php - 使用 ORM 将距离 SQL 函数转换为 Cake 友好查询

Question

我正在尝试将以下 SQL 字符串转换为 Cake 查找查询。有没有简单的方法可以做到这一点？

SELECT longitude, latitude, firstname, surname, profile_pic, facebook_id, distance 
                FROM 
              (SELECT longitude, latitude, firstname, surname, profile_pic, facebook_id, 6371 * ACos( Cos( RADIANS( users.latitude ) ) * Cos( RADIANS( $latitude ) ) * Cos( RADIANS( $longitude ) - RADIANS( users.longitude ) ) + Sin( RADIANS( users.latitude ) ) * Sin( RADIANS( $latitude ) ) ) AS distance
               FROM users
              ) as users
              WHERE distance <=2 AND facebook_id != $facebook
              ORDER BY distance
              LIMIT 20

Answer 1

我有一个代码片段做类似的事情:

$GeoCache->virtualFields = array(
    'distance' => "SQRT(POW(UserGeolocationCache.latitude - {$latitude},2) + POW(UserGeolocationCache.longitude - {$longitude},2))"
);
$users = $GeoCache->find('all', array(
    'conditions' => array('distance <' => '0.05'),
    'order' => array('distance asc'),
    'contain' => array('User'),
));

TL;DR 只需将距离计算填充到虚拟字段中并对其进行搜索即可。