Question

我正在研究cakephp问题。我知道我们如何在cakephp中进行查询。在某些情况下，您必须使用sql语句本身作为查询（$ sql）。以下是从数据库中获取最近点的查询。 SQL工作正常。现在，我希望以cakephp风格添加常见的分页形式cakephp。很遗憾，我找不到任何有关如何操作的信息。一般来说，要找到这样的信息并不容易。所以我不想要你的解决方案，我很乐意获得如何将复杂的查询转换为cakephp的链接。

这是我的codesnippet（正如前面提到的那样）。

    public function getRestAroundMe($lat, $lng, $radius, $limit) {  // Get some data to validate login.
        /* Source: http://funkjedi.com/technology/308-search-using-geolocation-data-in-mysql/ */

        // Constants related to the surface of the Earth
        $earths_radius = 6371;
        $surface_distance_coeffient = 111.320;

        // Spherical Law of Cosines
        $distance_formula = sprintf('%s * ACOS( SIN(RADIANS(geolatitude)) * SIN(RADIANS(%s)) + COS(RADIANS(geolongitude - %s)) * COS(RADIANS(geolatitude)) * COS(RADIANS(%s)) )', $earths_radius, $lat, $lng, $lat); 

        // Create a bounding box to reduce the scope of our search
        $lng_b1 = $lng - $radius / abs(cos(deg2rad($lat)) * $surface_distance_coeffient);
        $lng_b2 = $lng + $radius / abs(cos(deg2rad($lat)) * $surface_distance_coeffient);
        $lat_b1 = $lat - $radius / $surface_distance_coeffient;
        $lat_b2 = $lat + $radius / $surface_distance_coeffient;

        // Construct our sql statement
        $sql = sprintf('SELECT *, (%s) AS distance FROM restaurants AS Restaurant WHERE (geolatitude BETWEEN %s AND %s) AND (geolongitude BETWEEN %s AND %s) HAVING distance < %s ORDER BY distance ASC LIMIT 0, %s', $distance_formula, $lat_b1, $lat_b2, $lng_b1, $lng_b2, $radius, $limit);

        return $this->query($sql);
}

感谢您的帮助

Answer 1

现在我有了解决方案：

    public function geoRest($lat, $lng, $radius, $limit) {
        /* Source: http://funkjedi.com/technology/308-search-using-geolocation-data-in-mysql/ */

        // Constants related to the surface of the Earth
        $earths_radius = 6371;
        $surface_distance_coeffient = 111.320;

        // Spherical Law of Cosines
        //$distance_formula ='$earths_radius * ACOS( SIN(RADIANS(geolatitude)) * SIN(RADIANS($lat)) + COS(RADIANS(geolongitude - $lng)) * COS(RADIANS(geolatitude)) * COS(RADIANS($lat)) )';
        $distance_formula = sprintf('%s * ACOS( SIN(RADIANS(geolatitude)) * SIN(RADIANS(%s)) + COS(RADIANS(geolongitude - %s)) * COS(RADIANS(geolatitude)) * COS(RADIANS(%s)) )', $earths_radius, $lat, $lng, $lat); 
        // Create a bounding box to reduce the scope of our search
        $lng_b1 = $lng - $radius / abs(cos(deg2rad($lat)) * $surface_distance_coeffient);
        $lng_b2 = $lng + $radius / abs(cos(deg2rad($lat)) * $surface_distance_coeffient);
        $lat_b1 = $lat - $radius / $surface_distance_coeffient;
        $lat_b2 = $lat + $radius / $surface_distance_coeffient;

        // Construct our sql statement
        //$sql = sprintf('SELECT *, (%s) AS distance FROM restaurants AS Restaurant WHERE (geolatitude BETWEEN %s AND %s) AND (geolongitude BETWEEN %s AND %s) HAVING distance < %s ORDER BY distance ASC LIMIT 0, %s', $distance_formula, $lat_b1, $lat_b2, $lng_b1, $lng_b2, $radius, $limit);
        //return $this->query($sql);
        //$options['fields'] = array('*',$distance_formula.' AS distance');

        $this->virtualFields['distance'] = $distance_formula;
        $options['fields'] = array('*');
        $options['conditions'] = array(
                            'Restaurant.geolatitude BETWEEN ? AND ?' => array($lat_b1, $lat_b2),
                            'AND' => array('Restaurant.geolongitude BETWEEN ? AND ?' => array($lng_b1, $lng_b2)),
                            'AND' => array('NOT' => array('Restaurant.geolongitude' => 0)),
                            'AND' => array('NOT' => array('Restaurant.geolatitude' => 0)),
                            'AND' => array('NOT' => array('Restaurant.geolongitude' => null)),
                            'AND' => array('NOT' => array('Restaurant.geolatitude' => null))
                            );
        $options['contain'] = array(
                            'Menu' => array(
                                            'conditions' => array(
                                                                  'Menu.active' => '1'
                                                                  )
                                            )
        );

        $options['order'] = 'Restaurant.distance ASC';
        $options['limit'] = $limit;

        //return $options;

        return $this->find('all', $options);

不幸的是'包含'不起作用，但那是我正在研究的另一个问题。如果有人有解决方案那就太棒了！

Answer 2

看看Custom query pagination。有一些方法可以使用自定义查询进行分页。

cakephp风格的SQL查询

2 个答案: