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添加Traits/Think/Model traits 用于Model组装(此为测试）

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ThinkPHP
2013-04-17 21:46:31 +08:00
parent 1386280ffd
commit 49ee891da1
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169
Traits/Think/Model/Extend.php Normal file
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<?php
// +----------------------------------------------------------------------
// | TOPThink [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2011 http://topthink.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace Traits\Think;
trait Extend {
protected $partition = [];
/**
* 字段值延迟增长
* @access public
* @param string $field 字段名
* @param integer $step 增长值
* @param integer $lazyTime 延时时间(s)
* @return boolean
*/
public function setLazyInc($field,$step=1,$lazyTime=0) {
$condition = $this->options['where'];
if(empty($condition)) { // 没有条件不做任何更新
return false;
}
if($lazyTime>0) {// 延迟写入
$guid = md5($this->name.'_'.$field.'_'.serialize($condition));
$step = $this->lazyWrite($guid,$step,$lazyTime);
if(false === $step ) return true; // 等待下次写入
}
return $this->setField($field,array('exp',$field.'+'.$step));
}
/**
* 字段值延迟减少
* @access public
* @param string $field 字段名
* @param integer $step 减少值
* @param integer $lazyTime 延时时间(s)
* @return boolean
*/
public function setLazyDec($field,$step=1,$lazyTime=0) {
$condition = $this->options['where'];
if(empty($condition)) { // 没有条件不做任何更新
return false;
}
if($lazyTime>0) {// 延迟写入
$guid = md5($this->name.'_'.$field.'_'.serialize($condition));
$step = $this->lazyWrite($guid,$step,$lazyTime);
if(false === $step ) return true; // 等待下次写入
}
return $this->setField($field,array('exp',$field.'-'.$step));
}
/**
* 延时更新检查 返回false表示需要延时
* 否则返回实际写入的数值
* @access public
* @param string $guid 写入标识
* @param integer $step 写入步进值
* @param integer $lazyTime 延时时间(s)
* @return false|integer
*/
protected function lazyWrite($guid,$step,$lazyTime) {
if(false !== ($value = F($guid))) { // 存在缓存写入数据
if(time()>S($guid.'_time')+$lazyTime) {
// 延时更新时间到了，删除缓存数据 并实际写入数据库
S($guid,NULL);
S($guid.'_time',NULL);
return $value+$step;
}else{
// 追加数据到缓存
S($guid,$value+$step);
return false;
}
}else{ // 没有缓存数据
S($guid,$step);
// 计时开始
S($guid.'_time',time());
return false;
}
}
/**
* 批处理执行SQL语句
* 批处理的指令都认为是execute操作
* @access public
* @param array $sql SQL批处理指令
* @return boolean
*/
public function patchQuery($sql=[]) {
if(!is_array($sql)) return false;
// 自动启动事务支持
$this->startTrans();
try{
foreach ($sql as $_sql){
$result = $this->execute($_sql);
if(false === $result) {
// 发生错误自动回滚事务
$this->rollback();
return false;
}
}
// 提交事务
$this->commit();
} catch (\Think\Exception $e) {
$this->rollback();
}
return true;
}
/**
* 得到分表的的数据表名
* @access public
* @param array $data 操作的数据
* @return string
*/
public function getPartitionTableName($data=[]) {
// 对数据表进行分区
if(isset($data[$this->partition['field']])) {
$field = $data[$this->partition['field']];
switch($this->partition['type']) {
case 'id':
// 按照id范围分表
$step = $this->partition['expr'];
$seq = floor($field / $step)+1;
break;
case 'year':
// 按照年份分表
if(!is_numeric($field)) {
$field = strtotime($field);
}
$seq = date('Y',$field)-$this->partition['expr']+1;
break;
case 'mod':
// 按照id的模数分表
$seq = ($field % $this->partition['num'])+1;
break;
case 'md5':
// 按照md5的序列分表
$seq = (ord(substr(md5($field),0,1)) % $this->partition['num'])+1;
break;
default :
if(function_exists($this->partition['type'])) {
// 支持指定函数哈希
$fun = $this->partition['type'];
$seq = (ord(substr($fun($field),0,1)) % $this->partition['num'])+1;
}else{
// 按照字段的首字母的值分表
$seq = (ord($field{0}) % $this->partition['num'])+1;
}
}
return $this->getTableName().'_'.$seq;
}else{
// 当设置的分表字段不在查询条件或者数据中
// 进行联合查询，必须设定 partition['num']
$tableName = [];
for($i=0;$i<$this->partition['num'];$i++)
$tableName[] = 'SELECT * FROM '.$this->getTableName().'_'.($i+1);
$tableName = '( '.implode(" UNION ",$tableName).') AS '.$this->name;
return $tableName;
}
}
}