demarches-normaliennes/db/migrate/20210722133553_add_unique_index_to_etablissement.rb

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class AddUniqueIndexToEtablissement < ActiveRecord::Migration[6.1]
include Database::MigrationHelpers
disable_ddl_transaction!
def up
delete_duplicates :etablissements, [:dossier_id]
remove_index :etablissements, [:dossier_id]
add_concurrent_index :etablissements, [:dossier_id], unique: true
end
def down
remove_index :etablissements, [:dossier_id]
add_concurrent_index :etablissements, [:dossier_id]
end
end