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Controllers: Programming Application Logic in Java Print Code-128 in Java Controllers: Programming Application Logic




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Controllers: Programming Application Logic use jboss barcode 128 maker toinsert code128 for java .NET Framework 3.0 In CakePHP, we can ass Code 128 Code Set C for Java ociate models with controllers in 2 ways: 1. Automatic binding: CakePHP automatically binds a model with a controller through its naming convention. Like a controller named BooksController will be tied with a model named Book automatically (unless something else is manually defined).

2. Manual binding: If we want to override the automatic binding, we can assign $uses controller attribute to an array of models. Those models will be available to the controller.

. "Convention over confi guration" is one of the principal philosophies of CakePHP framework. It is recommended to follow the naming conventions of controllers and models and let Cake attach related controllers and models automatically. It would simplify things.

. We have already seen h barcode standards 128 for Java ow the second method (Manual binding) works. We assigned an empty array to $uses attribute of BooksController to tell Cake that this controller has no dependency on any model class. We could also manually attach more than one model(s) to a controller using the $uses attribute.

In that case, we just have to put all the model names in the $uses attribute, like this:. $uses = array ( "Model Name1", "ModelName2" ) ;. We just learnt how con Code128 for Java trollers can be tied up with models. Now, we will see how they can interact with the presentation files, a.k.

a views.. Action, Parameters, and Views In CakePHP, actions ar Code 128 Code Set C for Java e public methods of controllers that represent URLs. A general Cake URL contains suffixes like /controller_name/action_name and from this pattern Cake automatically maps the URL with a controller"s action. Again, every such controller action can automatically call a view file that contains the display logic for that particular action.

The appropriate view file is determined from the controller and action names. As an example, if the index() action of the BooksController is requested, the view file in /app/views/books/index.ctp will be rendered.

We very often need to supply processed data to those view files from controllers, so that we can present the data in a suitable format to the user.. [ 52 ]. 4 . Interacting with View CakePHP determines the awt barcode code 128 appropriate view file for a controller"s action by its naming convention. Controller can also supply processed data to those view files. To do that we can use the controller method set().

In chapter 3, we saw some uses of this set() method. In this section, we will learn some more on how we can interact with view files from controllers..

Time for Action: Passing Variables to a View < php class BooksCo jar code 128 barcode ntroller extends AppController { var $name = "Books"; var $uses = array();. 1. Change the index() action of the BooksController (/app/controllers/ books_controller.php).

. function index() { $th Java Code 128A is->set("page_heading", "Packt Book Store"); => "Object Oriented Programming with PHP5", "author" => "Hasin Hayder", "isbn" => "1847192564", "release_date" => "December 2007" ); $this->set($book); $this->pageTitle = "Welcome to the Packt Book Store!"; } } > $book = array ( "book_title". 2. Change view file in dex.ctp (/app/views/books/index.

ctp) with the following code:. <h2>< php ech code-128c for Java o $page_heading; ></h2> <dl> <lh>< php echo $bookTitle; ></lh> <dt>Author:</dt><dd>< php echo $author; ></dd> <dt>ISBN:</dt><dd>< php echo $isbn; ></dd> <dt>Release Date:</dt><dd>< php echo $releaseDate; ></dd> </dl>. 3. Now enter the following URL in your browser. http://localhost/applo Code128 for Java gic/books/.. [ 53 ]. Controllers: Programming Application Logic What Just Happened In the index() action, we first used the set() method to set a view variable named page_heading. $this->set("page_he ading", "Packt Book Store");. The first parameter of swing ANSI/AIM Code 128 set()specifies the view variable"s name and the second parameter defines its value. In the view file, in the first line, we simply printed out the $page_heading variable that displays the text Packt Book Store (that was set in the controller). In the index() action, we then created an associative array named $book.

. $book PHP5", "author" => "Hasin Hayder", "isbn" => "1847192564", "release_date" => "December 2007" ); = array ( "book_title" => "Object Oriented Programming with. And then passed this a jsp Code128 rray to the view files using the set() method like this:. $this->set($book);. As we can see, the set Code 128B for Java () method can take a single parameter as well. We can create an associative array (as we created the $book array) and pass that array to the set() method. It will automatically set all these key=>value pairs of the associative array respectively, as view variables and their values.

This method can be pretty handy if we want to assign a set of variables to the view quickly. One thing to be noted, in this case, all the underscored array keys will become CamelCased view variables. Like, in our case, the book_title and release_date keys set in the controller became $bookTitle and $releaseDate variables in the correspondent view.

Inside the view file, we then printed out all those variables set through the associative array $book. Lastly, in the controller action, we defined a controller attribute named $pageTitle..

$this->pageTitle = "Welcome to the Packt Book Store!";. [ 54 ].
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