如何在 Laravel 5.0 中关联两个表

Question

在一个小例子中，我有 3 个表（其中 2 个很重要）。 我的表是 PRODUCT、TRANSFER、WAREHOUSE

我想将产品从 1 个仓库转移到另一个仓库，显然这种转移必须在 TRANSFER TABLE 中，我的示例模型可能是下一个。

HERE THE ENTITY - RELATION - MODEL

现在我正在使用 Laravel 5.0 当我创建模型时，我正在这样做，使用 TRANSFER 模型：

<?php namespace Sicem;

使用 Illuminate\Database\Eloquent\Model；

类 TRANSFER 扩展模型{

/**
 * 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!

}

现在，我的问题在我的 WAREHOUSE 模型中，我不知道该放什么：

<?php namespace Sicem;

使用 Illuminate\Database\Eloquent\Model；

类 WAREHOUSE 扩展模型{

/**
 * 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???????????

}

SIEM：是我的项目名称

请帮帮我。

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'];

}

所以你需要做这样的事情：

$warehouseFrom = Warehouse::find(1);
$warehouseTo = Warehouse::find(2);
$product = Product::find(23);
$product->transfer($warehouseFrom->id, $warehouseTo->id);