为 hasMany 关系从另一个表插入 id - laravel

Question

数据库由两个表组成； 1 个名为 project 的表和 1 个名为 tasks 的表。 一个项目可以有多个任务。 使用多选下拉菜单，可以选择多个元素（用户）并通过数组发送到数据库。

用户的插入工作正常，但项目 ID 插入工作不正常。插入“null”而不是引用项目的 id。

我找不到丢失的东西。感谢您的帮助。

输出：

   array:2 [▼
    0 => array:2 [▼
          "project_id" => null
          "user" => "Jan"
        ]
    1 => array:2 [▼
          "project_id" => null
          "user" => "Piet"
        ]
  ]

项目表

        +----+------+------+-----------------+
        | id | Name | Time |      What       |
        +----+------+------+-----------------+
        | 1  | Test |  123 | Testing project |
        |  2 | Tell |    2 | Knowing project |
        |  3 | Pet  |    5 | Telling pets    |
        +----+------+------+-----------------+

任务表

        +----+------+-----------+
        | id | user | poject_id |
        +----+------+-----------+
        |  1 | Jan  |   1       |
        |  2 | Piet |   1       |
        |  3 | Tom  |   2       |
        +----+------+-----------+

项目.php

public function tasks()
{
    return $this->hasMany('App\Taks', 'project_id');
}

任务.php

public function project()
{

    return $this->belongsTo('App\Project', 'id', 'project_id');
}

ProjectTasksController.php

public function store(Request $request)
{
    $task = new Task();
    $data = $request->all();

    foreach ($request->get('user') as $user){
        $users[] = [
            'project_id' => $request->project_id,
            'user' => $user
        ];
}
dd($users);

show.blade.php

<form action="/projects/{{$project->id}}/tasks" method="post" >
@csrf
<div class="form-group">
    <label for="user">New User</label>
    <select multiple class="form-control" id="multiSelect" name="user[]">
        <option>Jan</option>
        <option>Piet</option>
        <option>Nele</option>
        <option>Tom</option>
        <option>Tony</option>
    </select>
</div>
<div class="form-group">
    <button type="submit" class="btn btn-primary">New user</button>
</div>
</form>

结果 dd($request->all());

array:2 [▼
  "_token" => "xxxx"
  "user" => array:2 [▼
    0 => "Jan"
    1 => "Piet"
  ]
]

web.php

Route::post('/projects/{project}/tasks',    'ProjectTasksController@store');

Answer 1

您正在通过表单操作 URL 发送项目 ID，您需要在控制器的方法中捕获它。

public function store(Request $request, $projectID)
{
    $task = new Task();
    $data = $request->all();

    foreach ($request->get('user') as $user){
        $users[] = [
            'project_id' => $projectID,
            'user' => $user
        ];
}

在web.php中，需要添加项目ID参数。

请在下拉列表中添加一个值。

<form action="/projects/{{$project->id}}/tasks" method="post" >
@csrf
<div class="form-group">
    <label for="user">New User</label>
    <select multiple class="form-control" id="multiSelect" name="user[]">
        <option value="Jan">Jan</option>
        <option value="Piet">Piet</option>
        <option value="Nele">Nele</option>
        <option value="Tom">Tom</option>
        <option value="Tony">Tony</option>
    </select>
</div>
<div class="form-group">
    <button type="submit" class="btn btn-primary">New user</button>
</div>
</form>

Answer 2

将关系方法替换为以下：

Task.php

public function project()
{
    return $this->belongsTo('App\Project', 'id', 'project_id');
}

项目模型中的错字：

Project.php

public function tasks()
{
    return $this->hasMany('App\Task', 'project_id');
}

ProjectTasksController.php

public function store(Request $request, $project)
{
$task = new Task();
$data = $request->all();

foreach ($request->get('user') as $user){
    $users[] = [
        'project_id' => $project,
        'user' => $user
    ];
}
dd($users);

Answer 3

感谢@Nagesh 和@Jinal 的输入，我解决了这个问题。 使用路由模型绑定并使用 store 函数提供 id 以及代码：

    public function store(Request $request, Event $event)
{
    $location = new Location();
    $data = $request->all();

    foreach ($request->get('location_name') as $name){
        $names[] = [
            'event_id' => $event->id,
            'location_name' => $name
        ];
    }

    dd($names);