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Difference between revisions of "Developing a MVC Component/Adding a variable request in the menu type"

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< J2.5:Developing a MVC Component
(Adding a variable request in the menu type)
(Adding a variable request in the menu type)
Line 48: Line 48:
 
// No direct access to this file
 
// No direct access to this file
 
defined('_JEXEC') or die('Restricted access');
 
defined('_JEXEC') or die('Restricted access');
 +
 
// import Joomla modelitem library
 
// import Joomla modelitem library
 
jimport('joomla.application.component.modelitem');
 
jimport('joomla.application.component.modelitem');
// inherit the JModelItem class
+
 
 +
/**
 +
* HelloWorld Model
 +
*/
 
class HelloWorldModelHelloWorld extends JModelItem
 
class HelloWorldModelHelloWorld extends JModelItem
 
{
 
{
Line 57: Line 61:
 
*/
 
*/
 
protected $msg;
 
protected $msg;
 +
 
/**
 
/**
 
* Get the message
 
* Get the message

Revision as of 19:07, 21 November 2010

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Articles in this series


Introduction

This tutorial is part of the Developing a Model-View-Controller (MVC) Component for Joomla!1.6 tutorial. You are encouraged to read the previous parts of the tutorial before reading this.

Adding a variable request in the menu type

For the moment, the displayed message is always Hello World!. Joomla!1.6 gives the possibility to add parameters to menu types. In our case, this is done in the site/views/helloworld/tmpl/default.xml file:

site/views/helloworld/tmpl/default.xml

<?xml version="1.0" encoding="utf-8"?>
<metadata>
        <layout title="COM_HELLOWORLD_HELLOWORLD_VIEW_DEFAULT_TITLE">
                <message>COM_HELLOWORLD_HELLOWORLD_VIEW_DEFAULT_DESC</message>
        </layout>
        <fields name="request">
                <fieldset name="request">
                        <field
                                name="id"
                                type="list"
                                label="COM_HELLOWORLD_HELLOWORLD_FIELD_GREETING_LABEL"
                                description="COM_HELLOWORLD_HELLOWORLD_FIELD_GREETING_DESC"
                                default="1"
                        >
                                <option value="1">Hello World!</option>
                                <option value="2">Good bye World!</option>
                        </field>
                </fieldset>
        </fields>
</metadata>

Note two important information:

  • the request group that indicates mandatory fields
  • the array parameter that indicates that these parameters will be added in the request URL

The model has to be modified in order to choose between the two different messages:

site/models/helloworld.php

<?php
// No direct access to this file
defined('_JEXEC') or die('Restricted access');
 
// import Joomla modelitem library
jimport('joomla.application.component.modelitem');
 
/**
 * HelloWorld Model
 */
class HelloWorldModelHelloWorld extends JModelItem
{
        /**
         * @var string msg
         */
        protected $msg;
 
        /**
         * Get the message
         * @return string The message to be displayed to the user
         */
        public function getMsg() 
        {
                if (!isset($this->msg)) 
                {
                        $id = JRequest::getInt('id');
                        switch ($id) 
                        {
                        case 2:
                                $this->msg = 'Good bye World!';
                        break;
                        default:
                        case 1:
                                $this->msg = 'Hello World!';
                        break;
                        }
                }
                return $this->msg;
        }
}

Also modify your helloworld.xml file to indicate the new version:

helloworld.xml

<?xml version="1.0" encoding="utf-8"?>
<extension type="component" version="1.6.0" method="upgrade">
        <name>Hello World!</name>
        <creationDate>November 2009</creationDate>
        <author>John Doe</author>
        <authorEmail>john.doe@example.org</authorEmail>
        <authorUrl>http://www.example.org</authorUrl>
        <copyright>Copyright Info</copyright>
        <license>License Info</license>
        <version>0.0.5</version>
        <description>Description of the Hello World component ...</description>
 
        <files folder="site">
                <filename>index.html</filename>
                <filename>helloworld.php</filename>
                <filename>controller.php</filename>
                <folder>views</folder>
                <folder>models</folder>
        </files>
 
        <administration>
                <menu>Hello World!</menu>
                <files folder="admin">
                        <filename>index.html</filename>
                        <filename>helloworld.php</filename>
                </files>                
        </administration>
</extension>

You can test this variable request by putting index.php?option=com_helloworld&id=1 or index.php?option=com_helloworld&id=2 in your browser address.

Packaging the component

Content of your code directory

Create a compressed file of this directory or directly download the archive and install it using the extension manager of Joomla!1.6. You can add a menu item of this component using the menu manager in the backend.

Navigate

Prev: Adding a model to the site part Next: Using the database

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