Adds an init event, needed for extensibility

1. Model constructed
2. Model ::extend called
3. Model initializes

src/Database/Concerns/HasEvents.php

@@ -55,6 +55,15 @@ protected function bootNicerEvents()
         static::$eventsBooted[$class] = true;
     }
 
+    /**
+     * initializeModelEvent is called every time the model is constructed.
+     */
+    protected function initializeModelEvent()
+    {
+        $this->fireEvent('model.afterInit');
+        $this->afterInit();
+    }
+
     /**
      * flushEventListeners removes all of the event listeners for the model
      * Also flush registry of models that had events booted
@@ -104,8 +113,7 @@ public static function fetched($callback)
     }
 
     /**
-     * afterBoot is called after the model is constructed, a nicer version
-     * of overriding the __construct method.
+     * afterBoot is called after the model is constructed for the first time.
      */
     protected function afterBoot()
     {
@@ -122,6 +130,25 @@ protected function afterBoot()
          */
     }
 
+    /**
+     * afterInit is called after the model is constructed, a nicer version
+     * of overriding the __construct method.
+     */
+    protected function afterInit()
+    {
+        /**
+         * @event model.afterInit
+         * Called after the model is initialized
+         *
+         * Example usage:
+         *
+         *     $model->bindEvent('model.afterInit', function () use (\October\Rain\Database\Model $model) {
+         *         \Log::info(get_class($model) . ' has initialized');
+         *     });
+         *
+         */
+    }
+
     /**
      * beforeCreate handles the "creating" model event
      */

src/Database/Model.php

@@ -61,6 +61,8 @@ public function __construct(array $attributes = [])
 
         $this->extendableConstruct();
 
+        $this->initializeModelEvent();
+
         $this->fill($attributes);
     }
 
@@ -530,5 +532,7 @@ public function __wakeup()
         $this->bootNicerEvents();
 
         $this->extendableConstruct();
+
+        $this->initializeModelEvent();
     }
 }

src/Database/Traits/SortableRelation.php

@@ -32,6 +32,10 @@ trait SortableRelation
      */
     public function initializeSortableRelation()
     {
+        $this->bindEvent('model.afterInit', function() {
+            $this->defineSortableRelations();
+        });
+
         $this->bindEvent('model.relation.attach', function ($relationName, $attached, $data) {
             if (!array_key_exists($relationName, $this->getSortableRelations())) {
                 return;
@@ -45,8 +49,6 @@ public function initializeSortableRelation()
                 $this->$relationName()->updateExistingPivot($id, [$column => ++$order]);
             }
         });
-
-        $this->defineSortableRelations();
     }
 
     /**