Question

我有两张桌子。

用户（姓名，用户名，电子邮件，密码，remember_token）
dosen（iddosen，namedosen，address，phonenumber）

我想在1个视图中显示来自2个表的数据。

我的用户模型：

public function profildosen()
{
    return $this->belongsTo('App\Dosen');
}

Dosen模型：

public function user()
{
    return $this->hasOne('App\User');
}

观点：

 @foreach($dosen as $key => $value)                 
 <strong>Kode Dosen :</strong> {{ $value->profildosen->iddosen }}<br>
 <strong>Nama  :</strong> {{ $value->profildosen->namedosen}}<br>
 <strong>Alamat :</strong> {{ $value->profildosen->address}}<br>
<strong>No HP :</strong> {{ $value->phonenumber}} <br>
 <strong>Email :</strong> {{ $value->email }}<br>
 @endforeach

方法：

 $dosen = User::paginate(5);
 return view('admin/dosen.index', compact('dosen'));

并收到错误：

SQLSTATE[42S22]: Column not found: 1054 Unknown column 'dosen.id' in 'where       clause' (SQL: select * from `dosen` where `dosen`.`id` is null limit 1) (View: D:\XAMPP\htdocs\infodosenku\resources\views\admin\dosen\index.blade.php)

什么是正确的方法？

更新

方案数据库

Schema::create('users', function (Blueprint $table) {
        $table->increments('id');
        $table->string('name');
        $table->string('username');
        $table->string('email')->unique();
        $table->string('password', 60);
        $table->boolean('admin')->default(0);
        $table->rememberToken();
        $table->timestamps();
    });

Schema::create('dosen', function (Blueprint $table) {
        $table->string('id');
        $table->string('user_id');
        $table->string('nipy');
        $table->string('namadosen');
        $table->string('alamatdosen');
        $table->integer('notelpdosen');
        $table->timestamps();
    });

路线：

Route::resource('/admin/dosen', 'AdminController',
            ['except' => ['show']]);

控制器：

<?php

namespace App\Http\Controllers;

use Illuminate\Support\Facades\Request;
use App\Http\Requests;
use App\Http\Requests\CreateDosenRequest;
use App\Dosen;
use App\User;
use Illuminate\Support\Facades\Input;
use DB;

class AdminController extends Controller
{
public function index()
{
     // ambil semua data dosen
    $dosen = User::paginate(5);
    return view('admin/dosen.index', compact('dosen'));

}

public function create()
{
    return view('admin/dosen.create');
}

public function store(CreateDosenRequest $request)
{
    $user = User::create([
        'name' => $request->input('name'),
        'username' => $request->input('username'),
        'email' => $request->input('email'),
        'password' => bcrypt($request->input['password']),
        'admin' => $request->input('admin')
    ]);




      $dosen = Dosen::create([
        'id' => $request->input('iddosen'),
        'nipy' => $request->input('nipy'),
        'namadosen' => $user->name,
        'user_id' => $user->id,
        'alamatdosen' => $request->input('alamatdosen'),
        'notelpdosen' => $request->input('notelpdosen'),
    ]);


    return redirect('admin/dosen')->with('message', 'Data berhasil ditambahkan!');              
}

public function show($id)
{
    $dosen = User::find($id);
    return view('admin/dosen/show', compact('dosen'));
}

public function edit($id)
{
    $dosen = User::find($id);

    return view('admin.dosen.edit', compact('dosen'));
}

public function update($id)
{
    $dosenUpdate = Request::all();
    $dosen = User::find($id);
    $dosen->update($dosenUpdate);
    return redirect('admin.dosen')->with('message', 'Data berhasil diubah!');
}

public function destroy($id)
{       
    User::find($id)->delete();
    return redirect('admin.dosen')->with('message', 'Data berhasil dihapus!');
}   
}

我的观点：

@extends('layouts.app')
@section('content')
<div class="container">
    <div class="row">
       <div class="col-md-10 col-md-offset-1">
        <div class="panel panel-default">
            <div class="panel-heading">Daftar Dosen</div>
                <div class="panel-body">
                <form class ="form-inline" action="{{ URL('/dosen/hasil/') }}" action="GET">
                        <div class="form-group">
                            <label for="cari">Cari Dosen </label>
                            <input type="text" class="form-control" id="cari" name="cari" placeholder="Masukan Nama Dosen">
                        </div>
                            <input class="btn btn-primary" type="submit" value="Cari">

                    </form><br>
                  <table class="table table-striped table-bordered">
                            <thead>
                                <tr>

                                    <td>Nama</td>
                                    <td>username</td>

                                    <td>Actions</td>
                                </tr>
                            </thead>
                        <tbody>
            @foreach($dosen as $key => $value)
                    <tr>

                        <td>{{ $value->name }}</td>
                        <td>{{ $value->username}}</td>


                         <td>
                            {!! Form::open(['url' => 'dosen/' . $value->id . '/edit', 'style'=>'display:inline-block']) !!}
                            {!! Form::hidden('_method', 'GET') !!}
                            {{ Form::button('<i class="fa fa-pencil-square-o"></i>', ['type' => 'submit', 'class' => 'btn btn-warning', 'title' => 'Ubah'] )  }}
                            {!! Form::close() !!}

                          <button title="Tampilkan" type="button" class="btn btn-success" data-toggle="modal" data-target="#myModal-{{ $value->id }}"><i class="fa fa-share"></i></button>

                          <!-- Modal -->
                          <div class="modal fade" id="myModal-{{ $value->id }}" role="dialog">
                            <div class="modal-dialog modal-sm">
                              <div class="modal-content">
                                <div class="modal-header">
                                  <button type="button" class="close" data-dismiss="modal">&times;</button>
                                  <h4 class="modal-title">{{ $value->namadosen }}</h4>
                                </div>
                                <div class="modal-body" style="overflow:auto;">             
                                        <strong>Kode Dosen :</strong> {{ $value->dosen->id }}<br>
                                         <strong>NIP/NIPY :</strong> {{ $value->nipy }}<br>
                                         <strong>Nama  :</strong> {{ $value->namadosen }}<br>
                                         <strong>Alamat :</strong> {{ $value->alamatdosen }}<br>
                                         <strong>No HP :</strong> {{ $value->notelpdosen }} <br>

                                </div>
                                <div class="modal-footer">
                                  <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
                                </div>
                              </div>
                            </div>
                          </div>
                            {!! Form::open(['url' => 'dosen/' . $value->id, 'style'=>'display:inline-block']) !!}
                            {!! Form::hidden('_method', 'DELETE') !!}
                            {{ Form::button('<i class="fa fa-trash"></i>', ['type' => 'submit', 'class' => 'btn btn-danger', 'title' => 'Hapus'] )  }}
                            {!! Form::close() !!}
                             {!! Form::model($value, ['route' => ['admin.dosen.update', $value->id], 'method' => 'PUT']) !!}
                        </td>
                    </tr>
            @endforeach
                    </tbody>
                </table>
                 <h5><span class="label label-default">
                Showing {!! $dosen->count() !!} results from total {!! $dosen->total() !!} results.
                </span></h5>
            <div> {!! $dosen->links() !!} </div>
         </div>
      </div>
    </div>
  </div>
</div>
@endsection

Dosen Model：

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Dosen extends Model
{
 protected $table = 'dosen';

protected $fillable = ['iddosen', 'namadosen', 'user_id', 'nipy', 'kodeprogdidosen','alamatdosen', 'notelpdosen', 'tempatlahirdosen', 'tanggallahirdosen', 'agamadosen', 'emaildosen', 'sandidosen', 'jkldosen', 'fotodosen'];

protected $casts = [
'iddosen' => 'varchar',
];

public function dosen()
{
     return $this->belongsTo('App\Dosen');
}
}

用户模型：

<?php
 namespace App;
 use Illuminate\Foundation\Auth\User as Authenticatable;

class User extends Authenticatable
{
/**
 * The attributes that are mass assignable.
 *
 * @var array
 */
protected $fillable = [
    'name', 'username', 'email', 'password', 'admin',
];

/**
 * The attributes excluded from the model's JSON form.
 *
 * @var array
 */
protected $hidden = [
    'password', 'remember_token',
];

 public function profildosen()
{
    return $this->belongsTo('App\Dosen');
}
}

Answer 1

原因是您严重识别了您的表格ID，而不是 dosen.id 您应该使用 dosen.iddosen
所以查询应该是这样的：select * from dosen where iddosen is null limit 1
或者您可以使用Laravel Query Builder More 但最重要的是你需要知道你将加入你的牌桌的哪些栏目希望它会有所帮助

Answer 2

来自Laravel Docs

Eloquent通过检查名称来确定默认外键名称关系方法和后缀方法名称与_id。

您的函数名称为profiledosen，因此Laravel将假设您在Dosen Table中的id字段作为主要标识符。

您只能将其从iddosen更改为id，然后将您的方法名称更改为

public function dosen()
{
    return $this->belongsTo('App\Dosen');
}

或者，您可以为方法提供自定义主键，例如

public function profildosen()
{
    return $this->belongsTo('App\Dosen', 'iddosen');
}

从其他表格laravel 5.2显示数据时出错

2 个答案: