Drupal 4,7 and the new one Forms API

last May 1 was published officially the final version of Drupal 4,7, one of the license content agents free more popular, writing in PHP. As it can be seen in the news published in the page of the project, has passed slightly more than a year since began the development of this branch. 1500 patches originating from 338 different contributors have been counted, with which it is estimated that the community of desarrolladores has multiplied for 6 with regard to the previous version. The list of changes is available in the page of the news, but wanted to take advantage of to speak of one of the most significant characteristics of that new version: The new one API for forms.

In Drupal 4,7, the alteration, extension or personalization of aspect of any form is almost immediate and quite simple. Instead of composing a form creating directly the HTML code for the same one, using the functions of aid for the generation of the labels, an associative array is used where we go adding each one of the elements of our form with its corresponding properties. The reference of elements, properties, and values by defect for the properties of you determined elements, can be found in drupaldocs.org. But we see an example of generation of a form. We imagine that we want to create a form that collect information in two fields: Title (obligatory) and photography (optional). The corresponding code would be the following one:

$Form [' title'] = array (‘#type' => 'textfield', ‘#title' => t (' Title'), ‘#required' => true, ‘#default_value' => $node->title); $form [' _node_files'] [' photo'] = array (‘#type' => 'file', ‘#title' => t (' Photo'), ‘#required' => false, ‘#default_value' => $node->node_files [' photo']); Subsequently, of course, we would use the. There is a module already prepared for this, call node_files. modulate, in the repository CVS of contributions. But as it can be seen, to generate each one of the fields of our form is very simple.

But we go beyond. Also we can personalize existing forms. For example, we imagine that we want to simplify the data insertion form of a determined type of node, so that they appear not you determined preestablished fields by Drupal as the date of creation, the author, or the button of previsualización. Therefore we can utilize hook_form_alter () to capture the variable that contains our form before be converted to HTML and shown in the page, and to alter variable happiness in that that us plazca. Continuing the example proposed, for a form called product_node_form, we would be able to generate the following code:

If ($form_id == ‘product_node_form') {// Hidden the fieldset complete where they appear author and date $form [' author'] [' #type'] = 'hidden'; // Hidden the button of previsualización $form [' preview'] [' #type'] = 'hidden';} Also we can do that a block of fields appear always unfolded, instead of showing the title

The block with the hidden fields:

// The block of categories will not be folding $form [' taxonomy'] [' #collapsible'] = 0; OR even we can remove some fields of its block, to place them to the same level that our fields Title

Photography:

// We Create a state field from the original one $form [' status'] = $form [' options'] [' status']; // and we destroy the original one unset ($form[’ options'] [' status']); // we Create a field promoted from the original one $form [' promote'] = $form [' options'] [' promote']; // and we destroy the original one unset ($form[’ options'] [' promote']); In final, a new one Necessary in each case.

If you desire to expand this information, not to stop visiting the fast guide of Forms API in drupaldocs.org.

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