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Joomla hello world MVC component Tutorial
| Joomla hello world MVC component Tutorial |
| Friday, 16 March 2007 | |
What Is MVCRevised for Joomla 1.5 beta 2
Model-view-controller (MVC) is an architectural pattern used in software engineering. In complex computer applications that present lots of data to the user, one often wishes to separate data (model) and user interface (view) concerns, so that changes to the user interface do not impact the data handling, and that the data can be reorganized without changing the user interface. The model-view-controller solves this problem by decoupling data access and business logic from data presentation and user interaction, by introducing an intermediate component: the controller. It is common to split an application into separate layers: presentation (UI), domain, and data access. In MVC the presentation layer is further separated into view and controller. MVC encompasses more of the architecture of an application than is typical for a design pattern. Model The domain-specific representation of the information on which the application operates. In Joomla it is MySQL database tables. Joomla model classes basically contains table schemes. Formerly known as mosTable. View Renders the model into a form suitable for interaction, typically a user interface element. In Joomla it is set of View class and 1 or more templates. Controller Processes and responds to events, typically user actions, and may invoke changes on the model. In Joomla process tasks. to trigger tasks, Every thing you need is to create methods in controller class with the same name as a task. Joomla MVC Works as follows
Where is the Model? Model is used inside controllers' task functions. If it is for example Publish task, function publish will launch appropriate model to change published field. File structure explanation
Controller folder contains controller classes. Foe example for Book Library, Book Category controller, Book controller, Book Publisher controller and so on. Models contain Model classes. One Model class is equal to one DB table. View folder contains view classes and templates. Every view class may have few templates that are stored in tmpl folder. Every view class has the same name view.html.php. And tmpl folder contains html template files. Admin.component.php is a component launch file and controller.php is default controller. Let's create most simple MVC Component. We will create component called mvc.The component we will create can be downloaded here.
Comments (19)
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written by Sergey, June 17, 2007
Comments did not work for long time and I thought that no one is interested in it that is way I did not write tutorial on how to create models and so on.
Keep the tutorials coming
written by Tom Fuller, June 29, 2007
Sergey:
we who are new to programming for Joomla 1.5 need great tutorials like yours. I am trying to create a Message Management System for my church. I have Hagen Graf's book Joomla 1.5 Beta - and ran into a fatal error using a call to JcommonHTML. I noticed a thread in a discussion of your mvc component about it, but can't find out if something has changed. I already changed JMenuBar to JToolBarHelper in the code of mvc that made it work. Was there a change to the way the JCommonHTML worked or a change to the name that you know of? Thanks! tom Great Help!
written by Duke, July 06, 2007
Hi!
I just want to thank you for this nice tutorial! It helped me alot understanding the joomla-api and how to get started! Keep on writing more tutorials like this! Greetings, Duke Keep getting logged out
written by Charlotte, July 10, 2007
I tried to go through this guide, but after step 7 when I try to call my component I keep getting logged out. I haven't changed anything in the code and the folder structure is the same as the example.
Thank you!
written by sashakk, July 24, 2007
Thx so much for your tutorial. Im waiting for your new ones.
Great Tutorial
written by Jean Rumeau, October 29, 2007
I've been using joomla for a long time but I'm new to the components development so im trying this tutorial, everything's going well, but now i want to know is where are the JToolbarHelper methods because i cant find them in the API documentation.
Greetings Vacation seeker.
written by nick88, November 30, 2007
I'm looking for an erotic adult vacation in the Caribbean island of Dominican Republic, some place where the beach villas are nice and the girls are nicer.
your dailymessage component of joomla 1.5 is not work in proper way
written by krishna kumar, December 03, 2007
respected sir/madam, your i have to installed dailymessage component of joomla 1.5 ,bit there are problem , when we add a main menu as daily message and we want to display in front end ,and click on (main menu)dailymessage then there display a error message.
error as Warning: Missing argument 1 for JMenu::getInstance(), called in D:phpxampphtdocsjoomla_newcomponentscom_dailymessagedai lymessage.php on line 23 and defined in D:phpxampphtdocsjoomla_newlibrariesjoomlaapplicationmen u.php on line 84 Fatal error: Call to undefined method JException::getActive() in D:phpxampphtdocsjoomla_newcomponentscom_dailymessagedai lymessage.php on line 30 Many thanks
written by ze0, December 04, 2007
The bet tutorial i??ve ever found. I??ll bookmark this place! Thx again!
Multiple table models
written by irfan ahmed, March 18, 2008
Your tutorial is bull's eye, and clear. if examples of models involving more than 1 with joins and views . how to manage update delete for master table and foreign keys, will be a welcome one.
thanks for an excellent tutorial on MVC in joomla. has anyone got a way to do a module in MVC ?
written by clive, April 03, 2008
has anyone got a way to do a module in MVC ?
IF any one found some tuts on this site or else where , do give me a shout This e-mail address is being protected from spam bots, you need JavaScript enabled to view it Thanx you for this Tutorial
written by DonPedro, April 23, 2008
You tutorial helps us to develop some simple extentions for our cliens.
Joomla is mus more different compare to Typo3 Per another one
written by Johny2, April 30, 2008 Thanx for this tutorial written by amit kamble, May 09, 2008
Thank you very much for such a great tutorial
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| Last Updated ( Wednesday, 18 July 2007 ) |
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