它如何与Laravel 4模型关系起作用？

Question

我想知道模型中laravel 4关系的运作方式。这个问题是因为我试图从2个表中获取关系而不是成功的行。

class Products extends Eloquent {

protected $table = "Products";
protected $primaryKey = "ProductId";

public function plandetail()
{
        return $this->belongsTo("PlanDetail", "PlanDetail.ProductId")->select( array("ProductId", "Order") );
}

public function getProductsPlan($dealerId)
{
    return $this->with( "plandetail" )->where("Products.DealerId", $dealerId)->get();
}
} // end model

// In my controller

$product = new Products();
$products = $product->getProductsPlan($id);

foreach( $products as $product )
{
     print_r($product); // prints only the rows from the Products table
                        // not the PlanDetail table.
}

在输出中只打印产品记录而不是PlanDetail表行。我是否需要在PlanDetail表中添加连接以获取这些行？

这是我现在获得的一个示例行：

Products Object ( [table:protected] => Products [primaryKey:protected] => ProductId [errors:Products:private] => [rules:Products:private] => Array ( [ProductBaseId] => required|numeric [DealerId] => required|numeric [ProductName] => required|max:255 [DisplayName] => required|max:255 [Bullets] => required [Cost] => required|numeric [SellingPrice] => required|numeric [UseWebServicePricing] => required|boolean [Term] => required|numeric [Type] => required|numeric [Deductible] => required|numeric [VehiclePlan] => required|numeric [Mileage] => required|numeric [TireRotation] => required|numeric [Interval] => required|numeric [UseRangePricing] => required|boolean [IsTaxable] => required|boolean [NotRegulated] => required|boolean [CreatedOn] => required [CreatedBy] => required [ModifiedBy] => required [ModifiedOn] => required ) [connection:protected] => [perPage:protected] => 15 [incrementing] => 1 [timestamps] => 1 [attributes:protected] => Array ( [ProductId] => 3 [ProductBaseId] => 84 [DealerId] => 50 [ProductName] => Vehicle Service Contract [DisplayName] => US Warranty Service Contract [ProductDescription] => [Bullets] => Warranty Proteccion for the covered components,Rental Car Coverage,Towling Coverage,, [Cost] => 0.0 [SellingPrice] => 0.0 [BrochureImage] => [PDFContrator] => [UseWebServicePricing] => 1 [UseManualPricing] => 0 [BrochureHeight] => 0 [BrochureWidth] => 0 [Term] => 36 [Type] => Platinum [Deductible] => 100 [VehiclePlan] => None [Mileage] => 36000 [TireRotation] => 0 [Interval] => 0 [PENProductId] => 0 [DMSProductId] => 16 [CreatedBy] => GREIVIN BRITTON [CreatedOn] => 2015-01-08 22:26:47.000 [UseRangePricing] => 0 [ModifiedBy] => GREIVIN BRITTON [ModifiedOn] => 2015-01-28 15:06:11.000 [IsTaxable] => 0 [NotRegulated] => 0 ) [original:protected] => Array ( [ProductId] => 3 [ProductBaseId] => 84 [DealerId] => 50 [ProductName] => Vehicle Service Contract [DisplayName] => US Warranty Service Contract [ProductDescription] => [Bullets] => Warranty Proteccion for the covered components,Rental Car Coverage,Towling Coverage,, [Cost] => 0.0 [SellingPrice] => 0.0 [BrochureImage] => [PDFContrator] => [UseWebServicePricing] => 1 [UseManualPricing] => 0 [BrochureHeight] => 0 [BrochureWidth] => 0 [Term] => 36 [Type] => Platinum [Deductible] => 100 [VehiclePlan] => None [Mileage] => 36000 [TireRotation] => 0 [Interval] => 0 [PENProductId] => 0 [DMSProductId] => 16 [CreatedBy] => GREIVIN BRITTON [CreatedOn] => 2015-01-08 22:26:47.000 [UseRangePricing] => 0 [ModifiedBy] => GREIVIN BRITTON [ModifiedOn] => 2015-01-28 15:06:11.000 [IsTaxable] => 0 [NotRegulated] => 0 ) [relations:protected] => Array ( [plandetail] => ) [hidden:protected] => Array ( ) [visible:protected] => Array ( ) [appends:protected] => Array ( ) [fillable:protected] => Array ( ) [guarded:protected] => Array ( [0] => * ) [dates:protected] => Array ( ) [touches:protected] => Array ( ) [observables:protected] => Array ( ) [with:protected] => Array ( ) [morphClass:protected] => [exists] => 1 [softDelete:protected] => ) 

提前致谢：）