YAML で UNIQUE INDEX
uniqueConstraints をつかう。
Crocos\HogeBundle\Entity\Fuga: repositoryClass: Crocos\HogeBundle\Entity\FugaRepository type: entity table: hoge_fuga fields: hoge_id: id: true type: integer hoge_key: type: string length: 255 value: type: text uniqueConstraints: hoge_id_hoge_key: columns: [ hoge_id, hoge_key ]