feat: implement issue #

application/Measurement/Measurement.php

@@ -0,0 +1,53 @@
+<?php
+
+class Measurement extends mfBaseModel
+{
+    private $device;
+    private $sensor;
+
+    public function getProperty($name)
+    {
+        if ($this->$name == null) {
+            if (!$this->id) {
+                return null;
+            }
+
+            if($name == "device") {
+                $this->device = mfValuecache::singleton()->get("Device-id-".$this->device_id);
+                if($this->device === null) {
+                    $this->device = new Device($this->device_id);
+                    if($this->device->id) {
+                        mfValuecache::singleton()->set("Device-id-".$this->device_id, $this->device);
+                    }
+                }
+                return $this->device;
+            }
+
+            if($name == "sensor") {
+                // Sensor would be a separate entity if it exists
+                // For now, just return the sensor_id
+                return $this->sensor_id;
+            }
+
+            $classname = ucfirst($name);
+            $idfield = $name."_id";
+            if(property_exists($this->data, $idfield)) {
+                $this->$name = mfValuecache::singleton()->get("mfObjectmodel-$name-".$this->$idfield);
+                if(!$this->$name) {
+                    $this->$name = new $classname($this->$idfield);
+                }
+
+                if($this->$name->id) {
+                    mfValuecache::singleton()->set("mfObjectmodel-$name-".$this->$name->id, $this->$name);
+                    return $this->$name;
+                } else {
+                    return null;
+                }
+            }
+
+            return null;
+        }
+
+        return $this->$name;
+    }
+}