Joomla! Documentation - User contributions [en]

Archived talk:Developing a MVC Component/Using the database

2012-05-10T12:24:24Z

MisterEmme: /* Improper Implementation of the MVC Pattern */

This should really not be the default developing MVC component, the default should redirect to the documentation for whatever is current and this should be on a 1.6 specific page.

In what sense is it the default? [[User:Chris Davenport|Chris Davenport]] 20:03, 4 March 2010 (UTC)

I'm not sure is this good place to report issues with some sample code found in this tutorial, but it looks like JDatabaseQuery class has not actually being implemented in Joomla 1.6.0 Alpha2. This is causing problems with implementing Menu Item "Required Parameters". Comments in following code explain this a little bit better.

File: /administrator/components/com_testing/models/fields/testing.php (part of Joomla 1.6 test component)

26 $db =& JFactory::getDBO();
27 /* JDatabaseQuery class could not be found, so following 3 lines caused error
28 $query = new JDatabaseQuery;
29 $query->select('id,greeting');
30 $query->from('#__testing');
31 */
32 //manually creating query string instead
33 $query = 'SELECT id,greeting FROM #__testing';
34 $db->setQuery($query);

I recon this is something that would be fixed by actually implementing JDatabaseQuery class once Joomla 1.6 is in beta or latter stage, but for know it could be confusing to those of use following this tutorial. :)

[[User:irajkovic|Ivan Rajkovic]] 8 April 2010 (UTC)

== Not working as expected? ==

I may be doing something wrong, but I've copied all the code for the first 6 steps, and on this step I run into a problem. My menu item doesn't have the option to select the id under any of the settings. It does show the ID of the menu item itself, so perhaps there is a conflict based on the name??

== No New Field In Menu Item ==
I have the same problem. I have been trying to get the additional field in the menu item. It does not seem to work. I have tried it on Beta10, Beta5 and Beta1 - no luck. I have even tried the above manually built query (I don't think that is the problem) Any Suggestions?
[[User:Rpwolfgram|Rpwolfgram]] 02:45, 2 October 2010 (UTC)

== Improper Implementation of the MVC Pattern ==

As I was reading through this article on implementing an MVC component, I couldn't help but notice a complete violation of programming standards regarding encapsulation. Please see the chunk of code below that I pulled from the database usage page of this article.

<pre>
public function getMsg()
{
if (!isset($this->msg))
{
$id = JRequest::getInt('id', 1);
// Get a TableHelloWorld instance
$table = $this->getTable();

// Load the message
$table->load($id);

// Assign the message
$this->msg = $table->greeting;
}
return $this->msg;
}
</pre>

Take notice that the "id" value that is supplied via a request variable is retrieved from within the model method itself. This is completely improper as you now have a model which is no longer portable from one platform (i.e. Joomla) to another (i.e. Zend Framework). Models should always be encapsulated thus meaning any required parameters (such as "id") should be passed into the model method as a parameter. This example needs corrected and the entire article re-evaluated as a whole to ensure that you are not continuing the vicious cycle of bad programming.

Submitted By: Matt Scott (logicalchaosme@gmail.com)

Date: 2012-05-04

UPDATE - 2012-05-04: I have since updated both pages specifically related to the model example to reflect the proper methodologies of implementation.

[MisterEmme] I think the updated version is not working properly: maybe that's bacause $id parameter is not provided to the model

Archived:Developing a MVC Component/Using the database

2012-05-10T11:04:52Z

MisterEmme: Undo revision 67200 by MisterEmme (talk)

This tutorial is for {{JVer|1.6}} {{JVer|1.7}} {{JVer|2.5}}

== Articles in this series ==
{{Chunk:Developing a Model-View-Controller (MVC) Component for Joomla!2.5 - Contents}}

== 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.

== Using the database ==
Components usually manage their contents using the database. During the install/uninstall/update phase of a component, you can execute SQL queries through the use of SQL text files.

With your favorite file manager and editor create two files called ''admin/sql/install.mysql.utf8.sql'' and ''admin/sql/updates/mysql/0.0.6.sql''. They should both have the same content, as follows:


''admin/sql/install.mysql.utf8.sql'' and ''admin/sql/updates/mysql/0.0.6.sql''
<source lang="sql">
DROP TABLE IF EXISTS `#__helloworld`;

CREATE TABLE `#__helloworld` (
`id` int(11) NOT NULL auto_increment,
`greeting` varchar(25) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=0 DEFAULT CHARSET=utf8;

INSERT INTO `#__helloworld` (`greeting`) VALUES
('Hello World!'),
('Good bye World!');
</source>


The file ''install.mysql.utf8.sql'' will be executed when you install this component. The file ''0.0.6.sql'' is executed when you do an update.

'''Important Note:''' When the component is installed, the files in the SQL updates folder (for example, ''admin/sql/updates/mysql'') are read and the name of the last file alphabetically is used to populate the component's version number in the <code>#__schemas</code> table. This value must be in this table in order for the automatic update to execute the update SQL files for future versions. For this reason, it is good practice to create a SQL update file for each version (even if it is empty or just has a comment). This way the <code>#__schemas</code> version will always match the component version.

This is the install file. It will be executed if you put an appropriate order in the ''helloworld.xml'' file


''helloworld.xml''
<source lang="xml">
<?xml version="1.0" encoding="utf-8"?>
<extension type="component" version="2.5.0" 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>0.0.6</version>

<description>Description of the Hello World component ...</description>

<install> 
<sql>
<file driver="mysql" charset="utf8">sql/install.mysql.utf8.sql</file>
</sql>
</install>
<uninstall> 
<sql>
<file driver="mysql" charset="utf8">sql/uninstall.mysql.utf8.sql</file>
</sql>
</uninstall>
<update> 
<schemas>
<schemapath type="mysql">sql/updates/mysql</schemapath>
</schemas>
</update>



<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>

<folder>sql</folder>

<folder>tables</folder>

<folder>models</folder>
</files>
</administration>

</extension>
</source>


Do the same for the uninstall file:

With your favorite file manager and editor put a file ''admin/sql/uninstall.mysql.utf8.sql'' containing:


''admin/sql/uninstall.mysql.utf8.sql''
<source lang="sql">
DROP TABLE IF EXISTS `#__helloworld`;
</source>


== Adding a new field type ==
For the moment, we have used a [[Developing_a_Model-View-Controller_%28MVC%29_Component_for_Joomla!2.5_-_Part_03|hard coded field type for messages]]. We need to use our database for choosing the message.

Modify the ''site/views/helloworld/tmpl/default.xml'' file and put these lines


''site/views/helloworld/tmpl/default.xml''
<source lang="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"
addfieldpath="/administrator/components/com_helloworld/models/fields"
>
<fieldset name="request">
<field
name="id"
type="helloworld"
label="COM_HELLOWORLD_HELLOWORLD_FIELD_GREETING_LABEL"
description="COM_HELLOWORLD_HELLOWORLD_FIELD_GREETING_DESC"
/>
</fieldset>
</fields>
</metadata>
</source>


It introduces a new field type and tells Joomla to look for the field definition in the ''/administrator/components/com_helloworld/models/fields'' folder.

With your favorite file manager and editor put a file ''admin/models/fields/helloworld.php'' file containing:


''admin/models/fields/helloworld.php''
<source lang="php">
<?php
// No direct access to this file
defined('_JEXEC') or die;

// import the list field type
jimport('joomla.form.helper');
JFormHelper::loadFieldClass('list');

/**
* HelloWorld Form Field class for the HelloWorld component
*/
class JFormFieldHelloWorld extends JFormFieldList
{
/**
* The field type.
*
* @var string
*/
protected $type = 'HelloWorld';

/**
* Method to get a list of options for a list input.
*
* @return array An array of JHtml options.
*/
protected function getOptions()
{
$db = JFactory::getDBO();
$query = $db->getQuery(true);
$query->select('id,greeting');
$query->from('#__helloworld');
$db->setQuery((string)$query);
$messages = $db->loadObjectList();
$options = array();
if ($messages)
{
foreach($messages as $message)
{
$options[] = JHtml::_('select.option', $message->id, $message->greeting);
}
}
$options = array_merge(parent::getOptions(), $options);
return $options;
}
}
</source>


The new field type displays a drop-down list of messages to choose from. You can see the result of this change in the menu manager section for the helloworld item.

== Display the chosen message ==
When a menu item of this component is created/updated, Joomla stores the identifier of the message. The ''HelloWorldModelHelloWorld'' model has now to compute the message according to this identifier and the data stored in the database.

Modify the ''site/models/helloworld.php'' file:


''site/models/helloworld.php''
<source lang="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 array messages
*/
protected $messages;

/**
* Returns a reference to the a Table object, always creating it.
*
* @param type The table type to instantiate
* @param string A prefix for the table class name. Optional.
* @param array Configuration array for model. Optional.
* @return JTable A database object
* @since 2.5
*/
public function getTable($type = 'HelloWorld', $prefix = 'HelloWorldTable', $config = array())
{
return JTable::getInstance($type, $prefix, $config);
}
/**
* Get the message
* @param int The corresponding id of the message to be retrieved
* @return string The message to be displayed to the user
*/
public function getMsg($id = 1)
{
if (!is_array($this->messages))
{
$this->messages = array();
}

if (!isset($this->messages[$id]))
{
// Get a TableHelloWorld instance
$table = $this->getTable();

// Load the message
$table->load($id);

// Assign the message
$this->messages[$id] = $table->greeting;
}

return $this->messages[$id];
}
}
</source>


The model now asks the ''TableHelloWorld'' to get the message. This table class has to be defined in ''admin/tables/helloworld.php'' file


''admin/tables/helloworld.php''
<source lang="php">
<?php
// No direct access
defined('_JEXEC') or die('Restricted access');

// import Joomla table library
jimport('joomla.database.table');

/**
* Hello Table class
*/
class HelloWorldTableHelloWorld extends JTable
{
/**
* Constructor
*
* @param object Database connector object
*/
function __construct(&$db)
{
parent::__construct('#__helloworld', 'id', $db);
}
}
</source>


You shouldn't see any differences, but if you access the database you should see a table named ''jos_helloworld'' with two columns: id and greeting. And two entries: ''Hello World!'' and ''Good bye World''

== Packaging the component ==

Content of your code directory
* ''[[#helloworld.xml|helloworld.xml]]''
* ''[[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!2.5_-_Part_02#site/helloworld.php|site/helloworld.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!2.5_-_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/helloworld/index.html]]''
* ''[[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!2.5_-_Part_01#index.html|site/views/helloworld/tmpl/index.html]]''
* ''[[#site/views/helloworld/tmpl/default.xml|site/views/helloworld/tmpl/default.xml]]''
* ''[[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!2.5_-_Part_01#index.html|site/models/index.html]]''
* ''[[#site/models/helloworld.php|site/models/helloworld.php]]''
* ''[[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!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]]''
* ''[[#admin/sql/install.mysql.utf8.sql|admin/sql/install.mysql.utf8.sql]]''
* ''[[#admin/sql/uninstall.mysql.utf8.sql|admin/sql/uninstall.mysql.utf8.sql]]''
* ''[[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]]''
* ''[[#admin/sql/install.mysql.utf8.sql|admin/sql/updates/mysql/0.0.6.sql]]''
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_01#index.html|admin/models/index.html]]''
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_01#index.html|admin/models/fields/index.html]]''
* ''[[#admin/models/fields/helloworld.php|admin/models/fields/helloworld.php]]''
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_01#index.html|admin/tables/index.html]]''
* ''[[#admin/tables/helloworld.php|admin/tables/helloworld.php]]''

Create a compressed file of this directory or directly download the [http://joomlacode.org/gf/download/frsrelease/11394/58405/com_helloworld-1.6-part06.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.

== Zips ==
Download the zip file for this Part:
[http://www.leyar.com/joomlaorg/part06.zip]

== Navigate ==

[[Developing a Model-View-Controller (MVC) Component for Joomla!2.5 - Part 05|Prev: Adding a variable request in the menu type]]
[[Developing a Model-View-Controller (MVC) Component for Joomla!2.5 - Part 07|Next: Basic backend]]

== Contributors ==
*[[User:cdemko|Christophe Demko]]
*[[User:oaksu|Ozgur Aksu]]

[[Category:Development]]
[[category:Joomla! 1.6]]
[[category:Joomla! 1.7]]
[[category:Joomla! 2.5]]
[[category:Manual]]

''Italic text''

Archived:Developing a MVC Component/Using the database

2012-05-10T11:01:48Z

MisterEmme: /* Display the chosen message */

This tutorial is for {{JVer|1.6}} {{JVer|1.7}} {{JVer|2.5}}

== Articles in this series ==
{{Chunk:Developing a Model-View-Controller (MVC) Component for Joomla!2.5 - Contents}}

== 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.

== Using the database ==
Components usually manage their contents using the database. During the install/uninstall/update phase of a component, you can execute SQL queries through the use of SQL text files.

With your favorite file manager and editor create two files called ''admin/sql/install.mysql.utf8.sql'' and ''admin/sql/updates/mysql/0.0.6.sql''. They should both have the same content, as follows:


''admin/sql/install.mysql.utf8.sql'' and ''admin/sql/updates/mysql/0.0.6.sql''
<source lang="sql">
DROP TABLE IF EXISTS `#__helloworld`;

CREATE TABLE `#__helloworld` (
`id` int(11) NOT NULL auto_increment,
`greeting` varchar(25) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=0 DEFAULT CHARSET=utf8;

INSERT INTO `#__helloworld` (`greeting`) VALUES
('Hello World!'),
('Good bye World!');
</source>


The file ''install.mysql.utf8.sql'' will be executed when you install this component. The file ''0.0.6.sql'' is executed when you do an update.

'''Important Note:''' When the component is installed, the files in the SQL updates folder (for example, ''admin/sql/updates/mysql'') are read and the name of the last file alphabetically is used to populate the component's version number in the <code>#__schemas</code> table. This value must be in this table in order for the automatic update to execute the update SQL files for future versions. For this reason, it is good practice to create a SQL update file for each version (even if it is empty or just has a comment). This way the <code>#__schemas</code> version will always match the component version.

This is the install file. It will be executed if you put an appropriate order in the ''helloworld.xml'' file


''helloworld.xml''
<source lang="xml">
<?xml version="1.0" encoding="utf-8"?>
<extension type="component" version="2.5.0" 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>0.0.6</version>

<description>Description of the Hello World component ...</description>

<install> 
<sql>
<file driver="mysql" charset="utf8">sql/install.mysql.utf8.sql</file>
</sql>
</install>
<uninstall> 
<sql>
<file driver="mysql" charset="utf8">sql/uninstall.mysql.utf8.sql</file>
</sql>
</uninstall>
<update> 
<schemas>
<schemapath type="mysql">sql/updates/mysql</schemapath>
</schemas>
</update>



<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>

<folder>sql</folder>

<folder>tables</folder>

<folder>models</folder>
</files>
</administration>

</extension>
</source>


Do the same for the uninstall file:

With your favorite file manager and editor put a file ''admin/sql/uninstall.mysql.utf8.sql'' containing:


''admin/sql/uninstall.mysql.utf8.sql''
<source lang="sql">
DROP TABLE IF EXISTS `#__helloworld`;
</source>


== Adding a new field type ==
For the moment, we have used a [[Developing_a_Model-View-Controller_%28MVC%29_Component_for_Joomla!2.5_-_Part_03|hard coded field type for messages]]. We need to use our database for choosing the message.

Modify the ''site/views/helloworld/tmpl/default.xml'' file and put these lines


''site/views/helloworld/tmpl/default.xml''
<source lang="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"
addfieldpath="/administrator/components/com_helloworld/models/fields"
>
<fieldset name="request">
<field
name="id"
type="helloworld"
label="COM_HELLOWORLD_HELLOWORLD_FIELD_GREETING_LABEL"
description="COM_HELLOWORLD_HELLOWORLD_FIELD_GREETING_DESC"
/>
</fieldset>
</fields>
</metadata>
</source>


It introduces a new field type and tells Joomla to look for the field definition in the ''/administrator/components/com_helloworld/models/fields'' folder.

With your favorite file manager and editor put a file ''admin/models/fields/helloworld.php'' file containing:


''admin/models/fields/helloworld.php''
<source lang="php">
<?php
// No direct access to this file
defined('_JEXEC') or die;

// import the list field type
jimport('joomla.form.helper');
JFormHelper::loadFieldClass('list');

/**
* HelloWorld Form Field class for the HelloWorld component
*/
class JFormFieldHelloWorld extends JFormFieldList
{
/**
* The field type.
*
* @var string
*/
protected $type = 'HelloWorld';

/**
* Method to get a list of options for a list input.
*
* @return array An array of JHtml options.
*/
protected function getOptions()
{
$db = JFactory::getDBO();
$query = $db->getQuery(true);
$query->select('id,greeting');
$query->from('#__helloworld');
$db->setQuery((string)$query);
$messages = $db->loadObjectList();
$options = array();
if ($messages)
{
foreach($messages as $message)
{
$options[] = JHtml::_('select.option', $message->id, $message->greeting);
}
}
$options = array_merge(parent::getOptions(), $options);
return $options;
}
}
</source>


The new field type displays a drop-down list of messages to choose from. You can see the result of this change in the menu manager section for the helloworld item.

== Display the chosen message ==
When a menu item of this component is created/updated, Joomla stores the identifier of the message. The ''HelloWorldModelHelloWorld'' model has now to compute the message according to this identifier and the data stored in the database.

Modify the ''site/models/helloworld.php'' file:


''site/models/helloworld.php''
<source lang="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;

/**
* Returns a reference to the a Table object, always creating it.
*
* @param type The table type to instantiate
* @param string A prefix for the table class name. Optional.
* @param array Configuration array for model. Optional.
* @return JTable A database object
* @since 1.6
*/
public function getTable($type = 'HelloWorld', $prefix = 'HelloWorldTable', $config = array())
{
return JTable::getInstance($type, $prefix, $config);
}
/**
* Get the message
* @return string The message to be displayed to the user
*/
public function getMsg()
{
if (!isset($this->msg))
{
$id = JRequest::getInt('id');
// Get a TableHelloWorld instance
$table = $this->getTable();

// Load the message
$table->load($id);

// Assign the message
$this->msg = $table->greeting;
}
return $this->msg;
}
}
</source>


You shouldn't see any differences, but if you access the database you should see a table named ''jos_helloworld'' with two columns: id and greeting. And two entries: ''Hello World!'' and ''Good bye World''

== Packaging the component ==

Content of your code directory
* ''[[#helloworld.xml|helloworld.xml]]''
* ''[[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!2.5_-_Part_02#site/helloworld.php|site/helloworld.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!2.5_-_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/helloworld/index.html]]''
* ''[[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!2.5_-_Part_01#index.html|site/views/helloworld/tmpl/index.html]]''
* ''[[#site/views/helloworld/tmpl/default.xml|site/views/helloworld/tmpl/default.xml]]''
* ''[[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!2.5_-_Part_01#index.html|site/models/index.html]]''
* ''[[#site/models/helloworld.php|site/models/helloworld.php]]''
* ''[[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!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]]''
* ''[[#admin/sql/install.mysql.utf8.sql|admin/sql/install.mysql.utf8.sql]]''
* ''[[#admin/sql/uninstall.mysql.utf8.sql|admin/sql/uninstall.mysql.utf8.sql]]''
* ''[[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]]''
* ''[[#admin/sql/install.mysql.utf8.sql|admin/sql/updates/mysql/0.0.6.sql]]''
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_01#index.html|admin/models/index.html]]''
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_01#index.html|admin/models/fields/index.html]]''
* ''[[#admin/models/fields/helloworld.php|admin/models/fields/helloworld.php]]''
* ''[[Developing_a_Model-View-Controller_(MVC)_Component_for_Joomla!2.5_-_Part_01#index.html|admin/tables/index.html]]''
* ''[[#admin/tables/helloworld.php|admin/tables/helloworld.php]]''

Create a compressed file of this directory or directly download the [http://joomlacode.org/gf/download/frsrelease/11394/58405/com_helloworld-1.6-part06.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.

== Zips ==
Download the zip file for this Part:
[http://www.leyar.com/joomlaorg/part06.zip]

== Navigate ==

[[Developing a Model-View-Controller (MVC) Component for Joomla!2.5 - Part 05|Prev: Adding a variable request in the menu type]]
[[Developing a Model-View-Controller (MVC) Component for Joomla!2.5 - Part 07|Next: Basic backend]]

== Contributors ==
*[[User:cdemko|Christophe Demko]]
*[[User:oaksu|Ozgur Aksu]]

[[Category:Development]]
[[category:Joomla! 1.6]]
[[category:Joomla! 1.7]]
[[category:Joomla! 2.5]]
[[category:Manual]]

''Italic text''

Archived talk:Developing a MVC Component/Adding a variable request in the menu type

2012-05-08T06:35:01Z

MisterEmme:

[10-09-2010 pwiseman] Testing failed. I needed to swap the order of the <fieldset> and <fields> tags to get it to work, and add a "name" attribute to fields. Possibly the "group" and "array" attributes are no longer required in 1.6?

[05-05-2012 MisterEmme] Please note that the model in the zip file is different from the one shown on the page. The one in the zip file is working.