Laravel 5.4 采摘,在哪里

Laravel 5.4 pluck, where

我正在研究无线电新闻广播的分配系统。试图 return 查看特定新闻广播的所有作业,但我受阻了。

表格
用户 table

 id | name
 ---|-------
  1 | Admin
  2 | Susan
  3 | Ed
  4 | Jen

新闻广播table

 id | forStation_id | name
 ---|---------------|-----
  1 |       1       | AM
  2 |       1       | PM
  3 |       2       | Sports

站table

 id | calls
 ---| -----
  1 | JNDV
  2 | YXWQ

作业table

 id | anchorId | newscastId |  startDate  |   endDate   | isTemp
 ---|----------|------------|-------------|-------------|--------
  1 |     2    |     1      | 01 May 2017 | 31 Dec 2999 |
  2 |     3    |     1      | 02 May 2017 | 06 May 2017 |  True
  3 |     4    |     2      | 01 Apr 2017 | 31 Dec 2999 |
  4 |     3    |     3      | 01 Apr 2017 | 28 Apr 2017 |

(部分)分配模型

public function anchor()
{
    return $this->belongsTo(User::class, 'anchor_id')->withTrashed();
}

public function cast()
{
    return $this->belongsTo(Newscast::class, 'cast_id')->withTrashed();
}

(部分)新闻广播模型

public function for_station()
{
    return $this->belongsTo(Station::class, 'for_station_id')->withTrashed();
}

function getNameInputStationAttribute() {
    return $this->for_station->calls . "-" . $this->name_input;
}

(部分)赋值控制器

/**
 * Display all Assignments for one input name.
 *
 * @param  int  $name
 * @return \Illuminate\Http\Response
 */
public function showAssignmentsByCastName($castName)
{
    if (! Gate::allows('assignment_view')) {
        return abort(403);
    }
    $relations = [
        'anchors' => \App\User::get()->pluck('name', 'id'),
        'casts' =>  \App\Newscast::with('for_station')->get()->pluck('name_input_station', 'id'),
        'assignments' => \App\Assignment::with('cast')->get(),
    ];

dump($relations);

return view('assign.list', compact('castName') +$relations);
}

如我所料,此代码 return 是 assignments 的完整集合。

输出

  Anchor  | Cast Name   | Start Date  |   End Date
 ---------|-------------|-------------|-------------
  Susan   | JNDV-AM     | 01 May 2017 | 31 Dec 2999
  Ed      | JNDV-AM     | 02 May 2017 | 06 May 2017
  Jen     | JNDV-PM     | 01 Apr 2017 | 31 Dec 2999
  Ed      | YXWQ-Sports | 01 Apr 2017 | 28 Apr 2017

我尝试了几种方法来将作业限制为只有一个 newscastId,但到目前为止都没有成功。

2017 年 5 月 1 日 /assignment/list/JNDV-AM 的预期输出

  Anchor  | Cast Name   | Start Date  |   End Date
 ---------|-------------|-------------|-------------
  Susan   | JNDV-AM     | 01 May 2017 | 31 Dec 2999
  Ed      | JNDV-AM     | 02 May 2017 | 06 May 2017

短期分配是临时分配 (isTemp=True)。在有效的日子里,它应该列在最前面。

2017 年 5 月 2 日至 2017 年 5 月 6 日 /assignment/list/JNDV-AM 的预期输出

  Anchor  | Cast Name   | Start Date  |   End Date
 ---------|-------------|-------------|-------------
  Ed      | JNDV-AM     | 02 May 2017 | 06 May 2017
  Susan   | JNDV-AM     | 01 May 2017 | 31 Dec 2999

我正在修改由管理面板生成器工具生成的代码。在我看来,查询所有用户和所有演员并不是最有效的方法。我想,因为我只是在寻找一个新闻广播的当前和未来分配,所以应该过滤 anchorscasts 关系。

基本问题 我应该对
做哪些改变 'assignments' => \App\Assignment::with('cast')->get(),
仅获取 JNDV-AM (newscastId = 1) 的作业?

高级问题 您如何建议将 relations 更改为 return 仅 JNDV-AM 当前和未来的作业,首先是今天的作业,尽可能少的查询?

您可以将一个函数传递到您的 with 语句中:

'assignments' => \App\Assignment::with(['cast' => function ($query) {
    $query->where('newscastId', '=', 1);
}])->get()

这是我想出的工作代码:

(部分)分配控制器

public function showAssignmentsByCastName($calls, $name_input)
{
    if (!Gate::allows('assignment_view')) {
        return abort(403);
    }

    $castName = strtoupper($calls). "-" . $name_input;
    $station_id = \App\Station::where('calls', $calls)->get();
    $station = \App\Station::findOrFail($station_id);

    $cast_id = \App\Newscast::where([
        ['for_station_id', $station->id],
        ['name_input', $name_input]
    ])->get();
    $cast = \App\Newscast::findOrFail($cast_id);

    $relations = [
        'anchors' => \App\User::get()->pluck('name', 'id'),
        'casts' => \App\Newscast::where('cast_id', $cast->id),
        'assignments' => \App\Assignment::where('cast_id', $cast->id)->get(),
    ];
    return view('assign.list', compact('castName') + $relations);
}

网络路由

Route::get('assign/{calls}-{name_input}', 'AssignmentsController@showAssignmentsByCastName')->name('assign.list');