Laravel 5.2 belongstoMany in views

Question

我正在尝试在 Laravel 5.2.39 中建立人与地点之间的 belongstoMany 关系，但无法将信息传递到 select 框中的视图中。我刚得到："Error Exception: Undefined variable: people"。它也没有保存和制作枢轴 table 条目。

我用 'place_id' 和 'person_id' 列创建了枢轴 table person_place，它们对应于 'people' 和 'places' table.

App/Person.php（人物模型）

<?php
namespace ss;
use ss\Place;

use Illuminate\Database\Eloquent\Model;

class Person extends Model
{
    /**
     * Fillable fields
     * 
     * @var array
     */
    protected $fillable = [
        'name',
        'type',
        'status',
        'notes',
        'email',
        'phone',
        'alt',
        'web',
        'first',
        'last',
        'title',
    ];

    public function places()
    {
        return $this->belongsToMany('Place');
    }
}

App/Place.php（放置模型）

<?php
namespace ss;
use ss\Person;

use Illuminate\Database\Eloquent\Model;

class Place extends Model
{
    /**
     * Fillable fields
     * 
     * @var array
     */
    protected $fillable = [
        'name',
        'type',
        'status',
        'notes',
        'email',
        'phone',
        'alt',
        'web',
        'address1',
        'address2',
        'city',
        'state',
        'zip',
        'country',
    ];

    public function people()
    {
        return $this->belongsToMany('Person');
    }

}

App/Http/Controllers/PlaceController.php（位置控制器）

 <?php namespace ss\Http\Controllers;
use ss\Place;
use ss\Person;
use ss\Http\Requests;
use Illuminate\Http\Request;
use View;
use Session;

class PlaceController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return Response
     */
    public function index()
    {
        $places = Place::all();
        $people = Person::pluck('name','id')->all();

        return View::make('places.index', compact('places','people'));
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return Response
     */
    public function create()
    {
        $people = Person::lists('last', 'id');

        return view('places.create', compact('people'));
    }

    /**
     * Store a newly created resource in storage.
     *
     * @return Response
     */
    public function store(Request $request)
    {
        $this->validate($request, [
            'name' => 'required'
        ]);

        $input = $request->all();
        Place::create($input);

        Session::flash('flash_message', 'Place successfully added!');
        return redirect()->action('PlaceController@index');
    }

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return Response
     */
    public function show($id)
    {
        $place = Place::findOrFail($id);
        return view('places.show')->withPlace($place);
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  int  $id
     * @return Response
     */
    public function edit($id)
    {
        $place = Place::findOrFail($id);
        $people = Person::pluck('name','id')->all();

        return view('places.edit', compact('place','people'));
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  int  $id
     * @return Response
     */
    public function update($id, Request $request)
    {
        $this->validate($request, [
            'name' => 'required'
        ]);

        $input = $request->except('people');

        $place = Place::findOrFail($id);
            $peopleIDs = $this->place->people($peopleIds);

        $place->fill($input)->save();
        Session::flash('flash_message', 'Place successfully edited!');
        return redirect()->action('PlaceController@index', $place);
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  int  $id
     * @return Response
     */
    public function destroy($id)
    {
        $place = Place::findOrFail($id);
        $place->delete();

        Session::flash('flash_message', 'Place successfully deleted!');
        return redirect()->action('PlaceController@index');
    }

}

resources/views/places/edit.blade.index.php（位置视图，我正在尝试构建 select 列表 - 不工作）

@section('aside')
        {!! Form::select('people', $people, null, ['class' => '', 'multiple']) !!}

<ul class="section table-of-contents">
    <li><a href="#introduction">New Time</a></li>
    <li><a href="#structure">New Money</a></li>
    <li> </li>
    <li><a href="#initialization">New Sub-Task</a></li>
</ul>
@endsection

resources/views/places/create.blade.index.php（使用 select 列表的地方视图有效但不构成枢轴 table保存时)

@section('aside')
            {!! Form::select('people', $people, null, ['class' => '', 'multiple']) !!}
@endsection

尝试了"with"和"attach"的各种方法，都没有结果。有趣的是，即使我特别放置 "$person = "foo"; 在我的编辑方法中它仍然说它是未定义的。

感谢您的帮助。

编辑：更新代码

Answer 1

在 PlacesController 中，您的 edit($id) 方法不会将人物数组传递给视图。

/**
 * Show the form for editing the specified resource.
 *
 * @param  int  $id
 * @return Response
 */
public function edit($id)
{
    $place = Place::findOrFail($id);
    $people = People::pluck('name','id')->all();
    return view('places.edit', compact('place', 'people');
}

Laravel 5.2 belongstoMany in views

Laravel 5.2 belongstoMany in views

php

many-to-many

laravel

eloquent

laravel-5.2