laravel框架关于搜索功能的实现


            这里的搜索功能主要基于表单get提交实现的





<form action="/backend/auditList" method="get">

  <table class="search_tab">

    <tr>

      <th width="120">选择分类:</th>

      <td>

        <select name="class" >

          <option value="">全部</option>

          @foreach($category as $c)

            <option value="{{$c->id}}">{{$c->class_name}}</option>

          @endforeach

        </select>

      </td>

      <th width="70">文章标题:</th>

      <!--查询关键词-->

      <td><input type="text" name="keywords" placeholder="文章标题"></td>

      <td><input type="submit" name="sub" value="查询"></td>

    </tr>

  </table>

</form>





php部分逻辑





public function article_list(){

  //echo 'zoule';exit; 测试表单是否走进方法中 大家随意写

  $shownum = 1;

  if(array_key_exists('class',$_GET)||array_key_exists('keywords',$_GET)){

   //echo '111'; 

   if($_GET['class']){

   //Article模型 leftJoin表连接 查询根据俩个表里的这些字段来执行

     $postdata = Article::leftJoin('category', function($join) {

      $join->on('article.class_id', '=', 'category.id');

     })->select(['article.id','category.class_name','article.status','article.title_editing','article.update_time'])->where('article.class_id','=',$_GET['class'])->orderBy('release_time','desc')->paginate($shownum);

   }elseif($_GET['keywords']){

     $postdata = Article::leftJoin('category', function($join) {

      $join->on('article.class_id', '=', 'category.id');

     })->select(['article.id','category.class_name','article.status','article.title_editing','article.update_time'])->where('article.title_editing','=',$_GET['keywords'])->orderBy('release_time','desc')->paginate($shownum);

    

   }else{

     $postdata = Article::leftJoin('category', function($join) {

      $join->on('article.class_id', '=', 'category.id');

     })->select(['article.id','category.class_name','article.status','article.title_editing','article.update_time'])->orderBy('release_time','desc')->paginate($shownum);

   }

  }else{

   //echo '2222';

   $postdata = Article::leftJoin('category', function($join) {

     $join->on('article.class_id', '=', 'category.id');

   })->select(['article.id','category.class_name','article.status','article.title_editing','article.update_time'])->orderBy('release_time','desc')->paginate($shownum);

  }

  //分类id不是父id

  $category = DB::table('category')->where('parent_id','!=','0')->get();

  //渲染页面 传递 参数

  return view('backend.article_list',['postdata'=>$postdata,'shownum'=>$shownum,'category'=>$category]);

}