30 lines
984 B
Ruby
30 lines
984 B
Ruby
|
# frozen_string_literal: true
|
||
|
|
|
||
|
|
class UpdatePostReplyIndexes < ActiveRecord::Migration[6.0]
|
||
|
|
# Adding and removing indexes concurrently doesn't work within transaction.
|
||
|
|
# It also needs existence checks for indexes in case the migration fails and needs to run again.
|
||
|
|
disable_ddl_transaction!
|
||
|
|
|
||
|
|
def up
|
||
|
|
if !index_exists?(:post_replies, [:post_id, :reply_post_id])
|
||
|
|
add_index :post_replies, [:post_id, :reply_post_id], unique: true, algorithm: :concurrently
|
||
|
|
end
|
||
|
|
|
||
|
|
if !index_exists?(:post_replies, [:reply_post_id])
|
||
|
|
add_index :post_replies, [:reply_post_id], algorithm: :concurrently
|
||
|
|
end
|
||
|
|
|
||
|
|
if index_exists?(:post_replies, [:post_id, :reply_id])
|
||
|
|
remove_index :post_replies, column: [:post_id, :reply_id], algorithm: :concurrently
|
||
|
|
end
|
||
|
|
|
||
|
|
if index_exists?(:post_replies, [:reply_id])
|
||
|
|
remove_index :post_replies, column: [:reply_id], algorithm: :concurrently
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
def down
|
||
|
|
raise ActiveRecord::IrreversibleMigration
|
||
|
|
end
|
||
|
|
end
|