ViewModel.class.php
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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace Think\Model;
use Think\Model;
/**
* ThinkPHP视图模型扩展
*/
class ViewModel extends Model
{
protected $viewFields = array();
/**
* 自动检测数据表信息
*
* @access protected
* @return void
*/
protected function _checkTableInfo()
{}
/**
* 得到完整的数据表名
*
* @access public
* @return string
*/
public function getTableName()
{
if (empty($this->trueTableName)) {
$tableName = '';
foreach ($this->viewFields as $key => $view) {
// 获取数据表名称
if (isset($view['_table'])) { // 2011/10/17 添加实际表名定义支持 可以实现同一个表的视图
$tableName .= $view['_table'];
$prefix = $this->tablePrefix;
$tableName = preg_replace_callback("/__([A-Z_-]+)__/sU", function ($match) use($prefix)
{
return $prefix . strtolower($match[1]);
}, $tableName);
} else {
$class = $key . 'Model';
$Model = class_exists($class) ? new $class() : M($key);
$tableName .= $Model->getTableName();
}
// 表别名定义
$tableName .= ! empty($view['_as']) ? ' ' . $view['_as'] : ' ' . $key;
// 支持ON 条件定义
$tableName .= ! empty($view['_on']) ? ' ON ' . $view['_on'] : '';
// 指定JOIN类型 例如 RIGHT INNER LEFT 下一个表有效
$type = ! empty($view['_type']) ? $view['_type'] : '';
$tableName .= ' ' . strtoupper($type) . ' JOIN ';
$len = strlen($type . '_JOIN ');
}
$tableName = substr($tableName, 0, - $len);
$this->trueTableName = $tableName;
}
return $this->trueTableName;
}
/**
* 表达式过滤方法
*
* @access protected
* @param string $options
* 表达式
* @return void
*/
protected function _options_filter(&$options)
{
if (isset($options['field'])) {
$options['field'] = $this->checkFields($options['field']);
} else {
$options['field'] = $this->checkFields();
}
if (isset($options['group'])) {
$options['group'] = $this->checkGroup($options['group']);
}
if (isset($options['where'])) {
$options['where'] = $this->checkCondition($options['where']);
}
if (isset($options['order'])) {
$options['order'] = $this->checkOrder($options['order']);
}
}
/**
* 检查是否定义了所有字段
*
* @access protected
* @param string $name
* 模型名称
* @param array $fields
* 字段数组
* @return array
*/
private function _checkFields($name, $fields)
{
if (false !== $pos = array_search('*', $fields)) { // 定义所有字段
$fields = array_merge($fields, M($name)->getDbFields());
unset($fields[$pos]);
}
return $fields;
}
/**
* 检查条件中的视图字段
*
* @access protected
* @param mixed $data
* 条件表达式
* @return array
*/
protected function checkCondition($where)
{
if (is_array($where)) {
$view = array();
// 检查视图字段
foreach ($this->viewFields as $key => $val) {
$k = isset($val['_as']) ? $val['_as'] : $key;
$val = $this->_checkFields($key, $val);
foreach ($where as $name => $value) {
if (false !== $field = array_search($name, $val, true)) {
// 存在视图字段
$_key = is_numeric($field) ? $k . '.' . $name : $k . '.' . $field;
$view[$_key] = $value;
unset($where[$name]);
}
}
}
$where = array_merge($where, $view);
}
return $where;
}
/**
* 检查Order表达式中的视图字段
*
* @access protected
* @param string $order
* 字段
* @return string
*/
protected function checkOrder($order = '')
{
if (is_string($order) && ! empty($order)) {
$orders = explode(',', $order);
$_order = array();
foreach ($orders as $order) {
$array = explode(' ', trim($order));
$field = $array[0];
$sort = isset($array[1]) ? $array[1] : 'ASC';
// 解析成视图字段
foreach ($this->viewFields as $name => $val) {
$k = isset($val['_as']) ? $val['_as'] : $name;
$val = $this->_checkFields($name, $val);
if (false !== $_field = array_search($field, $val, true)) {
// 存在视图字段
$field = is_numeric($_field) ? $k . '.' . $field : $k . '.' . $_field;
break;
}
}
$_order[] = $field . ' ' . $sort;
}
$order = implode(',', $_order);
}
return $order;
}
/**
* 检查Group表达式中的视图字段
*
* @access protected
* @param string $group
* 字段
* @return string
*/
protected function checkGroup($group = '')
{
if (! empty($group)) {
$groups = explode(',', $group);
$_group = array();
foreach ($groups as $field) {
// 解析成视图字段
foreach ($this->viewFields as $name => $val) {
$k = isset($val['_as']) ? $val['_as'] : $name;
$val = $this->_checkFields($name, $val);
if (false !== $_field = array_search($field, $val, true)) {
// 存在视图字段
$field = is_numeric($_field) ? $k . '.' . $field : $k . '.' . $_field;
break;
}
}
$_group[] = $field;
}
$group = implode(',', $_group);
}
return $group;
}
/**
* 检查fields表达式中的视图字段
*
* @access protected
* @param string $fields
* 字段
* @return string
*/
protected function checkFields($fields = '')
{
if (empty($fields) || '*' == $fields) {
// 获取全部视图字段
$fields = array();
foreach ($this->viewFields as $name => $val) {
$k = isset($val['_as']) ? $val['_as'] : $name;
$val = $this->_checkFields($name, $val);
foreach ($val as $key => $field) {
if (is_numeric($key)) {
$fields[] = $k . '.' . $field . ' AS ' . $field;
} elseif ('_' != substr($key, 0, 1)) {
// 以_开头的为特殊定义
if (false !== strpos($key, '*') || false !== strpos($key, '(') || false !== strpos($key, '.')) {
// 如果包含* 或者 使用了sql方法 则不再添加前面的表名
$fields[] = $key . ' AS ' . $field;
} else {
$fields[] = $k . '.' . $key . ' AS ' . $field;
}
}
}
}
$fields = implode(',', $fields);
} else {
if (! is_array($fields)) {
$fields = explode(',', $fields);
}
// 解析成视图字段
$array = array();
foreach ($fields as $key => $field) {
if (strpos($field, '(') || strpos(strtolower($field), ' as ')) {
// 使用了函数或者别名
$array[] = $field;
unset($fields[$key]);
}
}
foreach ($this->viewFields as $name => $val) {
$k = isset($val['_as']) ? $val['_as'] : $name;
$val = $this->_checkFields($name, $val);
foreach ($fields as $key => $field) {
if (false !== $_field = array_search($field, $val, true)) {
// 存在视图字段
if (is_numeric($_field)) {
$array[] = $k . '.' . $field . ' AS ' . $field;
} elseif ('_' != substr($_field, 0, 1)) {
if (false !== strpos($_field, '*') || false !== strpos($_field, '(') || false !== strpos($_field, '.')) // 如果包含* 或者 使用了sql方法 则不再添加前面的表名
{
$array[] = $_field . ' AS ' . $field;
} else {
$array[] = $k . '.' . $_field . ' AS ' . $field;
}
}
}
}
}
$fields = implode(',', $array);
}
return $fields;
}
}