php artisan make:request ProjectValidate

namespace App\Http\Requests;
use Illuminate\Foundation\Http\FormRequest;
class ProjectValidate 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()
  {
    return [
      'title' => 'bail|required',
      'body' => 'required',
    ];
  }
  /**
   * define the validation message
   *
   * @return array
   */
  public function messages()
  {
    return [
      'title.required' => '文章标题必填',
      'body.required' => '文章内容必填',
    ];
  }
}

namespace App\Http\Controllers\Backend\Project;

use App\Http\Requests\ProjectValidate;
use App\Http\Controllers\Backend\UCenter;

class Index extends UCenter
{
  public function index()
  {
    return success();
  }
  public function addData(ProjectValidate $request)
  {
    $validated = $request->validated();
    return success($validated);
  }
}

public function render($request, Exception $exception)
  {
    if ($exception instanceof ValidationException) {
      // 只读取错误中的第一个错误信息
      $errors = $exception->errors();
      $message = '';
      // 框架返回的是二维数组，因此需要去循环读取第一个数据
      foreach ($errors as $key => $val) {
        $keys  = array_key_first($val);
        $message = $val[$keys];
        break;
      }
      return response()->json(['code' => 1001, 'message' => $message, 'data' => []], 422);
    }
    return parent::render($request, $exception);
  }