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Oleksandr Masovets. Forms in Drupal. Drupal Camp Kyiv 2011
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Oleksandr Masovets. Forms in Drupal. Drupal Camp Kyiv 2011

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Доклад познакомит начинающих друпалеров с идеологией, архитектурой и основами работы с формами в Drupal. …

Доклад познакомит начинающих друпалеров с идеологией, архитектурой и основами работы с формами в Drupal.
<ul>
<li> элементы форм</li>
<li> валидация форм</li>
<li> действия (CallBack) форм</li>
<li> ahah действия (CallBack) форм</li>
<li> рендер форм</li>
<li> различия между Form API в Drupal 6 и 7</li>
<li> использование форм в собственных модулях</li>
<li> tips and tricks</li>
</ul>

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  • 1. Forms in Drupal Oleksandr Masovets E-mail: krasnyj@neformat.com.ua Skype: krasnyjdirex
  • 2. Gold Sponsor ofDrupalCamp Kyiv 2011
  • 3. Silver Sponsors ofDrupalCamp Kyiv 2011
  • 4. Working with forms• Form – Render – System form• Form alter• Form validation• Form submit• Destination (redirect)
  • 5. FormForm call function: drupal_get_form($form_id);•$form_id - the unique string identifying the desired form. If afunction with that name exists, it is called to build the form array.drupal_get_form() does the following:•Starts the entire form-building process by getting the $form fromthe builder function.•Translates the $form[name] items into actual form elements.•Performs any validation and "clean-up" that needs to be done, andcalls custom validation functions if declared.•Submits the form if a submit function is declared, and the form hasbeen submitted.•Calls any custom theming functions that have been declared.•Returns an HTML string which contains the actual form.
  • 6. Form elements
  • 7. Form element structureRequired parameters:$form[‘element name’] = array ( ‘#type’ = ‘element type’,);Every element automatically has these default values:•#description = NULL•#attributes = array()•#required = FALSE•#tree = FALSE•#parents = array()
  • 8. AhahAjax callback for an element• Using ‘#ahah’(D6) or ‘#ajax’(D7) attributes to builds a form element with a set of #ahah#ajax properties.• Using ‘#ajax[‘callback’]’(D7) or ‘#ahah[‘path’]’(D6)#ajax[‘path’]’(D7) to locate ajax function.• Using additional ahahajax options to change behavior of the form element.
  • 9. Theming forms• Adding #theme attributes to the form and/or elements.• Including any markup directly as an element in the $form array.• Break out any markup into a separate theme function.
  • 10. Form alterPerform alterations before a form is rendered:hook_form_alter(&$form, &$form_state, $form_id); ORhook_form_FORM_ID_alter(&$form, &$form_state);
  • 11. Form validation• Adding ‘#validate’ attribute (an array with list of custom validation functions) to the form.• Adding  ‘#element_validate’ attributes (an array with list of custom validation functions) to the form elements.• Using myform_validation($form, &$form_state) function.• The validation functions must use form_error() or form_set_error() functions to flag the element as having an error if the validation fails.
  • 12. Form submit and redirect• Adding ‘#submit’ attribute (an array with list of custom submit functions) to the form.• Using myform_submit($form, &$form_state) function.• To determine where the user should be sent after the form is processed, the _submit function can place a path or URL in $form_state[redirect] which will be the target of a drupal_goto.• Every form is redirected after a submit. If nothing stored in $form_state[redirect], the form will simply be redirected to itself after a submit.
  • 13. Links• http://api.drupal.org• http://api.drupal.org/api/drupal/develope r--topics--forms_api_reference.html/• http://drupal.org/node/751826
  • 14. Forms in Drupal Oleksandr Masovets E-mail: krasnyj@neformat.com.ua Skype: krasnyjdirex