Cakephp 中关联 Table 的多个引用

Question

将两个 tables（属于天气雷达站点的许多天气雷达帧）与 belongsTo 和 hasMany 相关联后，我希望生成带有两个 "contains" 的 JSON相同 table （和不同的条件）所以我只能列出具有特定条件的帧。我目前拥有的不起作用；它只将第二个包含写入 JSON.

雷达站点Table:

...
public function initialize(array $config)
{
    parent::initialize($config);

    $this->setTable('radar_site');

    $this->setDisplayField('radar_id');
    $this->setPrimaryKey('radar_id');

    $this->hasMany('FutureFrame', [
        'foreignKey' => 'radar_id'
    ]);

    $this->hasMany('RadarFrame', [
        'foreignKey' => 'radar_id'
    ]);
}
...

雷达坐标系Table:

public function initialize(array $config)
{
    parent::initialize($config);

    $this->setTable('radar_frame');

    $this->setDisplayField('radar_id');
    $this->setPrimaryKey('radar_id');

    $this->belongsTo('RadarSite', [
        'foreignKey' => 'radar_id'
    ]);
}

控制器：

public function getRadarData()
{
    $radarInfo = 
    $this->RadarSite->find(
        'all',
        [
            'contain' => [
                'RadarFrame' =>[
                    'sort' => ['RadarFrame.frame_time' => 'DESC'],
                    'conditions' => [
                        'RadarFrame.frame_time >' => time() - 60*60,
                        'RadarFrame.file_on_server =' => 1,
                        'RadarFrame.radar_type =' => 'velocity'
                    ]
                ],
                'RadarFrame' =>[
                    'sort' => ['RadarFrame.frame_time' => 'DESC'],
                    'conditions' => [
                        'RadarFrame.frame_time >' => time() - 60*60,
                        'RadarFrame.file_on_server =' => 1,
                        'RadarFrame.radar_type =' => 'reflectivity'
                    ]
                ]                   
            ]
        ]

    );    
    $this->set('radarInfo', $radarInfo);
}

JSON 输出：

 ...,{
        "radar_id": "KHGX",
        "radar_name": "Houston\/Galveston, TX",
        "elevation": 18,
        "tower_height": 20,
        "max_latitude": 31.6485,
        "min_latitude": 27.2476,
        "max_longitude": -92.4946,
        "min_longitude": -97.6634,
        "latitude": 29.4719,
        "longitude": -95.0792,
        "radar_frame": [
            {
                "radar_id": "KHGX",
                "radar_type": "reflectivity",
                "frame_time": 1495473662,
                "is_analyzed": 1,
                "average_speed": null,
                "average_direction": null,
                "file_on_server": 1
            },
            {
                "radar_id": "KHGX",
                "radar_type": "reflectivity",
                "frame_time": 1495473305,
                "is_analyzed": 1,
                "average_speed": null,
                "average_direction": null,
                "file_on_server": 1
            },
            {
                "radar_id": "KHGX",
                "radar_type": "reflectivity",
                "frame_time": 1495473002,
                "is_analyzed": 1,
                "average_speed": null,
                "average_direction": null,
                "file_on_server": 1
            }
        ]
    },...

正确的做法是什么？有没有一种简单的方法可以向我的控制器添加别名以区分两个包含查询？我正在使用 CakePHP 3.0。

谢谢！！

Answer 1

由于您的条件是静态的，您可以将它们放入关系中：

雷达站点Table:

public function initialize(array $config)
{
    parent::initialize($config);

    $this->setTable('radar_site');

    $this->setDisplayField('radar_id');
    $this->setPrimaryKey('radar_id');

    $this->hasMany('FutureFrame', [
        'foreignKey' => 'radar_id'
    ]);

    $this->hasMany('RadarFrameVelocity', [
       'className' => 'RadarFrame',
       'foreignKey' => 'radar_id',
       'conditions' => [
            'RadarFrame.frame_time >' => time() - 60*60,
            'RadarFrame.file_on_server =' => 1,
            'RadarFrame.radar_type =' => 'velocity'
        ]
    ]);

    $this->hasMany('RadarFrameReflectivity', [
        'className' => 'RadarFrame',
        'foreignKey' => 'radar_id',
        'conditions' => [
            'RadarFrame.frame_time >' => time() - 60*60,
            'RadarFrame.file_on_server =' => 1,
            'RadarFrame.radar_type =' => 'reflectivity'
        ]
    ]);
}

控制器：

public function getRadarData()
{
    $radarInfo = 
    $this->RadarSite->find(
        'all',
        [
            'contain' => [
                'RadarFrameVelocity' =>[
                    'sort' => ['RadarFrameVelocity.frame_time' => 'DESC']
                ],
                'RadarFrameReflectivity' => [
                    'sort' => ['RadarFrameReflectivity.frame_time' => 'DESC']
                ]                   
            ]
        ]

    );    
    $this->set('radarInfo', $radarInfo);
}

另见 Associations - Linking Tables Together

Cakephp 中关联 Table 的多个引用

Multiple References to Associated Table in Cakephp

json

cakephp

associations

cakephp-3.0

contain