Update singular observers to ignore blank values

Author: navneetrai

src/Observers/BelongsToObserver.php

@@ -23,8 +23,10 @@ public function updating(Model $model, $attribute, $value)
      */
     public function creating(Model $model, $attribute, $value)
     {
-        $parentModel = $model->{$attribute}()->getRelated()->newInstance($value[0]);
-        $parentModel->save();
-        $model->{$attribute}()->associate($parentModel);
+        if (count($value)) {
+            $parentModel = $model->{$attribute}()->getRelated()->newInstance($value[0]);
+            $parentModel->save();
+            $model->{$attribute}()->associate($parentModel);
+        }
     }
 }

src/Observers/HasOneObserver.php

@@ -19,7 +19,7 @@ public function updating(Model $model, $attribute, $value)
             } else {
                 $childModel->delete();
             }
-        } else {
+        } elseif (count($value)) {
             $model->{$attribute}()->create($value[0]);
         }
     }
@@ -29,6 +29,8 @@ public function updating(Model $model, $attribute, $value)
      */
     public function created(Model $model, $attribute, $value)
     {
-        $model->{$attribute}()->create($value[0]);
+        if (count($value)) {
+            $model->{$attribute}()->create($value[0]);
+        }
     }
 }