如何使用 Eloquant 插入多级条目？

Question

让我们考虑一下我有Quizzes可以包含Questions其中每个都包含一些Propositions. 因此我有三个模型：Quiz、Question和Proposition。这些命题通过包含以下内容的数据透视表链接到问题：id_question, id_proposition, is_correct。在 Seeder 中，我想插入一个虚拟测验，可以用 YAML 表示，如下所示：title: A Quizquestions:   - name: Animals    content: What's the difference between a duck?    propositions:       - text: The dog has two legs        is_correct: false      - text: One leg is both the same        is_correct: true      - text: Every duck has at least several teeth        is_correct: false传统上，在 Laravel 中，您需要拆分每个步骤，例如： $quiz = new Quiz; $quiz->name = "A Quiz"; $question = $quiz->questions()->create(); ...是否有更短的方法来分层创建一个新条目，如下所示：Quiz::create([   'name' => 'A Quiz'   'questions' => [      Question::Create([         'name' => 'Animals',         'content' => "What's the difference between a duck?"         'propositions' => [            Proposition::Create(['content' => 'The dog has two legs']),            Proposition::Create(['content' => 'One leg is both the same'])            Proposition::Create(['content' => 'Every duck has at least several teeth'])         ]      ])   ]]

Answer 1

仅使用静态值进行测试：

$quiz = Quiz::create([

    'name' => 'A quiz',

])->questions()->createMany([

    ['name' => 'animals', 'content' => 'animals content'],

    ['name' => 'fruits', 'content' => 'fruits content'],

])->map(function($value, $key){

    $value->propositions()->createMany([

        ['content' => 'content 1'],

        ['content' => 'content 2'],

    ]);

});

我认为你可以使用 foreach 根据 YAML 索引值（类似于 json）设置值