_reply_keys(
user_id, post_id, reply_key, updated_at, created_at
) SELECT
user_id,
post_id,
reply_key,
updated_at,
created_at
FROM email_logs
2018-07-24 04:36:18 -04:00
WHERE reply_key IS NOT NULL AND post_id IS NOT NULL AND user_id IS NOT NULL
SQL
execute(sql)
add_index :post_reply_keys, [:user_id, :post_id], unique: true
end
def down
raise ActiveRecord::IrreversibleMigration
end
end