Php 在laravel的搜索表单中从数据库获取结果时出现问题

我有一个搜索表单，通过特定的标准城市、价格、正交、属性类型等列出属性/广告。当我试图在表单中输入一些值以获取数据库中对应的项目时，我遇到了问题，我得到的是空表，没有结果。我有三张桌子

properties (id, city, price, quadrature, property_type)

categories (id, category, priority)

category_property (id, property_id, category_id)

这种关系是多对多的，而且有效，我检查过了。这个类别表有默认值。在类别行中，它有报价、需求、购买、租赁、房屋、公寓，其中报价和需求优先于0，购买和租赁优先于1，房屋和公寓优先于2。在我的url中，当我点击submit按钮时，应该会得到如下内容

project/search/offer/buy/house/Madrid/min_price=10000-max_price=15000/min_quadrature=20-max_quadrature=30

其中，offer、buy、house是类别行中的值。我被困在那里如何解决这个问题，所以我可以显示适当的结果。非常感谢您的帮助。这是我的密码：

search.blade.php

<div class="row justify-content-md-center">

  <div class="col-md-8 order-md-1">
    <div>

      @if(isset($results))
        <table class="table">
          <thead>
            <th>City</th>
            <th>Price</th>
            <th>Quadrature</th>
          </thead>
          <tbody>
            @foreach ($results as $result)
              <tr>
                <th>{{ $result->city }}</th>
                <td>{{ $result->price }}</td>
                <td>{{ $result->quadrature }}</td>
              </tr>
            @endforeach
            @else
              @php
                {{echo "not set";}}
              @endphp
          </tbody>
        </table>
      @endif

    </div>
    <form id="searchForm" method="GET" action="/search">

      <div class="row">
        <div class="col-md-5 mb-3">
          <label>City</label>
          <input name="city" list="result" id="input" class="form-control">
          <datalist id="result"></datalist>
        </div>
      </div>

      <div class="row">
        <div class="col-md-6 mb-6">
          <label>Price</label>
          <input type="number" name="min_price" class="form-control" placeholder="Min Price">
          <input type="number" name="max_price" class="form-control" placeholder="Max Price">
        </div>
        <div class="col-md-6 mb-6">
          <label>Quadrature</label>
          <input type="number" name="min_quadrature" class="form-control" placeholder="Min quadrature">
          <input type="number" name="max_quadrature" class="form-control" placeholder="Max quadrature">
        </div>
      </div>

      <hr class="mb-4">

      <div class="row">

        <div class="col-md-4 mb-6">
          <h5>Payment</h4>
          <div class="d-block my-3">
            <div class="custom-control custom-radio">
              <input id="offer" name="propertyBidAsk" value="offer" type="radio" class="custom-control-input">
              <label class="custom-control-label" for="offer">Offer</label>
            </div>
            <div class="custom-control custom-radio">
              <input id="demand" name="propertyBidAsk" value="demand" type="radio" class="custom-control-input">
              <label class="custom-control-label" for="demand">Demand</label>
            </div>
          </div>
        </div>

        <div class="col-md-3 mb-6">
        <h5>Property payment</h4>
          <div class="d-block my-3">
            <div class="custom-control custom-radio">
               <input id="buy" name="propertyPayment" value="buy" type="radio" class="custom-control-input">
              <label class="custom-control-label" for="buy">Buy</label>
            </div>
            <div class="custom-control custom-radio">
              <input id="rent" name="propertyPayment" value="rent" type="radio" class="custom-control-input">
              <label class="custom-control-label" for="rent">rent</label>
            </div>
          </div>
        </div>

        <div class="col-md-5 mb-6">
          <h5>Property type</h4>
            <div class="d-block my-3 ">
              <div class="custom-control custom-radio">
                <input id="house" name="propertyType" value="house" type="radio" class="custom-control-input">
                <label class="custom-control-label" for="house">House</label>
              </div>
              <div class="custom-control custom-radio">
                <input id="flat" name="propertyType" value="flat" type="radio" class="custom-control-input">
                <label class="custom-control-label" for="flat">Flat</label>
              </div>

    <hr class="mb-4">

    <button class="btn btn-primary btn-lg btn-block">Search</button>

  </form>

  <script>
    var onSubmitFunc = function(e){
      e.preventDefault();
      e.stopPropagation();
      if( e.stopImmediatePropagation ){
        e.stopImmediatePropagation();
      }

      var propertyBidAsk = this["propertyBidAsk"].value.trim();
      var propertyPayment = this["propertyPayment"].value.trim();
      var propertyType = this["propertyType"].value.trim();
      var city = this['city'].value.trim();
      var min_price = this["min_price"].value.trim();
      var max_price = this["max_price"].value.trim();
      var price = min_price + "_" + max_price;
      var min_quadrature = this["min_quadrature"].value.trim();
      var max_quadrature = this["max_quadrature"].value.trim();
      var quadrature = min_quadrature + "_" + max_quadrature;

      url = propertyBidAsk.length === 0 ? '' : ( '/' + encodeURIComponent(propertyBidAsk) );
      url += propertyPayment.length === 0 ? '' : ( '/' +  encodeURIComponent(propertyPayment) );
      url += propertyType.length === 0 ? '' : ( '/' + encodeURIComponent(propertyType) );
      url += city.length === 0 ? '' : ( '/' + encodeURIComponent(city) );
      url += min_price.length === 0 ? '' : ( '/min_price' + "=" + encodeURIComponent(min_price) );
      url += max_price.length === 0 ? '' : ( '-max_price' + "=" + encodeURIComponent(max_price) );
      url += min_quadrature.length === 0 ? '' : ( '/min_quadrature' + "=" + encodeURIComponent(min_quadrature) );
      url += max_quadrature.length === 0 ? '' : ( '-max_quadrature' + "=" + encodeURIComponent(max_quadrature) );

      window.location.href = this.action + url;

    }

    document.addEventListener( 'DOMContentLoaded', function(){
    var srch = document.getElementById("searchForm");
    srch.addEventListener('submit', onSubmitFunc, false);
    }, false );

  </script>

</div>

</div>

CategoryController.php

<?php
namespace App\Http\Controllers;

use App\Http\Controllers\Controller;
use App\Property;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Redirect;

class CategoryController extends Controller
{
    public function index()
    {
        $data = \DB::table('properties');
        return view('categories.search', compact('data'));
    }

    public function search($propertyBidAsk, $propertyType, $propertyPayment, $city, $price, $quadrature, Request $request, Property $property)
    {
        $category = $property->category;

        $results = null;

        if (!empty($request->city)) {
        $results = Property::all()->where('city', 'LIKE', "%" . $request->city . "%");
        }

        if (!empty($request->min_price) && !empty($request->max_price )) {
        $results = Property::all()->where('price', '>=', $request->min_price)->where('price', '<=', $request->max_price);
        }

        if (!empty($request->min_quadrature) && !empty($request->max_quadrature )) {
        $results = Property::all()->where('quadrature', '>=', $request->min_quadrature)->where('price', '<=', $request->max_quadrature);
        }

        return view('categories.search', compact('category', 'results'));
    }

}

web.php

<?php

//search

Route::get('/search', 'CategoryController@index');

Route::get('/search/{propertyBidAsk}/{propertyPayment}/{propertyType}/
{city}/{price}/{quadrature}', 'CategoryController@search');

请将CategoryController中的搜索操作替换为以下代码：

public function search($propertyBidAsk, $propertyType, $propertyPayment, $city, $price, $quadrature, Request $request, Property $property)
{
    $category = $property->category;

    $property_obj = Property::query();
    if (!empty($request->city)) {
        $property_obj->where('city', 'LIKE', "%" . $request->city . "%");
    }

    if (!empty($request->min_price) && !empty($request->max_price)) {
        $property_obj->where('price', '>=', $request->min_price)->where('price', '<=', $request->max_price);
    }

    if (!empty($request->min_quadrature) && !empty($request->max_quadrature)) {
        $property_obj->where('quadrature', '>=', $request->min_quadrature)->where('price', '<=', $request->max_quadrature);
    }

    $results =  $property_obj->get();

    return view('categories.search', compact('category', 'results'));
}

---

您正在向/搜索发出GET请求。你能展示你的web.php吗？@SujeetAgrahari我编辑了这篇文章。顺便说一句，我的url工作正常。我想我需要GET请求。你得到了什么错误？@SujeetAgrahari当我提交时没有错误。我的url发生更改，显示空表。请尝试以下代码$propery=Property:：query；如果空$request->city{$propery->where'city'，LIKE'，%。$request->city.%；}如果！空$request->minu price&&！空$request->max_price{$property->where'price'，'>='，$request->min_price->where'price'，'='，$request->min_quarture->where'price'，Just where$results=$property\u obj->all，而不是它应该得到的所有，并且它可以工作。您能帮助其他的工作吗？从categories表中获取数据吗？