php - laravel，已记录正常错误，但白屏只有一个错误

Question

我正在将laravel 5.4与laravel-datatables插件一起使用

我没有调试器插件和正常的幼虫日志错误的问题，但是由于某种原因，其中一个Bug根本没有显示，而laravel显示白页却没有错误:(

我相信与我的 Eloquent 关系问题相关的代码遵循以下代码产品白页错误

return Datatables::of(InvoiceProduct::where('purchasing_order_id', 1))->make(true);

仅当数据库purchase_orders不为空时，才会发生上述错误。

我还使用DB尝试获得与以下相同的结果，而没有和错误

return Datatables::of(DB::select('select * from invoice_products where purchasing_order_id = ' . $id))->make(true);

我真的需要查看错误是什么，以便我可以解决它:(

Answer 1

我发现了我的代码存在的问题，但是仍然不知道为什么500错误没有在存储/日志中登录，仍然不知道为什么是白页，并且仍然不知道如何解决。

问题是当我在保护$ with数组中删除invoice_product时，错误消失了。

这是我编辑的代码。

//protected $with = ['invoice_products', 'customer', 'currency', 'company'];
//Comment out above line, the below line is working
protected $with = ['customer', 'currency', 'company'];

我相信我的关系是错误的，但找不到问题，

这是我的“购买订单模型” Eloquent 模型代码，其中包含许多“发票产品”

class PurchasingOrder extends Model
{
    protected $table = 'purchasing_orders';
    protected $fillable = [
        'po_number', 'po_date',
        'invoice_reference', 'customer_id', 'customer_po_number', 'agent',
        'estimate_shipping_date', 'estimate_arrival_date', 'estimate_loading_date',
        'ship_to','to_user_name',
        'term', 'po_remark', 'worksheet_remark',
        'company_id','currency_id',
        'total_amount', 'total_quantity','total_net_weight','total_gross_weight','total_packed_cu_metric','total_pallets',
    ];

//Json come with product_unit and supplier that associated with prdocut
//protected $with = ['invoice_products', 'customer', 'currency', 'company'];
protected $with = ['customer', 'currency', 'company'];

 /**
 * Get the invoice_product of invoice.
 */
 //One invoice has many invoice_product
public function invoice_products()
{
    return $this->hasMany('App\InvoiceProduct');
}
 /**
 * Get the customer of invoice.
 */
 //One invoice has only one customer
public function customer()
{
    return $this->belongsTo('App\Customer', 'customer_id');
}
 /**
 * Get the currency of invoice.
 */
 //One invoice has only one currency
public function currency()
{
    return $this->belongsTo('App\Currency', 'currency_id');
}
 /**
 * Get the company of invoice.
 */
 //One invoice has only one company
public function company()
{
    return $this->belongsTo('App\Company', 'company_id');
}

这是我来自“invoice_products” Eloquent 模型的代码(属于purchase_order Eloquent模型)

    class InvoiceProduct extends Model
{
    protected $table = 'invoice_products';
    protected $fillable = [
        'product_id', 'customer_product_id','name', 'brand', 'packing',
        'gross_weight', 'net_weight','net_weight_packing',
        'product_unit_id', 'packed_cu_metric',
        'quantity','price','amount','pallets',
        'invoice_id', 'purchasing_order_id','container_id',
    ];

//Json come with InvocieProduct add PurchasingOrder
protected $with = ['purchasing_order', 'product', 'customer_product', 'container'];


public function purchasing_order()
{
    return $this->belongsTo('App\PurchasingOrder', 'purchasing_order_id');
}

public function container()
{
    return $this->belongsTo('App\Container');
}
public function product()
{
    return $this->belongsTo('App\Product', 'product_id');
}
public function customer_product()
{
    return $this->belongsTo('App\CustomerProduct', 'customer_product_id');
}

}