|
class MakeSiteSettingsUnique < ActiveRecord::Migration[5.2]
|
|
def up
|
|
execute <<~SQL
|
|
DELETE
|
|
FROM site_settings a USING site_settings b
|
|
WHERE a.id < b.id AND a.name = b.name
|
|
SQL
|
|
|
|
add_index :site_settings, [:name], unique: true
|
|
end
|
|
|
|
def down
|
|
remove_index :site_settings, [:name]
|
|
end
|
|
end
|