Remove old duplicate index (#17245)

Some Mastodon versions (v1.1 and v1.2) had a duplicate index in `db/schema.rb`
without any migration script creating it. #2224 (included in v1.3) removed the
duplicate index from the file but did not provide a migration script to remove
it.

This means that any instance that was installed from v1.1 or v1.2's source code
has a duplicate index and a corresponding warning in PgHero. Instances set up
using an earlier or later Mastodon version do not have this issue.

This PR removes the duplicate index if it is present.
main
Claire 3 years ago committed by GitHub
parent 3a103cd317
commit 96f0b33c8b
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23

@ -0,0 +1,9 @@
class RemoveMentionsStatusIdIndex < ActiveRecord::Migration[6.1]
def up
remove_index :mentions, name: :mentions_status_id_index if index_exists?(:mentions, :status_id, name: :mentions_status_id_index)
end
def down
# As this index should not exist and is a duplicate of another index, do not re-create it
end
end
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