php - how to retrieve a value that is entered on localhost from another model -

first of all, let me clarify myself. baked on cakephp , entering values on localhost in application. basicly, there 2 models called location , temp_readings.

in location model, there temperature limits called high_temp , low_temp. , name of location. enter values, (e.g. name= fridge, low_temp= 3, high_temp= 7)

in temp_readings model, enter temperature value specific location, (e.g. temperature= 10, location= frigde).

if temp value out of limits, app sending warning email me.

i work on temp_readings.php script doing , need put condition sending email.

i think, can value of temperature writing;

 $temperature = $this->data['temp_readings']['temperature'];  

since working in temp_readings.php.

however, cannot values of low_temp , high_temp, saved under location model.

how can low_temp , high_temp values work in temp_readings.php?

here part of temp_readings.php (i dont know if helps)

class temp_readings extends appmodel {  function aftersave($created, $options = array()) {  //pr($this);  //$temperature = $this->data['temperaturereading']['temperature'];  //$low_temp=  //$high_temp=      if ($temperature > $high_temp && $temperature < $low_temp) {      $email = new cakeemail('gmail');     $email->from(array('****@gmail.com' => 'my site'));     $email->to('***@gmail.com');     $email->subject('temperature warning!');     $email->send('temperature @ critical value of');      } } 

you should have belongsto relationship between temp_readings , location, so:

class temp_readings extends appmodel {      public $belongsto = [         'location' // don't know data structure, you'll need add details here     ];      /* ... */ } 

then, after saving:

function aftersave($created, $options = array()) {     $temperature = $this->data['temperaturereading']['temperature'] ;     $location    = $this->data['location'] ;     /* ... */ } 

of course, code needs changes because don't know database structure should give hint on should do.