<?php
class TagModel extends AdvModel {
	// 将关键字处理为数组格式并去重(用于关联操作的添加方法)	
	public function tag_array($keywords,$sid=1){
		$tag_arr = explode(',',$keywords);
		$tag_arr = array_unique($tag_arr);
		foreach($tag_arr as $key=>$value){
			$data[$key] = array('tag_id','tag_sid'=>$sid,'tag_name'=>$value);
		}
		return $data;
	}
	// 更新Tag 不采用关联模式(用于手动更新关联,删除之前的数据后重新写入)
	public function tag_update($id,$tag,$sid){
		$rs = M("Tag");
		$data['tag_id'] = $id;
		$data['tag_sid'] = $sid;
		$rs->where($data)->delete();
		$tags = explode(',',trim($tag));
		$tags = array_unique($tags);
		foreach($tags as $key=>$val){
			$data['tag_name'] = $val;
			$rs->data($data)->add();
		}
	}
}
?>