Yii2使用dropdownlist实现地区三级联动功能的方法

<?phpuse yii/helpers/Url;use yii/widgets/ActiveForm;use yii/helpers/ArrayHelper;use yii/helpers/Html;/* @var $this yii/web/View *//* @var $model common/search/service/ItemSearch *//* @var $form yii/widgets/ActiveForm */?><div class="row">  <div class="item-search">    <?php $form = ActiveForm::begin([      'action' => ['index'],      'method' => 'get',      'options' => ['class' => 'form-inline']    ]); ?>    <?= $form->field($model, 'cityName', ['options' => ['class' => 'form-group col-lg-2']])->dropDownList(ArrayHelper::map($cities, 'id', 'name'), ['prompt' => '请选择城市'])->label('请选择城市', ['class' => 'sr-only']) ?>    <?= $form->field($model, 'areaName', ['options' => ['class' => 'form-group col-lg-2']])->dropDownList(ArrayHelper::map($areas, 'id', 'name'), ['prompt' => '请选择区县'])->label('请选择区县', ['class' => 'sr-only']) ?>    <?= $form->field($model, 'communityName', ['options' => ['class' => 'form-group col-lg-2']])->dropDownList(ArrayHelper::map($communities, 'id', 'name'), ['prompt' => '请选择小区'])->label('请选择小区', ['class' => 'sr-only']) ?>    <div class="col-lg-2 col-lg-offset-1">      <input class="form-control" id="keyword" placeholder="请输入小区名" value="" />    </div>    <div class="col-lg-1">      <button type="button" id="search-community" class="btn btn-info">搜索</button>    </div>    <p></p>    <div class="form-group col-lg-1 pull-right">      <?= Html::submitButton('搜索', ['class' => 'btn btn-primary']) ?>    </div>    <?php ActiveForm::end(); ?>  </div></div><p> </p><?php$this->registerJs('  //市地址改变  $("#itemsearch-cityname").change(function() {    //市id值    var cityid = $(this).val();    $("#itemsearch-areaname").html("<option value=/"0/">请选择区县</option>");    $("#itemsearch-communityname").html("<option value=/"0/">请选择小区</option>");    if (cityid > 0) {      getArea(cityid);    }  });  //区地址改变  $("#itemsearch-areaname").change(function() {    //区id值    var areaid = $(this).val();    $("#itemsearch-communityname").html("<option value=/"0/">请选择小区</option>");    if (areaid > 0) {      getCommunity(areaid);    }  });  //获取市下面的区列表  function getArea(id)  {    var href = "' . Url::to(['/service/base/get-area-list'], true). '";    $.ajax({      "type" : "GET",      "url"  : href,      "data" : {id : id},      success : function(d) {        $("#itemsearch-areaname").append(d);      }    });  }  //获取区下面的小区列表  function getCommunity(id)  {    var href = "' . Url::to(['/service/base/get-community-list'], true) . '";    $.ajax({      "type" : "GET",      "url"  : href,      "data" : {id : id},      success : function(d) {        $("#itemsearch-communityname").append(d);      }    });  }  //搜索小区  $("#search-community").click(function() {    var word  = $("#keyword").val();    var areaid = $("#itemsearch-areaname option:selected").val();    var href  = "' . Url::to(['/service/base/search-community'], true) . '";    if (areaid > 0) {      $.ajax({        "type" : "GET",        "url"  : href,        "data" : {id : areaid, word : word},        success : function(d) {          $("#itemsearch-communityname").html(d);        }      });    }  });');?>

class HuangYeError extends /yii/db/ActiveRecord{  public $cityName;  public $areaName;  public $communityName;  public $group;  public $cate;  /**   * @inheritdoc   */  public static function tableName()  {    return 'll_hy_huangye_error';  }  public static function getDb()  {    return Yii::$app->get('dbnhuangye');  }}

class HuangYeErrorSearch extends HuangYeError{  const PAGE_SIZE = 20;  public $communityName;  public $startTime;  public $endTime;  /**   * @inheritdoc   */  public function rules()  {    return [      [['id', 'serviceid', 'userid', 'categoryid', 'communityid', 'sortorder', 'ctime', 'utime', 'status'], 'integer'],      [['username', 'name', 'logo', 'phone', 'address', 'content', 'error', 'communityName', 'startTime', 'endTime'], 'safe'],    ];  }  /**   * @inheritdoc   */  public function scenarios()  {    // bypass scenarios() implementation in the parent class    return Model::scenarios();  }  /**   * Creates data provider instance with search query applied   *   * @param array $params   *   * @return ActiveDataProvider   */  public function search($params)  {    $query = HuangYeError::find();    //status == 9 删除状态    $condition = ' `status` != :status';    $p[':status'] = 9;    $query->where($condition, $p);    $dataProvider = new ActiveDataProvider([      'query' => $query,      'pagination' => [        'pageSize' => self::PAGE_SIZE,      ],    ]);    $this->load($params);    if (!$this->validate()) {      // uncomment the following line if you do not want to any records when validation fails      // $query->where('0=1');      return $dataProvider;    }    $query->andFilterWhere([      'userid' => $this->userid    ]);    $query->andFilterWhere(['like', 'username', $this->username])      ->andFilterWhere(['like', 'name', $this->name])      ->andFilterWhere(['like', 'phone', $this->phone])      ->andFilterWhere(['like', 'address', $this->address])      ->andFilterWhere(['like', 'content', $this->content])      ->andFilterWhere(['ll_hy_huangye_error.status' => $this->status])      ->andFilterWhere(['ll_hy_huangye_error.categoryid' => $this->categoryid])      ->andFilterWhere(['between', 'ctime', strtotime($this->startTime . '0:0:0'), strtotime($this->endTime . '23:59:59')])      ->andFilterWhere(['like', 'error', $this->error]);    if (intval($this->communityName)) {      $query->andFilterWhere(['ll_hy_huangye_error.communityid' => intval($this->communityName)]);    }    $order = ' `ctime` DESC';    $query->orderBy($order);    return $dataProvider;  }}

/*** ajax请求小区** @param $id* @return string*/public function actionGetCommunityList($id){    $option = '';    $result = self::getCommunity($id);    if ($result) {      foreach ($result as $value) {        $option .= '<option value="' . $value['id'] . '">' . $value['name'] . '</option>';      }    } else {      $option .= '<option value="0">暂未开通可选择的小区</option>';    }    echo $option;}