implement registration in backend

common/models/Event.php

@@ -18,7 +18,10 @@ use yii\helpers\ArrayHelper;
  * @property integer $seat_count
  * @property string $created_at
  * @property string $updated_at
- * @property \common\models\EventType eventType
+ * @property \common\models\EventType $eventType
+ * @property \common\models\Trainer $trainer
+ * @property \common\models\Room $room
+ * @property \common\models\EventRegistration[] $eventRegistrations
  */
 class Event extends \yii\db\ActiveRecord
 {
@@ -45,7 +48,8 @@ class Event extends \yii\db\ActiveRecord
         return [
             [['startDateString',], 'date', 'format' => Yii::$app->formatter->datetimeFormat, 'timestampAttribute' => 'start',   'timeZone' => 'UTC'],
             [['endDateString',], 'date', 'format' => Yii::$app->formatter->datetimeFormat, 'timestampAttribute' => 'end' ,  'timeZone' => 'UTC'],
-            [['id_trainer','id_room', 'id_event_type'], 'required'],
+            [['id_trainer','id_room', 'id_event_type','seat_count'], 'required'],
+            [['id_trainer','id_room', 'id_event_type','seat_count'], 'integer'],
         ];
     }
 
@@ -72,6 +76,7 @@ class Event extends \yii\db\ActiveRecord
             'startDateString' => Yii::t('event', 'Start'),
             'endDateString' => Yii::t('event', 'End'),
             'status' => Yii::t('event', 'Status'),
+            'seat_count' => Yii::t('event', 'Seat Count'),
         ];
     }
 
@@ -127,13 +132,18 @@ class Event extends \yii\db\ActiveRecord
      * @return  \common\models\EventRegistration[]|\yii\db\ActiveQuery
      */
     public function getEventRegistrationCount(){
-        return sizeof($this->getEventRegistrations());
+        return sizeof($this->eventRegistrations);
     }
 
     public function hasFreeSeats(){
-        $registrationCount = $this->getEventRegistrations() ;
+        $registrationCount = sizeof($this->eventRegistrations) ;
 
-        return  $registrationCount < $this->seat_count ;
+        $seatCount = $this->seat_count;
+        if ( !isset($seatCount ) || $seatCount == 0){
+            $seatCount = PHP_INT_MAX;
+        }
+
+        return  $registrationCount <   $seatCount ;
     }
 
 }