- ArrayOf errors now catched in EntityTrait (event soon to be attached to it)

- Fixed some non-nullable defaulted to null vars in functions
- Added a new diff method for entities which skips nullable values if they are not defined.

src/Attribute/Property/ArrayOf.php

@@ -25,22 +25,26 @@ class ArrayOf implements \Ulmus\Entity\EntityValueModifier
                             sprintf("Given item '%s' is not a valid enum for type %s ; try one of theses instead : %s", $item, $this->type, implode("', '", array_map(fn($e) => $e->value, $this->type::cases())))
                         );
                     } else {
-                        $value = $this->type::from($item);
+                        $obj = $this->type::from($item);
                     }
                 }
                 elseif (class_exists($this->type)) {
                     if (is_subclass_of($this->type, JsonUnserializable::class)) {
-                        $value = (new \ReflectionClass($this->type))->newInstanceWithoutConstructor();
-                        $value->jsonUnserialize($item);
+                        $obj = (new \ReflectionClass($this->type))->newInstanceWithoutConstructor();
+                        $obj->jsonUnserialize($item);
                     }
                     else {
-                        $value = new $this->type($item);
+                        $obj = new $this->type($item);
                     }
                 }
+                else {
+                    throw new \InvalidArgumentException("Given type for ArrayOf is incompatible with it's use. An object should be provided");
+                }
 
-                $return[$index] = $value;
+                $return[$index] = $obj;
             }
         }
+
         if (! $property->type->builtIn) {
             $cls = $property->type->type;