Merge pull request #7017 from kenjis/docs-update-tutorial

docs: update tutorial

Author: kenjis

user_guide_src/source/tutorial/create_news_items.rst

@@ -90,7 +90,8 @@ Most helper functions require the helper to be loaded before use.
 Next, we check if we deal with the **POST** request with the
 :doc:`IncomingRequest <../incoming/incomingrequest>` object ``$this->request``.
 It is set in the controller by the framework.
-If the HTTP method is not POST, that is it is GET,
+The :ref:`IncomingRequest::is() <incomingrequest-is>` method checks the type of the request.
+Since the route for **create()** endpoint handles both: **GET** and **POST** requests we can safely assume that if the request is not POST then it is a GET type.
 the form is loaded and returned to display.
 
 Then, we get the necessary items from the POST data by the user and set them in the ``$post`` variable.

user_guide_src/source/tutorial/create_news_items/002.php

@@ -13,7 +13,7 @@ public function create()
         helper('form');
 
         // Checks whether the form is submitted.
-        if (strtolower($this->request->getMethod()) !== 'post') {
+        if (! $this->request->is('post')) {
             // The form is not submitted, so returns the form.
             return view('templates/header', ['title' => 'Create a news item'])
                 . view('news/create')
@@ -24,8 +24,8 @@ public function create()
 
         // Checks whether the submitted data passed the validation rules.
         if (! $this->validateData($post, [
-            'title' => 'required|min_length[3]|max_length[255]',
-            'body'  => 'required|min_length[10]|max_length[5000]',
+            'title' => 'required|max_length[255]|min_length[3]',
+            'body'  => 'required|max_length[5000]|min_length[10]',
         ])) {
             // The validation fails, so returns the form.
             return view('templates/header', ['title' => 'Create a news item'])