How to relate two tables in Laravel 5.0 - laravel

Question

In a little example, I have 3 tables (2 of them are important).
My tables are PRODUCT, TRANSFER, WAREHOUSE
I want to transfer the PRODUCT from 1 WAREHOUSE to another and obviously this transfer has to be in the TRANSFER TABLE, My example model could be the next.
HERE THE ENTITY - RELATION - MODEL
Now I'm Using Laravel 5.0
And when I create the models im doing this, with TRANSFER model:
<?php namespace Sicem;
use Illuminate\Database\Eloquent\Model;
class TRANSFER extends Model{
/**
* The database table used by the model.
*
* #var string
*/
protected $table = 'TRANSFER';
/**
* The attributes that are mass assignable.
*
* #var array
*/
protected $fillable = ['id','ware_ori_id','ware_end_id','product_id'];
public function product(){
return $this->belongsTo('Sicem\Product');
}//THIS IS OK!
public function sourceware(){
return $this->belongsTo('Sicem\Warehouse\ware_ori_id');
}//I THINK THIS IS OK!
public function endware(){
return $this->belongsTo('Sicem\Warehouse\ware_end_id');
}//I THINK THIS IS OK!
}
Now, My question is here in my WAREHOUSE model, I don't what can I put:
<?php namespace Sicem;
use Illuminate\Database\Eloquent\Model;
class WAREHOUSE extends Model{
/**
* The database table used by the model.
*
* #var string
*/
protected $table = 'WAREHOUSE';
/**
* The attributes that are mass assignable.
*
* #var array
*/
protected $fillable = ['id','name'];
public function transfer(){
return $this->hasMany('Sicem\TRANSFER');
}//I supose this.
//But is or not necesary to have 2(two) functions for the relation in my TRANSFER model???????????
}
SICEM: is my project name
Please Help me.

Answer 1

class Product {
protected $table = 'PRODUCT';
protected $fillable = ['name'];
public function transfers()
{
return $this->hasMany(Transfer::class);
}
public function transfer($warehouse_from_id, $warehouse_to_id)
{
return Transfer::create([
'product_id' => $this->id,
]);
}
}
class Transfer {
protected $table = 'TRANSFER';
protected $filalble = ['ware_ori_id', 'ware_end_id', 'product_id'];
public function warehouse_from()
{
retrun $this->belongsTo(Warehouse::class);
}
public function warehouse_to()
{
return $this->belongsTo(Warehouse::class);
}
public function product()
{
return $this->belongsTo(Product::class);
}
}
class Warehouse {
protected $table = 'WAREHOUSE';
protected $fillable = ['name'];
}
So you need to do something like this:
$warehouseFrom = Warehouse::find(1);
$warehouseTo = Warehouse::find(2);
$product = Product::find(23);
$product->transfer($warehouseFrom->id, $warehouseTo->id);