/**
* 获取返回数据的关联记录
* @access protected
* @param mixed $result 返回数据
* @param string|array $name 关联名称
* @param boolean $return 是否返回关联数据本身
* @return array
*/
protected function getRelation(&$result, $name = '', $return = false)
{
if (!empty($this->_link)) {
foreach ($this->_link as $key => $val) {
$mappingName = !empty($val['mapping_name']) ? $val['mapping_name'] : $key;
// 映射名称
if (empty($name) || true === $name || $mappingName == $name || is_array($name) && in_array($mappingName, $name)) {
$mappingType = !empty($val['mapping_type']) ? $val['mapping_type'] : $val;
// 关联类型
$mappingClass = !empty($val['class_name']) ? $val['class_name'] : $key;
// 关联类名
$mappingFields = !empty($val['mapping_fields']) ? $val['mapping_fields'] : '*';
// 映射字段
$mappingCondition = !empty($val['condition']) ? $val['condition'] : '1=1';
// 关联条件
$mappingKey = !empty($val['mapping_key']) ? $val['mapping_key'] : $this->getPk();
// 关联键名
if (strtoupper($mappingClass) == strtoupper($this->name)) {
// 自引用关联 获取父键名
$mappingFk = !empty($val['parent_key']) ? $val['parent_key'] : 'parent_id';
} else {
$mappingFk = !empty($val['foreign_key']) ? $val['foreign_key'] : strtolower($this->name) . '_id';
// 关联外键
}
// 获取关联模型对象
$model = D($mappingClass);
switch ($mappingType) {
case self::HAS_ONE:
$pk = $result[$mappingKey];
$mappingCondition .= " AND {$mappingFk}='{$pk}'";
$relationData = $model->cache(true, 2)->where($mappingCondition)->field($mappingFields)->find();
if (!empty($val['relation_deep'])) {
$model->getRelation($relationData, $val['relation_deep']);
}
break;
case self::BELONGS_TO:
if (strtoupper($mappingClass) == strtoupper($this->name)) {
// 自引用关联 获取父键名
$mappingFk = !empty($val['parent_key']) ? $val['parent_key'] : 'parent_id';
} else {
$mappingFk = !empty($val['foreign_key']) ? $val['foreign_key'] : strtolower($model->getModelName()) . '_id';
// 关联外键
}
//TODO Patch for thinkphp3.2 by GREENCMS
$mapping_foreign_key = !empty($val['mapping_foreign_key']) ? $val['mapping_foreign_key'] : $model->getPk();
$fk = $result[$mappingFk];
$mappingCondition .= " AND {$mapping_foreign_key}='{$fk}'";
$relationData = $model->cache(true, 2)->where($mappingCondition)->field($mappingFields)->find();
if (!empty($val['relation_deep'])) {
$model->getRelation($relationData, $val['relation_deep']);
}
break;
case self::HAS_MANY:
$pk = $result[$mappingKey];
$mappingCondition .= " AND {$mappingFk}='{$pk}'";
$mappingOrder = !empty($val['mapping_order']) ? $val['mapping_order'] : '';
$mappingLimit = !empty($val['mapping_limit']) ? $val['mapping_limit'] : '';
// 延时获取关联记录
$relationData = $model->cache(true, 2)->where($mappingCondition)->field($mappingFields)->order($mappingOrder)->limit($mappingLimit)->select();
if (!empty($val['relation_deep'])) {
foreach ($relationData as $key => $data) {
$model->getRelation($data, $val['relation_deep']);
$relationData[$key] = $data;
}
}
break;
case self::MANY_TO_MANY:
$pk = $result[$mappingKey];
$prefix = $this->tablePrefix;
$mappingCondition = " {$mappingFk}='{$pk}'";
$mappingOrder = $val['mapping_order'];
$mappingLimit = $val['mapping_limit'];
$mappingRelationFk = $val['relation_foreign_key'] ? $val['relation_foreign_key'] : $model->getModelName() . '_id';
if (isset($val['relation_table'])) {
$mappingRelationTable = preg_replace_callback("/__([A-Z_-]+)__/sU", function ($match) use($prefix) {
return $prefix . strtolower($match[1]);
}, $val['relation_table']);
} else {
$mappingRelationTable = $this->getRelationTableName($model);
}
$mappingRelationTable = $prefix . $mappingRelationTable;
$sql = "SELECT b.{$mappingFields} FROM {$mappingRelationTable} AS a, " . $model->getTableName() . " AS b WHERE a.{$mappingRelationFk} = b.{$model->getPk()} AND a.{$mappingCondition}";
if (!empty($val['condition'])) {
$sql .= ' AND ' . $val['condition'];
}
if (!empty($mappingOrder)) {
$sql .= ' ORDER BY ' . $mappingOrder;
}
if (!empty($mappingLimit)) {
$sql .= ' LIMIT ' . $mappingLimit;
}
//缓存key
// $cache_key=md5($sql);
//
// if (S($cache_key)) {
// // echo "cache hit $cache_key : $sql <br />";
// $relationData = S($sql);
// if($relationData=="none"){
// $relationData=array();
// }else{
// $relationData= S($cache_key);
// }
//
// } else {
// // echo "cache miss $cache_key : $sql <br />";
//
// $relationData = $this->query($sql);
//
// if(empty($relationData)){
// S($cache_key, "none", array('expire'=>get_opinion("DATA_CACHE_TIME")));
// }else{
// S($cache_key, $relationData, array('expire'=>get_opinion("DATA_CACHE_TIME")));
// }
// }
if ($key == 'Cat') {
//key: relation_post_cat_$post_id
// dump($mappingFk);
// dump($pk);
$relationData = CacheManager::getPostCatRelation($pk);
if ($relationData == 'none') {
// echo "Cat cache none {$pk} <br />";
$relationData = array();
} else {
if ($relationData) {
// echo "Cat cache hit {$pk}<br />";
} else {
$relationData = $this->query($sql);
if (empty($relationData)) {
// echo "Cat is empty {$pk} <br />";
CacheManager::setPostCatRelation($pk, 'none');
} else {
// echo "Cat cache missed {$pk} <br />";
CacheManager::setPostCatRelation($pk, $relationData);
}
}
}
} else {
if ($key == 'Tag') {
//key: relation_post_tag_$post_id
$relationData = CacheManager::getPostTagRelation($pk);
if ($relationData == 'none') {
// echo "Tag cache none {$pk} <br />";
$relationData = array();
} else {
if ($relationData) {
// echo "Tag cache hit {$pk}<br />";
} else {
$relationData = $this->query($sql);
if (empty($relationData)) {
// echo "Tag is empty {$pk} <br />";
CacheManager::setPostTagRelation($pk, 'none');
} else {
// echo "Tag cache missed {$pk} <br />";
CacheManager::setPostTagRelation($pk, $relationData);
}
}
}
} else {
// echo "no cache cover";
//todo improve performance
$relationData = $this->query($sql);
}
}
if (!empty($val['relation_deep'])) {
foreach ($relationData as $key => $data) {
$model->getRelation($data, $val['relation_deep']);
$relationData[$key] = $data;
}
}
break;
}
if (!$return) {
if (isset($val['as_fields']) && in_array($mappingType, array(self::HAS_ONE, self::BELONGS_TO))) {
// 支持直接把关联的字段值映射成数据对象中的某个字段
// 仅仅支持HAS_ONE BELONGS_TO
$fields = explode(',', $val['as_fields']);
foreach ($fields as $field) {
if (strpos($field, ':')) {
list($relationName, $nick) = explode(':', $field);
$result[$nick] = $relationData[$relationName];
} else {
$result[$field] = $relationData[$field];
}
}
} else {
$result[$mappingName] = $relationData;
}
unset($relationData);
} else {
return $relationData;
}
}
}
}
return $result;
}
