got error when show data from other table laravel 5.2 - php

Question

i have 2 tables.
users (name, username, email, password, remember_token)
dosen (iddosen, namedosen, address, phonenumber)
i want to show data from 2 tables in 1 view.
my User model :
public function profildosen()
{
return $this->belongsTo('App\Dosen');
}
Dosen model :
public function user()
{
return $this->hasOne('App\User');
}
view :
#foreach($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
method :
$dosen = User::paginate(5);
return view('admin/dosen.index', compact('dosen'));
and got error :
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)
what is the right method ?
UPDATE
Scheme Database
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();
});
Route :
Route::resource('/admin/dosen', 'AdminController',
['except' => ['show']]);
Controller :
<?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!');
}
}
And my View :
#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">×</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');
}
}
User Model :
<?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

From Laravel Docs
Eloquent determines the default foreign key name by examining the name
of the relationship method and suffixing the method name with _id.
Your function name is profiledosen so Laravel will assume that in your in your Dosen Table you have id field as primary identifier.
You can change it from iddosen to id only and then change your method name to
public function dosen()
{
return $this->belongsTo('App\Dosen');
}
Alternatively you can supply the custom primary key to your method like
public function profildosen()
{
return $this->belongsTo('App\Dosen', 'iddosen');
}

Answer 2

The reason is that you badly identify your table id a so instead of dosen.id you should use dosen.iddosen
So the query should be like this: select * from dosen where iddosen is null limit 1
Or you may to use Laravel Query Builder More.
But the most important thing is that you need to know on what columns you will join your tables.
Hope it will help