Multiple References to Associated Table in Cakephp - json

Question

After associating two tables (many weather radar frames which belong to weather radar sites) with belongsTo and hasMany, I was hoping to generate JSON with two "contains" on the same table (and different conditions) so I can list only the frames which have specific conditions. What I currently have doesn't work; it only writes the second contain to the JSON.
Radar Site 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'
]);
}
...
Radar Frame 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'
]);
}
Controller:
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 output:
...,{
"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
}
]
},...
What's the right way to do this? Is there an easy way to add an alias to my controller to differentiate between the two contain queries? I am using CakePHP 3.0.
Thank you!!

Answer 1

Since your conditions are statics, you could put them into the relationship:
Radar Site 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'
]
]);
}
Controller:
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);
}
See also Associations - Linking Tables Together