<?php
// +----------------------------------------------------------------------
// | OneThink [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2013 http://www.onethink.cn All rights reserved.
// +----------------------------------------------------------------------
// | Author: huajie <banhuajie@163.com>
// +----------------------------------------------------------------------
namespace Admin\Model;
use Think\Model;
/**
* 属性模型
* @author huajie <banhuajie@163.com>
*/
class AttributeModel extends Model {
/* 自动验证规则 */
protected $_validate = array(
array('name', 'require', '字段名必须', self::MUST_VALIDATE, 'regex', self::MODEL_BOTH),
array('name', '/^[a-zA-Z][\w_]{1,29}$/', '字段名不合法', self::MUST_VALIDATE, 'regex', self::MODEL_BOTH),
array('name', 'checkName', '字段名已存在', self::MUST_VALIDATE, 'callback', self::MODEL_BOTH),
array('field', 'require', '字段定义必须', self::MUST_VALIDATE, 'regex', self::MODEL_BOTH),
array('field', '1,100', '注释长度不能超过100个字符', self::VALUE_VALIDATE, 'length', self::MODEL_BOTH),
array('title', '1,100', '注释长度不能超过100个字符', self::VALUE_VALIDATE, 'length', self::MODEL_BOTH),
array('remark', '1,100', '备注不能超过100个字符', self::VALUE_VALIDATE, 'length', self::MODEL_BOTH),
array('model_id', 'require', '未选择操作的模型', self::MUST_VALIDATE, 'regex', self::MODEL_BOTH),
);
/* 自动完成规则 */
protected $_auto = array(
array('status', 1, self::MODEL_INSERT, 'string'),
array('create_time', 'time', self::MODEL_INSERT, 'function'),
array('update_time', 'time', self::MODEL_BOTH, 'function'),
);
/* 操作的表名 */
protected $table_name = null;
/**
* 新增或更新一个属性
* @return boolean fasle 失败 ， int 成功 返回完整的数据
* @author huajie <banhuajie@163.com>
*/
public function update($data = null, $create = true){
/* 获取数据对象 */
$data = empty($data) ? $_POST : $data;
$data = $this->create($data);
if(empty($data)){
return false;
}
/* 添加或新增属性 */
if(empty($data['id'])){ //新增属性
$id = $this->add();
if(!$id){
$this->error = '新增属性出错！';
return false;
}
if($create){
//新增表字段
$res = $this->addField($data);
if(!$res){
$this->error = '新建字段出错！';
//删除新增数据
$this->delete($id);
return false;
}
}
} else { //更新数据
if($create){
//更新表字段
$res = $this->updateField($data);
if(!$res){
$this->error = '更新字段出错！';
return false;
}
}
$status = $this->save();
if(false === $status){
$this->error = '更新属性出错！';
return false;
}
}
//删除字段缓存文件
$model_name = M('Model')->field('name')->find($data['model_id']);
$cache_name = C('DB_NAME').'.'.preg_replace('/\W+|\_+/','',$model_name['name']);
F($cache_name, null, DATA_PATH.'_fields/');
//记录行为
action_log('update_attribute', 'attribute', $data['id'] ? $data['id'] : $id, UID);
//内容添加或更新完成
return $data;
}
/**
* 检查同一张表是否有相同的字段
* @author huajie <banhuajie@163.com>
*/
protected function checkName(){
$name = I('post.name');
$model_id = I('post.model_id');
$id = I('post.id');
$map = array('name'=>$name, 'model_id'=>$model_id);
if(!empty($id)){
$map['id'] = array('neq', $id);
}
$res = $this->where($map)->find();
return empty($res);
}
/**
* 检查当前表是否存在
* @param intger $model_id 模型id
* @return intger 是否存在
* @author huajie <banhuajie@163.com>
*/
protected function checkTableExist($model_id){
$Model = M('Model');
//当前操作的表
$model = $Model->where(array('id'=>$model_id))->field('name,extend')->find();
if($model['extend'] == 0){ //独立模型表名
$table_name = $this->table_name = C('DB_PREFIX').strtolower($model['name']);
}else{ //继承模型表名
$extend_model = $Model->where(array('id'=>$model['extend']))->field('name,extend')->find();
$table_name = $this->table_name = C('DB_PREFIX').strtolower($extend_model['name']).'_'.strtolower($model['name']);
}
$sql = <<<sql
SHOW TABLES LIKE '{$table_name}';
sql;
$res = M()->query($sql);
return count($res);
}
/**
* 新建表字段
* @param array $field 需要新建的字段属性
* @return boolean true 成功 ， false 失败
* @author huajie <banhuajie@163.com>
*/
protected function addField($field){
//检查表是否存在
$table_exist = $this->checkTableExist($field['model_id']);
//获取默认值
if($field['value'] === ''){
$default = '';
}elseif (is_numeric($field['value'])){
$default = ' DEFAULT '.$field['value'];
}elseif (is_string($field['value'])){
$default = ' DEFAULT \''.$field['value'].'\'';
}else {
$default = '';
}
if($table_exist){
$sql = <<<sql
ALTER TABLE `{$this->table_name}`
ADD COLUMN `{$field['name']}` {$field['field']} {$default} COMMENT '{$field['title']}';
sql;
}else{
//新建表时是否默认新增“id主键”字段
$model_info = M('Model')->field('engine_type,need_pk')->getById($field['model_id']);
if($model_info['need_pk']){
$sql = <<<sql
CREATE TABLE IF NOT EXISTS `{$this->table_name}` (
`id` int(10) UNSIGNED NOT NULL AUTO_INCREMENT COMMENT '主键' ,
`{$field['name']}` {$field['field']} {$default} COMMENT '{$field['title']}' ,
PRIMARY KEY (`id`)
)
ENGINE={$model_info['engine_type']}
DEFAULT CHARACTER SET=utf8 COLLATE=utf8_general_ci
CHECKSUM=0
ROW_FORMAT=DYNAMIC
DELAY_KEY_WRITE=0
;
sql;
}else{
$sql = <<<sql
CREATE TABLE IF NOT EXISTS `{$this->table_name}` (
`{$field['name']}` {$field['field']} {$default} COMMENT '{$field['title']}'
)
ENGINE={$model_info['engine_type']}
DEFAULT CHARACTER SET=utf8 COLLATE=utf8_general_ci
CHECKSUM=0
ROW_FORMAT=DYNAMIC
DELAY_KEY_WRITE=0
;
sql;
}
}
$res = M()->execute($sql);
return $res !== false;
}
/**
* 更新表字段
* @param array $field 需要更新的字段属性
* @return boolean true 成功 ， false 失败
* @author huajie <banhuajie@163.com>
*/
protected function updateField($field){
//检查表是否存在
$table_exist = $this->checkTableExist($field['model_id']);
if(empty($table_exist)){
$Model = M('Model');
//当前操作的表
$model = $Model->where(array('id'=>$field['model_id']))->field('name,extend')->find();
$this->table_name = 'tab_'.strtolower($model['name']);
}
//获取原字段名
$last_field = $this->getFieldById($field['id'], 'name');
//获取默认值
$default = $field['value']!='' ? ' DEFAULT '.$field['value'] : '';
$sql = <<<sql
ALTER TABLE `{$this->table_name}`
CHANGE COLUMN `{$last_field}` `{$field['name']}` {$field['field']} {$default} COMMENT '{$field['title']}' ;
sql;
$res = M()->execute($sql);
return $res !== false;
}
/**
* 删除一个字段
* @param array $field 需要删除的字段属性
* @return boolean true 成功 ， false 失败
* @author huajie <banhuajie@163.com>
*/
public function deleteField($field){
//检查表是否存在
$table_exist = $this->checkTableExist($field['model_id']);
$sql = <<<sql
ALTER TABLE `{$this->table_name}`
DROP COLUMN `{$field['name']}`;
sql;
$res = M()->execute($sql);
return $res !== false;
}
}