Actions

J2.5

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

From Joomla! Documentation

< J2.5:Developing a MVC Component
(Adding a variable request in the menu type)
(Adding a variable request in the menu type: added parentheses to get_magic_quotes_gpc() function call)
 
(41 intermediate revisions by 17 users not shown)
Line 1: Line 1:
{{underconstruction}}
+
{{version/tutor|2.5}}
{{future|1.6}}
+
{{Chunk:Developing a Model-View-Controller (MVC) Component for Joomla!2.5 - Contents}}
 
+
== Articles in this series ==
+
{{Chunk:Developing a Model-View-Controller (MVC) Component for Joomla!1.6 - Contents}}
+
  
 
== Introduction ==
 
== 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.
+
This tutorial is part of the [[Developing a Model-View-Controller (MVC) Component for Joomla!2.5]] tutorial. You are encouraged to read the previous parts of the tutorial before reading this.
  
 
== Adding a variable request in the menu type ==
 
== 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:
+
For the moment, the displayed message is always ''Hello World!''. Joomla!2.5 gives the possibility to add parameters to menu types. In our case, this is done in the ''site/views/helloworld/tmpl/default.xml'' file:
  
 
<span id="site/views/helloworld/tmpl/default.xml">
 
<span id="site/views/helloworld/tmpl/default.xml">
Line 22: Line 19:
 
<fieldset name="request">
 
<fieldset name="request">
 
<field
 
<field
id="id"
 
 
name="id"
 
name="id"
 
type="list"
 
type="list"
label="COM_HELLOWORLD_HELLOWORLD_VIEW_DEFAULT_MSG_LABEL"
+
label="COM_HELLOWORLD_HELLOWORLD_FIELD_GREETING_LABEL"
description="COM_HELLOWORLD_HELLOWORLD_VIEW_DEFAULT_MSG_DESC"
+
description="COM_HELLOWORLD_HELLOWORLD_FIELD_GREETING_DESC"
 
default="1"
 
default="1"
 
>
 
>
Line 34: Line 30:
 
</fieldset>
 
</fieldset>
 
</fields>
 
</fields>
 
 
</metadata>
 
</metadata>
 
</source>
 
</source>
 
</span>
 
</span>
  
Note two important information:
+
Two important things to note:
* the ''request'' group that indicates mandatory fields
+
* the ''request'' group of fields indicates mandatory fields
* the ''array'' parameter that indicates that these parameters will be added in the request URL
+
* the name attribute can be passed to the component in the URL. In this case ''?option=com_helloworld&id=1'' would indicate that you had chosen option 1.
  
The model has to be modified in order to choose between the two different messages:
+
The model has to be modified in order to switch between the two different messages (which is chosen by the user with the field defined above):
  
 
<span id="site/models/helloworld.php">
 
<span id="site/models/helloworld.php">
Line 51: Line 46:
 
// 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 60: Line 59:
 
*/
 
*/
 
protected $msg;
 
protected $msg;
 +
 
/**
 
/**
 
* Get the message
 
* Get the message
Line 68: Line 68:
 
if (!isset($this->msg))  
 
if (!isset($this->msg))  
 
{
 
{
$id = JRequest::getInt('id');
+
//Uses JInput if magic quotes is turned off. Falls back to use JRequest.
 +
if(!get_magic_quotes_gpc()) {
 +
$id = JFactory::getApplication()->input->get('id', 1, 'INT' );
 +
} else {
 +
$id = JRequest::getInt('id');
 +
}
 +
 
 
switch ($id)  
 
switch ($id)  
 
{
 
{
Line 92: Line 98:
 
<source lang="xml">
 
<source lang="xml">
 
<?xml version="1.0" encoding="utf-8"?>
 
<?xml version="1.0" encoding="utf-8"?>
<extension type="component" version="1.6.0" method="upgrade">
+
<extension type="component" version="2.5.0" method="upgrade">
 +
 
 
<name>Hello World!</name>
 
<name>Hello World!</name>
 +
<!-- The following elements are optional and free of formatting constraints -->
 
<creationDate>November 2009</creationDate>
 
<creationDate>November 2009</creationDate>
 
<author>John Doe</author>
 
<author>John Doe</author>
Line 100: Line 108:
 
<copyright>Copyright Info</copyright>
 
<copyright>Copyright Info</copyright>
 
<license>License Info</license>
 
<license>License Info</license>
 +
<!--  The version string is recorded in the components table -->
 
<version>0.0.5</version>
 
<version>0.0.5</version>
 +
<!-- The description is optional and defaults to the name -->
 
<description>Description of the Hello World component ...</description>
 
<description>Description of the Hello World component ...</description>
  
 +
<update> <!-- Runs on update; New in 2.5 -->
 +
<schemas>
 +
<schemapath type="mysql">sql/updates/mysql</schemapath>
 +
</schemas>
 +
</update>
 +
 +
<!-- Site Main File Copy Section -->
 +
<!-- Note the folder attribute: This attribute describes the folder
 +
to copy FROM in the package to install therefore files copied
 +
in this section are copied from /site/ in the package -->
 
<files folder="site">
 
<files folder="site">
 
<filename>index.html</filename>
 
<filename>index.html</filename>
Line 112: Line 132:
  
 
<administration>
 
<administration>
 +
<!-- Administration Menu Section -->
 
<menu>Hello World!</menu>
 
<menu>Hello World!</menu>
 +
<!-- Administration Main File Copy Section -->
 +
<!-- Note the folder attribute: This attribute describes the folder
 +
to copy FROM in the package to install therefore files copied
 +
in this section are copied from /admin/ in the package -->
 
<files folder="admin">
 
<files folder="admin">
 +
<!-- Admin Main File Copy Section -->
 
<filename>index.html</filename>
 
<filename>index.html</filename>
 
<filename>helloworld.php</filename>
 
<filename>helloworld.php</filename>
</files>
+
<!-- SQL files section -->
 +
<folder>sql</folder>
 +
</files>
 
</administration>
 
</administration>
 +
 
</extension>
 
</extension>
 
</source>
 
</source>
Line 128: Line 157:
 
Content of your code directory
 
Content of your code directory
 
* ''[[#helloworld.xml|helloworld.xml]]''
 
* ''[[#helloworld.xml|helloworld.xml]]''
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!1.6_-_Part_01#index.html|site/index.html]]''
+
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_01#index.html|site/index.html]]''
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!1.6_-_Part_02#site/helloworld.php|site/helloworld.php]]''
+
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_02#site/helloworld.php|site/helloworld.php]]''
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!1.6_-_Part_02#site/controller.php|site/controller.php]]''
+
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_02#site/controller.php|site/controller.php]]''
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!1.6_-_Part_01#index.html|site/views/index.html]]''
+
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_01#index.html|site/views/index.html]]''
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!1.6_-_Part_01#index.html|site/views/helloworld/index.html]]''
+
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_01#index.html|site/views/helloworld/index.html]]''
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!1.6_-_Part_04#site/views/helloworld/view.html.php|site/views/helloworld/view.html.php]]''
+
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_04#site/views/helloworld/view.html.php|site/views/helloworld/view.html.php]]''
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!1.6_-_Part_01#index.html|site/views/helloworld/tmpl/index.html]]''
+
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_01#index.html|site/views/helloworld/tmpl/index.html]]''
 
* ''[[#site/views/helloworld/tmpl/default.xml|site/views/helloworld/tmpl/default.xml]]''
 
* ''[[#site/views/helloworld/tmpl/default.xml|site/views/helloworld/tmpl/default.xml]]''
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!1.6_-_Part_02#site/views/helloworld/tmpl/default.php|site/views/helloworld/tmpl/default.php]]''
+
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_02#site/views/helloworld/tmpl/default.php|site/views/helloworld/tmpl/default.php]]''
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!1.6_-_Part_01#index.html|site/models/index.html]]''
+
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_01#index.html|site/models/index.html]]''
 
* ''[[#site/models/helloworld.php|site/models/helloworld.php]]''
 
* ''[[#site/models/helloworld.php|site/models/helloworld.php]]''
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!1.6_-_Part_01#index.html|admin/index.html]]''
+
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_01#index.html|admin/index.html]]''
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!1.6_-_Part_01#admin/helloworld.php|admin/helloworld.php]]''
+
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_01#admin/helloworld.php|admin/helloworld.php]]''
 +
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_01#index.html|admin/sql/index.html]]''
 +
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_01#index.html|admin/sql/updates/index.html]]''
 +
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_01#index.html|admin/sql/updates/mysql/index.html]]''
 +
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_01#admin/sql/updates/mysql/0.0.1.sql|admin/sql/updates/mysql/0.0.1.sql]]''
 +
 
 +
Create a compressed file of this directory or directly download the [http://joomlacode.org/gf/download/frsrelease/11394/58229/com_helloworld-1.6-part05.zip archive] and install it using the extension manager of Joomla. You can add a menu item of this component using the menu manager in the backend.
  
Create a compressed file of this directory or directly download the [http://joomlacode.org/gf/download/frsrelease/11394/46143/com_helloworld-1.6-part05.zip 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 ==
 
== Navigate ==
  
[[Developing a Model-View-Controller (MVC) Component for Joomla!1.6 - Part 04|Prev: Adding a model to the site part]]
+
[[Developing a Model-View-Controller (MVC) Component for Joomla!2.5 - Part 04|Prev: Adding a model to the site part]]
[[Developing a Model-View-Controller (MVC) Component for Joomla!1.6 - Part 06|Next: Using the database]]
+
[[Developing a Model-View-Controller (MVC) Component for Joomla!2.5 - Part 06|Next: Using the database]]
  
 
== Contributors ==
 
== Contributors ==
 
*[[User:cdemko|Christophe Demko]]
 
*[[User:cdemko|Christophe Demko]]
 +
*[[User:oaksu|Ozgur Aksu]]
  
 
[[Category:Development]]
 
[[Category:Development]]
[[category:Joomla! 1.6]]
+
[[Category:Joomla! 1.6]]
[[category:Manual]]
+
[[Category:Joomla! 1.7]]
 +
[[Category:Joomla! 2.5]]

Latest revision as of 06:12, 29 May 2013


Introduction

This tutorial is part of the Developing a Model-View-Controller (MVC) Component for Joomla!2.5 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!2.5 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>

Two important things to note:

  • the request group of fields indicates mandatory fields
  • the name attribute can be passed to the component in the URL. In this case ?option=com_helloworld&id=1 would indicate that you had chosen option 1.

The model has to be modified in order to switch between the two different messages (which is chosen by the user with the field defined above):

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)) 
                {
                        //Uses JInput if magic quotes is turned off. Falls back to use JRequest.
                        if(!get_magic_quotes_gpc()) {
                                $id = JFactory::getApplication()->input->get('id', 1, 'INT' );
                        } else {
                                $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="2.5.0" method="upgrade">
 
        <name>Hello World!</name>
        <!-- The following elements are optional and free of formatting constraints -->
        <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>
        <!--  The version string is recorded in the components table -->
        <version>0.0.5</version>
        <!-- The description is optional and defaults to the name -->
        <description>Description of the Hello World component ...</description>
 
        <update> <!-- Runs on update; New in 2.5 -->
                <schemas>
                        <schemapath type="mysql">sql/updates/mysql</schemapath>
                </schemas>
        </update>
 
        <!-- Site Main File Copy Section -->
        <!-- Note the folder attribute: This attribute describes the folder
                to copy FROM in the package to install therefore files copied
                in this section are copied from /site/ in the package -->
        <files folder="site">
                <filename>index.html</filename>
                <filename>helloworld.php</filename>
                <filename>controller.php</filename>
                <folder>views</folder>
                <folder>models</folder>
        </files>
 
        <administration>
                <!-- Administration Menu Section -->
                <menu>Hello World!</menu>
                <!-- Administration Main File Copy Section -->
                <!-- Note the folder attribute: This attribute describes the folder
                        to copy FROM in the package to install therefore files copied
                        in this section are copied from /admin/ in the package -->
                <files folder="admin">
                        <!-- Admin Main File Copy Section -->
                        <filename>index.html</filename>
                        <filename>helloworld.php</filename>
                        <!-- SQL files section -->
                        <folder>sql</folder>
                </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. 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

Contributors