3个不同表之间的Laravel关系

Question

试图弄清楚以下内容：

1. 如何设置这些表。
2. 表之间的关系使用eloquent。

基本上，您可以创建与任务相关的帖子。每个任务都可以有需要用户输入的独特细节。

表格（一种方法）

Schema::create('uniqueTopic1', function (Blueprint $table) {
$table->increments('id');
$table->unsignedInteger('post_id');
$table->foreign('post_id')
      ->references('id')
      ->on('posts')
      ->onDelete('cascade');
$table->string('uniqueDetails1');
$table->string('uniqueDetails2');
$table->string('uniqueDetails3');
$table->string('uniqueDetails4');
$table->string('uniqueDetails5');
$table->string('uniqueDetails6');
$table->string('title');
$table->string('description');
$table->string('mission');
$table->int('money');
$table->timestamps();
});

Schema::create('uniqueTopic2', function (Blueprint $table) {
    $table->increments('id');
    $table->unsignedInteger('post_id');
    $table->foreign('post_id')
          ->references('id')
          ->on('posts')
          ->onDelete('cascade');
    $table->string('uniqueDetails1');
    $table->string('uniqueDetails2');
    $table->string('uniqueDetails3');
    $table->int('level');
    $table->timestamps();
});

Schema::create('posts', function (Blueprint $table) {
    $table->increments('id');
    $table->string('title');
    $table->timestamps();
});

现在我想以一种我可以发展它的方式来设置它。当我向站点添加更多任务时，我可以动态地扩展它。这就是为什么我正在考虑一个引用任务表的帖子表，然后可以进入该特定任务的详细信息表？

首先，这是正确的设置方式吗？

其次，我将如何使用 eloquent 将它们联系在一起？多对多通过？数据透视表。这是针对 API 的，因此能够构建 JSON 对象很重要……这不仅仅是传递给视图或类似的东西……

Answer 1

数据库方案

Schema::create('tasks', function (Blueprint $table) {
    $table->increments('id');
    $table->string('title');
    $table->timestamps();
});

Schema::create('sub_tasks', function (Blueprint $table) {
    $table->increments('id');
    $table->string('title');
    $table->string('description');
    $table->unsignedInteger('task_id');
    $table->foreign('task_id')
          ->references('id')
          ->on('tasks')
          ->onDelete('cascade');
    $table->timestamps();
});

Schema::create('posts', function (Blueprint $table) {
    $table->increments('id');
    $table->string('title');
    $table->unsignedInteger('task_id');
    $table->foreign('task_id')
          ->references('id')
          ->on('tasks')
          ->onDelete('cascade');
    $table->timestamps();
});

示例代码

$task1 = Task::create(['title' => 'Market Shopping']);
$task2 = Task::create(['title' => 'Spring Cleaning']);

// Subtask for Task1
$task1->subTasks()->create([
    'title'       => 'Buy shampoo',
    'description' => 'Around 3 bottles will be good'
]);

$task1->subTasks()->create([
    'title'       => 'Buy donuts',
    'description' => 'I love the sprinkled ones!'
]);

// Subtask for Task2
$task2->subTasks()->create([
    'title'       => 'Recycle old bottles',
    'description' => 'They are in the garage'
]);

$task2->subTasks()->create([
    'title'       => 'Wash car',
    'description' => 'Do not forget the back seat'
]);

Answer 2

@dov

所以如果我扩展了你的想法，我最终会得到这个......不是吗？抱歉，它仍然没有为我点击我将如何完成这项工作。道歉。我最终会得到如下条目：

子任务 1 和子任务 2 的数据库条目

1 | 1 | x | y | z | NULL | NULL | NULL | NULL | NULL | timestamps
2 | 2 | NULL | NULL | NULL | a | b | c | d | timestamps

表格：

Schema::create('tasks', function (Blueprint $table) {
    $table->increments('id');
    $table->string('title');
    $table->timestamps();
});

Schema::create('sub_tasks', function (Blueprint $table) {
    $table->increments('id');
    $table->unsignedInteger('task_id');
    $table->foreign('task_id')
          ->references('id')
          ->on('tasks')
          ->onDelete('cascade');
    $table->string('task1 specific input1');
    $table->string('task1 specific input2');
    $table->string('task1 specific input3');
    $table->string('task2 specific input1');
    $table->string('task2 specific input2');
    $table->string('task2 specific input3');
    $table->string('task2 specific input4');
    $table->string('task2 specific input5');
    $table->timestamps();
});

Schema::create('posts', function (Blueprint $table) {
    $table->increments('id');
    $table->string('title');
    $table->unsignedInteger('task_id');
    $table->foreign('task_id')
          ->references('id')
          ->on('tasks')
          ->onDelete('cascade');
    $table->timestamps();
});