我如何在 Laravel 5.5 的 FormRequest 类中返回自定义响应？

我正在制作一个 API，我想返回错误数组，其格式如下$validator->errors();当我通过手动方式验证请求时生成。但我无法操纵响应。我想找到正确的制作方法。

这可以在 Laravel 5.4 中通过formatErrors方法并包括Illuminate\Contracts\Validation\ValidatorFormRequest 类中的类，但对于 5.5 版本它不起作用。我不知道怎么做。

这是我的控制器：

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Http\Requests\ProductRequest;
use Illuminate\Validation\Rule;
use App\Product;

class ProductController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index(ProductRequest $request)
    {
        $products = Product::where('code', 'LIKE', '%'.$request->input('search').'%')
        ->where('name', 'LIKE', '%'.$request->input('search').'%')
        ->paginate(10);
        $products->withPath($request->fullUrl());
        return $products;
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function create()
    {

    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(ProductRequest $request)
    {
        $product = new Product($request->validated());
        $product->save();
        return response('', 201);
    }

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function show($id)
    {
        $product = Product::find($id);
        return response($product, 200);
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function edit($id)
    {
        //
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function update(ProductRequest $request, $id)
    {
        $product = Product::find($id);
        $product->fill($request->validated());
        $product->save();
        return response('', 200);
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function destroy($id)
    {
        $product = Product::find($id);
        $product->delete();
        return response('', 204);
    }
}

这是我的 FormRequest 类

<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\Rule;

class ProductRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        switch($this->method())
        {
            case 'GET':
            {
                return [
                    'code' => 'string',
                    'name' => 'string',
                ];
            } break;
            case 'POST':
            {
                return [
                    'code' => 'required|unique:Products,code',
                    'name' => 'required',
                    'description' => 'required',
                    'quantity' => 'required|min:0',
                    'price' => 'required|numeric',
                    'extemp' => [
                        Rule::in(['tax', 'free']),
                    ]
                ];
            } break;
            case 'PUT':
            {
                return [
                    'code' => 'unique:products,code,'.$this->route('product'),
                    'name' => 'string:min:1',
                    'description' => 'string|min:1',
                    'quantity' => 'integer|min:0',
                    'price' => 'numeric',
                    'extemp' => [
                        Rule::in(['tax', 'free']),
                    ],
                ];
            } break;
            case 'PATCH': break;
            case 'DELETE': break;
            default:
            {
                return [];
            } break;
        }
    }

    /**
     * Get the error messages for the defined validation rules.
     *
     * @return array
     */
    public function messages()
    {
        return [
            //Product
            'code.required' => 'El :attribute es obligatorio.',
            'code.unique' => 'El :attribute ya se encuentra registrado.',
            'name.required' => 'El :attribute es obligatorio.',
            'name.min' => 'El :attribute es obligatorio.',
            'description.required' => 'El :attribute es obligatorio.',
            'description.min' => 'El :attribute es obligatorio.',
            'quantity.required' => 'La :attribute es obligatoria.',
            'quantity.integer' => 'La :attribute debe ser un número entero.',
            'quantity.min' => 'La :attribute debe ser al menos :min.',
            'price.required' => 'El :attribute es obligatorio.',
            'price.numeric' => 'El :attribute debe ser un valor numérico.',
            'extemp.in' => 'El :attribute seleccionado es inválido.',
        ];
    }
    public function attributes(){
        return [
            'code' => 'código',
            'name' => 'nombre',
            'description' => 'descripción',
            'quantity' => 'cantidad',
            'price' => 'precio',
            'extemp' => 'exento',
        ];
    }
}

我的回应：

{
    "message": "The given data was invalid.",
    "errors": {
        "code": [
            "El código es obligatorio."
        ],
        "name": [
            "El nombre es obligatorio."
        ],
        "description": [
            "El descripción es obligatorio."
        ],
        "quantity": [
            "La cantidad es obligatoria."
        ],
        "price": [
            "El precio es obligatorio."
        ]
    }
}

我想要的回应 (with $validator->errors();)

[
    "El código es obligatorio.",
    "El nombre es obligatorio.",
    "El descripción es obligatorio.",
    "La cantidad es obligatoria.",
    "El precio es obligatorio."
]

你必须override the failedValidation()方法并发出异常并给出您想要的响应。 所以，你需要使用Illuminate\Contracts\Validation\Validator and Illuminate\Http\Exceptions\HttpResponseException在里面申请表类，并覆盖failedValidation() method:

protected function failedValidation(Validator $validator) { 
        throw new HttpResponseException(response()->json($validator->errors()->all(), 422)); 
}