added tests

README.md

@@ -71,24 +71,22 @@ class CreatePostsTable extends Migration
 }
 ```
 
-Then, when you create a new model, a Post in this case, your function would look something like this:
+Then, just create a model like usual:
 
 ``` php
 public function createPost () {
     $post = Post::create([
         // post data
     ]);
-    
-    $post->setUuid();
 }
 ```
 
-You now have access to a universal identifier for every model in the entire project.
+But now, you have access to a universal identifier for every model in the entire project.
 
 You can check if a model has a UUID, and get it if it does:
 ``` php
 $post->hasUuid(); // returns true or false
-$post->getUuid(); // returns the UUID if it exists, else null
+$post->getUuid(); // returns the UUID
 ```
 
 The other big feature of the Meta model is saving meta information.