如何通過在laravel中加入四個表來更新列

Question

我有四張桌子

• default_products_product_mileage_gap
• default_products_mileage_gap
• default_products_products
• default_products_products_mileage_gaps

我正在嘗試使用 laravel 將number_of_products_sold列更新為某個值

我嘗試過的是：

$qty = 1;

$m = DB::table('products_products')
    ->join(
        'products_products_mileage_gaps',
        'products_products.id',
        '=',
        'products_products_mileage_gaps.entry_id'
    )
    ->join(
        'products_product_mileage_gap',
        'products_products_mileage_gaps.related_id',
        '=',
        'products_product_mileage_gap.id'
    )
    ->join(
        'products_mileage_gap',
        'products_mileage_gap.id',
        '=',
        'products_product_mileage_gap.mileage_gap_id'
    )
    ->where('products_product_mileage_gap.number_of_products', '>', 0)
    ->where('products_mileage_gap.name', '=', $mileage_name)
    ->where('products_products.id', '=', $id)
    ->update(
        array(
            'products_product_mileage_gap.number_of_products_sold' => $qty
        )
    );

這里number_of_products_sold沒有更新。

如何更新列

Answer 1

為什么要將四個表加在一起。 這是一個通過控制器添加或更新多個表的示例。

 public function processEmployee(Request $request) { $data = $request->all(); $user = User::create([ 'name' =>$data['emp_name'], 'email' =>$data['email'], ]); $emp = Employee::create([ 'photo' => $emp_image, 'name' => $data['emp_name'], 'code' => $data['emp_code'], 'status' => $data['emp_status'], 'email' => $data['email'], 'gender' => $data['gender'], 'qualification' => $data['qualification'], 'emergency_number' => $data['emer_number'], 'pan_number' => $data['pan_number'], 'father_name' => $data['father_name'], 'current_address ' => $data['current_address'], 'permanent_address' => $data['permanent_address'], 'formalities' => $data['formalities'], 'offer_acceptance' => $data['offer_acceptance'], 'probation_period' => $data['prob_period'], 'department' => $data['department'], 'salary' => $data['salary'], 'account_number' => $data['account_number'], 'bank_name' => $data['bank_name'], 'ifsc_code' => $data['ifsc_code'], 'pf_account_number' => $data['pf_account_number'], 'un_number' => $data['un_number'], 'pf_status' => $data['pf_status'], 'user_id' => $user->id, ]); $userRole = UserRole::create([ 'role_id' => $data['role'], 'user_id' => $user->id, ]), ]); if(isset($emp, $user, $userRole)) { return redirect()->route('employee-manager') ->with('message', 'Employee Successfully Registered.'); }else{ return redirect()->to($this->getRedirectUrl()) ->withInput($request->input())->with('error', 'Action Failed Please try again.'); } }