Inserting data to related models - laravel

Question

How to add a new data into related table ? I have two tables, the first is Edisi (Edition in English) table and Jurnal (Journal in English) table. The edisi table will contains many jurnal data, or in English the Edition table will contain many Journals data. My question is, how is the method create and save would look like ? I have created the function but it's not working.
Edisi table :
class CreateTableEdisi extends Migration
{
public function up()
{
Schema::create('edisi', function (Blueprint $table) {
$table->increments('id');
$table->string('judul')->unique();
$table->text('cover')->nullable();
$table->timestamps();
});
//Set FK di kolom id_edisi di table Jurnal
Schema::table('jurnal', function(Blueprint $table) {
$table->foreign('id_edisi')->references('id')->on('edisi')->onDelete('cascade')->onUpdate('cascade');
});
}
public function down()
{
Schema::table('jurnal', function(Blueprint $table) {
$table->dropForeign('jurnal_id_edisi_foreign');
});
Schema::drop('edisi');
}
}
Jurnal table :
class CreateTableJurnal extends Migration
{
public function up()
{
Schema::create('jurnal', function (Blueprint $table) {
$table->increments('id');
$table->string('judul', 200);
$table->string('penulis');
$table->text('abstrak');
$table->text('file');
$table->integer('id_edisi')->unsigned();
$table->timestamps();
});
}
public function down()
{
Schema::drop('jurnal');
}
}
Controller :
public function create()
{
return view('jurnal/create');
}
public function store(JurnalRequest $request)
{
$input = $request->all();
//Input PDF
if ($request->hasFile('file')) {
$input['file'] = $this->uploadPDF($request);
}
//Insert data jurnal
$jurnal = Jurnal::create($input);
return redirect('jurnal');
}
Show View :
#extends('template')
#section('main')
<div class="container sitecontainer single-wrapper bgw">
<div class="row">
<div class="col-md-12 col-sm-12 col-xs-12 m22">
<div class="widget searchwidget joblist">
<div class="large-widget m30">
<div class="post row clearfix">
<div class="col-md-4">
<div class="post-media">
<img alt="" src="{{ asset('fotoupload/' . $edisi->cover) }}" class="img-responsive">
<a class="btn btn-primary btn-block">{{ $edisi->judul }}</a>
</div>
</div>
<div class="col-md-8">
<div id="siswa">
<h2>Daftar Jurnal</h2>
#if (count($jurnal_list) > 0)
<table class="table">
<thead>
<tr>
<th>Judul</th>
<th>Penulis</th>
<th>Action</th>
</tr>
</thead>
<tbody>
<?php foreach ($jurnal_list as $jurnal): ?>
<tr>
<td>{{ $jurnal->judul }}</td>
<td>{{ $jurnal->penulis }}</td>
<td>
<div class="box-button">
{{ link_to('jurnal/' . $jurnal->id, 'Detail', ['class' => 'btn btn-success btn-sm']) }}
</div>
<div class="box-button">
{{ link_to('jurnal/' . $jurnal->id . '/edit', 'Edit', ['class' => 'btn btn-warning btn-sm']) }}
</div>
<div class="box-button">
{!! Form::open(['method' => 'DELETE', 'action' => ['JurnalController#destroy', $jurnal->id]]) !!}
{!! Form::submit('Delete', ['class' => 'btn btn-danger btn-sm']) !!}
{!! Form::close() !!}
</div>
</td>
</tr>
<?php endforeach ?>
</tbody>
</table>
#else
<p>No Journals yet.</p>
#endif
<div class="tombol-nav">
Add new Journal to this edition
</div>
</div> <!-- / #jurnal -->
</div>
</div><!-- end post -->
</div><!-- end large-widget -->
</div><!-- end widget -->
</div><!-- end col -->
</div><!-- end row -->
</div><!-- end container -->
#stop
I'm new to Laravel and I'm stuck here. I tried everything I could (look at the controller) and when I try to add the journal data in the selected edition, it shows me error Constrains Fails. Thanks for your help!

Answer 1

First change $table->integer('id_edisi')->unsigned(); on your "jurnal" table to $table->integer('edisi_id')->unsigned();
Then add following method to "Jurnal" model
public function edisi()
{
return $this->belongsTo('App\Edisi');
}
if you don't like to change jurnal table as I showed earlier, modify above method as follows
public function edisi()
{
return $this->belongsTo('App\Edisi', 'id_edisi');
}
Then in controller
$jurnal_list = Jurnal::with('edisi')->get();
If you want to access "jurnal" from "edisi" add following method to the "Edisi" model
public function jurnals()
{
return $this->hasMany('App\Jurnal');
}
or for unmodified jurnals table.
public function jurnals()
{
return $this->hasMany('App\Jurnal', 'id_edisi');
}
Then in controller
$jurnal_list = Edisi::with('jurnals')->get();
Note: make sure to add $table variable to "Jurnal" and "Edisi" models, because normally table name needs be like s(ex:- Model: Post Table: posts, Model: Comment Table: comments)