用帖子搜索模型查询

Question

我目前在使用POST将数据从搜索表单发布到另一页时遇到问题。我在名为index的页面中有一个搜索表单。

在此索引页面上，我正在张贴另一种形式的表格，称为动物搜索。当我尝试使用_post数据进行搜索并且一个字段为空时，会引发错误。

索引

<div class="modal-dialog" role="document">
  <div class="modal-content">
  <form class="form-horizontal"  method="POST" action="/import-conditions/animal/animal-search">

    <div class="modal-header">

    <h4 align ="center"class="modal-title" >Animal and Animal Products Criteria Search</h4>
    </div>
    <div class="modal-body">


      <div class="form-group">
      <label for="common" class="col-sm-2 control-label">Common Name</label>
      <div class="col-sm-10">
        <input type="text" name="common" class="form-control" id="common" placeholder="Common Name" >
      </div>
      </div>


      <div class="form-group">
      <label for="scientifc" class="col-sm-2 control-label">Scientifc Name</label>
      <div class="col-sm-10">
         <select name="lp" class="form-control" id="lp">
          <option value="">Choose</option>
         <!--  -->
          </select>
      </div>
      </div>

       <div class="form-group">
      <label for="category" class="col-sm-2 control-label">Category</label>
      <div class="col-sm-10">
         <select name="category" class="form-control" id="category">
          <option value="">Choose</option>

          </select>
      </div>
      </div>


      <div class="form-group">
      <label for="variety" class="col-sm-2 control-label">Variety</label>
      <div class="col-sm-10">
        <input type="text" name="variety" class="form-control" id="variety" placeholder="Variety" >
      </div>
      </div>
    </div>
    <div class="modal-footer">

    <button type="submit" class="btn btn-primary">Search</button>
    </div>
  </form>
  </div>
  </div>

动物搜索

try
{
    $searchModel = new AnimalSearch();
    $searchModel->common = $_POST['common'];
    $searchModel->scientific = $_POST['scientific'];
    $searchModel->origin = $_POST['origin'];
    $searchModel->variety = $_POST['variety'];

    $dataProvider = $searchModel->search(Yii::$app->request->queryParams);

    return $this->render('animalsearch', [
        'searchModel' => $searchModel,
        'dataProvider' => $dataProvider,
    ]);
}
catch(\Exception $ex )
{
    var_dump($ex->getMessage()); die();
}