Laravel: editing two tables - laravel

Question

I'm wondering how would it be possible to edit two tables at the same view.
I've got 2 models which are related to eachother.
In my view I'm trying to repopulate my Form select with already inserted value in order to alter it.
Models
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Products extends Model
{
protected $table = 'products';
public $primaryKey = 'id';
public $timestamps = true;
public function user()
{
return $this->belongsTo('App\User');
}
public function material()
{
return $this->belongsTo('App\Material');
}
}
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Material extends Model
{
protected $table = 'material';
public $primaryKey = 'id';
public $timestamps = true;
function products(){
return $this->hasMany('App\Products');
}
}
Controller
public function edit($id)
{
$product = Products::find($id);
return view('products.edit')->with('product', $product);
}
View(products.edit)
#extends('layouts.app')
#include('inc.messages')
#section('content')
<div class="container">
<h1>Edit</h1>
{!! Form::open(['action' => ['ProductsController#update', $product->id], 'method' => 'POST']) !!}
<div class="form-group">
{{Form::label('title', 'Title')}}
{{Form::text('title', $product->title, ['class' => 'form-control', 'placeholder' => 'Title'])}}
</div>
<div class="form-group">
{{Form::label('body', 'Body')}}
{{Form::textarea('body', $product->body, ['class' => 'form-control', 'placeholder' => 'Body text'])}}
</div>
<div class="form-group">
{!! Form::label('material', 'Material') !!}
{!! Form::select('material',dd($Materials), ['class' => 'form-control']) !!}
</div>
{{Form::hidden('_method','PUT')}}
{{Form::submit('Submit',['class' => 'btn btn-primary'] )}}
{!! Form::close() !!}
</div>
#endsection
Error output
Invalid argument supplied for foreach() (View: C:\xampp\htdocs\material\resources\views\products\edit.blade.php)

Answer 1

In order to repopulate a select box in Laravel you need to have possible options that a user can select and then make a select box like this:
<div class="form-group">
{!! Form::label('material', 'Material') !!}
{!! Form::select('material', ['option1', 'option2', 'option3'], null, ['class' => 'form-control']) !!}
</div>
And that option 1,2,3 array can also be called from a database.
P.S. you should use {!! !!} endings instead of {{ }} for {!! Form !!} facade.
update
in order to have the options of select box from database you need to use pluck() to get them.
Make a new function in your controller:
public function materials()
{
return DB::table('your_table')->pluck('name', 'id');
// or this ↓
return ModelName::pluck('name', 'id');
}
and then in your create and edit functions pass it through like this:
public function create($id)
{
$product = Products::find($id);
$theMaterials = $this->materials();
return view('products.create')->with('product', $product, 'materials', $materials);
}
public function edit($id)
{
$product = Products::find($id);
$theMaterials = $this->materials();
return view('products.edit')->with('product', $product, 'materials', $materials);
}
update
{!! Form::model($product, ['method' => 'PATCH', 'action' => ['ProductController#update', $product->id]]) !!}