/**
     * 添加标签方法
     * param:$event为存储传入的tag数组值
     */
    public function _eventAddTag($event)
    {
        //实例化表单模型
        $tag = new TagForm();
        //传值
        $tag->tags = $event->data['tags'];
        //实现保存方法
        $tagids = $tag->saveTags();
        //删除原先的关联关系，与文章多对多的关系,利用数据库表中的relation_post_tags的对应关系
        RelationPostTags::deleteAll(['post_id' => $event->data['id']]);
        //遍历多维数据
        if (!empty($tagids)) {
            foreach ($tagids as $k=>$id){
                $row[$k]['post_id'] = $this->id;
                $row[$k]['tag_id'] = $id;
            }
            //实现批量插入保存
            $res = (new Query())->createCommand()
            ->batchInsert(RelationPostTags::tableName(),['post_id','tag_id'],$row)
            ->execute();
            //保存失败
            if ($res)
                throw new \Exception("关联保存失败");
        }

    }

<?php
namespace frontend\models;
use Yii;
use common\models\Tags;
use yii\base\Model;

/**
 * 标签表单模型
 * @author ZJJ
 *
 */
class TagForm extends Model
{
    //定义参数属性
    public $id;
    public $tags;
    /**
     * 加入规则
     */
    public function rules()
    {
        return [
            ['tags','required'],
            ['tags','each','rule'=>['string']],
        ];
    }
    /**
     * 保存标签集合
     * 返回所有的id
     */
    public function saveTags()
    {
        //定义常量ids
        $ids = [];
        if (!empty($this->tags)) {
            foreach ($this->tags as $tag){
                $ids[] = $this->_saveTag($tag);
            }
        }
        return $ids;
    }
    /**
     * 保存单个标签的方法
     */
    private function _saveTag($tag)
    {
        //利用业务逻辑
        $model = new Tags();
        //查询标签是否存在
        $res = $model->find()->where(['tag_name'=>$tag])->one();
        //新建标签
        if (!$res) {
            //数据保存，与数据表中tags字段保持一致
            $model->tag_name = $tag;
            $model->post_num = 1;
            if (!$model->save()){
                throw new \Exception("保存标签失败");
            }
            return $model->id;
        }else {
            //post_num字段的值基础上+1
            $res->updateCounters(['post_num' => 1]);
        }
        return $res->id;
    }
}

 public function behaviors()
    {
        return [
            'access' => [
                'class' => AccessControl::className(),
                'only' => ['index', 'create', 'upload', 'ueditor'],
                'rules' => [
                    [
                        'actions' => ['index'],
                        'allow' => true,
                    ],
                    [
                        'actions' => ['create', 'upload', 'ueditor'],
                        'allow' => true,
                        'roles' => ['@'],
                    ],
                ],
            ],
            'verbs' => [
                'class' => VerbFilter::className(),
                'actions' => [
                    '*' => ['get', 'post'],
                    'create' => ['get','post'],
                ],
            ],
        ];
    }