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