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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.
gh/stable
Claire 2022-01-23 13:53:58 +01:00 committed by GitHub
parent 3a103cd317
commit 96f0b33c8b
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1 changed files with 9 additions and 0 deletions
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db/migrate/20220105163928_remove_mentions_status_id_index.rb 100644
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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