如何将搜索栏中的值与laravel中数据库中的值进行比较

Question

我正在尝试在我的 Laravel 项目中使用搜索框，但从早上开始我一直收到同样的错误

这是我的Search controller

    <?php

    namespace App\Http\Controllers;

    use Illuminate\Http\Request;

    class SearchController extends Controller
    {
        public function index()
        {

            return view('search.index');
        }
        public function Search(Request $request)
        {
            $serial_number= $request->input('search');
            $results =DB::table('animals')->where(function ($query) use ($serial_number) {
                $query->where('serial_number','LIKE',"%$serial_number%");
            })->latest()->get();
            return view('search',compact('results'));

        }
    }

My routes

Route::get('/search','SearchController@index')->name('search');
Route::post('/search','SearchController@search')->name('search');

最后是我的view

    @extends('layouts.app')

    @section('content')
        <form action="{{ route('search') }}" method="POST">

            <div class="p-1 bg-light rounded rounded-pill shadow-sm mb-4">
                <div class="input-group">
                    <input type="search" name="search" placeholder="Here the animal serial number..." aria-describedby="button-addon1" class="form-control border-0 bg-light">
                    <div class="input-group-append">
                        <button id="button-addon1" type="submit" class="btn btn-link text-primary"><i class="fa fa-search"></i></button>
                    </div>
                </div>
            </div>
        </form>
        @if($results)
            <div class="container">
                <div class="row justify-content-center">
                    <div class="col-md-8">
                        <div class="card">
                            <div class="card-header">
                                <h3>Details for the animal</h3>

                            </div>
                            <div class="card-body">
                                <div class="col-12">
                                    <p><strong>Id: </strong>{{ $results->id }}</p>
                                    <p><strong>Animal: </strong>{{ $results->type->category }}</p>
                                    <p><strong>Gender: </strong>{{ $results->gender }}</p>
                                    <p><strong>Place Of Birth: </strong>{{ $results->user->address->city }}</p>
                                    <p><strong>Farm: </strong>{{ $results->user->name }}</p>
                                    <p><strong>Date: </strong>{{ $results->created_at }}</p>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>

        @endif
    @endsection

对我来说，我认为问题出在 $result 行上的 controller 上，这使得视图出现错误

419|页面已过期或“Facade\Ignition\Exceptions\ViewException 未定义变量：结果（查看： /Users/macair13/MeatracProject/resources/views/search/index.blade.php)"

Answer 1

您需要包含 CSRF 令牌或从 CSRF 令牌检查中排除该 URL。

<form ...>
    @csrf
    ...
</form>

Laravel 6.x Docs - CSRF

此外，您没有将 results 变量从 Controller 的 index 方法传递给您的“搜索”视图。您需要检查 $results isset 是否在您的视图中或将其传递给您的视图。