add customer api

common/models/Event.php

@@ -111,18 +111,18 @@ class Event extends \yii\db\ActiveRecord
     }
 
     public function getEventType(){
-        return $this->hasOne(EventType::className(),['id' => 'id_event_type']);
+        return $this->hasOne($this->getEventTypeClass(),['id' => 'id_event_type']);
     }
 
     public function getTrainer(){
-        return $this->hasOne(Trainer::className(),['id' => 'id_trainer']);
+        return $this->hasOne($this->getTrainerClass(),['id' => 'id_trainer']);
     }
 
     /**
      * @return Room|\yii\db\ActiveQuery
      */
     public function getRoom() {
-        return $this->hasOne(Room::className(),['id' => 'id_room']);
+        return $this->hasOne($this->getRoomClass(),['id' => 'id_room']);
     }
 
     /**
@@ -139,16 +139,24 @@ class Event extends \yii\db\ActiveRecord
         return $this->hasMany(EventRegistration::className(),['id_event' => 'id']);
     }
 
+
+    /**
+     * @return  \common\models\EventRegistration[]|\yii\db\ActiveQuery
+     */
+    public function getActiveEventRegistrations(){
+        return $this->hasMany(EventRegistration::className(),['id_event' => 'id'])->andWhere(
+            [
+                'event_registration.canceled_at' => null,
+                'event_registration.deleted_at' => null,
+            ]
+        );
+    }
+
     /**
      * @return  \common\models\EventRegistration[]|\yii\db\ActiveQuery
      */
     public function getEventRegistrationCount(){
-        return sizeof($this->getEventRegistrations()
-            ->andWhere( [
-                'canceled_at' => null,
-                'deleted_at' => null,
-            ])
-            ->all());
+        return sizeof($this->getActiveEventRegistrations()->all());
     }
 
     public function getOpenSeatCount(){
@@ -183,4 +191,16 @@ class Event extends \yii\db\ActiveRecord
         return true;
     }
 
+
+    protected function getTrainerClass(){
+        return Trainer::class;
+    }
+    protected function getEventTypeClass(){
+        return EventType::class;
+    }
+
+    protected function getRoomClass(){
+        return Room::class;
+    }
+
 }