php Drupal中的条件表单字段

Posted 2021-05-04

[function `hook_form_alter` (aka, the function in which you mess with states)](https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Form%21form.api.php/function/hook_form_alter/8.6.x)    
[Build a Module: Adding usability with the #states attribute](https://buildamodule.com/video/drupal-7-development-core-concepts-how-to-build-and-manipulate-forms-with-the-form-api-modifying-forms-with-hook-form-alter#viewing)   
[Form API Reference - #states](https://api.drupal.org/api/drupal/developer!topics!forms_api_reference.html/7.x#states)    
[function `drupal_process_states` (Includes a list of all possible states!)](https://api.drupal.org/api/drupal/includes%21common.inc/function/drupal_process_states/7.x)    
[Lullabot: Form API #states](https://www.lullabot.com/articles/form-api-states)   
[Drupal 7 Form API: Using #states with multiple conditionals (AND, OR and XOR)](https://www.metaltoad.com/blog/drupal-7-form-api-using-states-multiple-conditionals-and-or-and-xor)    
[Conditional Fields in Paragraphs Using the Javascript States API for Drupal 8](https://agaric.coop/blog/conditional-fields-paragraphs-using-javascript-states-api-drupal-8)    

Note that the states condition uses a jQuery selector

// This is stuff from essential access. 
// Note that it's altering the pre-existing user registration form which was mostly created in the GUI.
// However, some stuff (such as conditional states and instructional text) can't be done in the GUI.

/**
 * Set up conditional PDPT fields on the user_register_form.
 */
function essentialaccess_form_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id) {

  if($form_id == 'user_register_form') {

    $form['field_eligibility_requirements']['#states'] = [
      'visible' => [
        ':input[name="field_registering_for[pdpt]"]' => ['checked' => TRUE],
      ],
      'enabled' => [
        ':input[name="field_registering_for[pdpt]"]' => ['checked' => TRUE],
      ],
      'invisible' => [
        ':input[name="field_registering_for[pdpt]"]' => ['checked' => FALSE],
      ],
      'disabled' => [
        ':input[name="field_registering_for[pdpt]"]' => ['checked' => FALSE],
      ],
    ];

    $form['field_eligibility_requirements']['widget'] += [
      '#field_prefix' => t("All participating clinic sites and LHJs must:"),
    ];

    $form['field_eligibility_requirements'] += [
      'explanation' => [
        '#type' => "item",
        '#markup' => "<div id='eligibility-requirements-not-met'>" . t("Please note that if your site does not meet these eligibility requirements then you cannot register it.") . "</div>",
        '#states' => [
          'invisible' => [
            ':input[name="field_eligibility_requirements[california]"]' => ['checked' => TRUE],
            ':input[name="field_eligibility_requirements[at_risk]"]' => ['checked' => TRUE],
            ':input[name="field_eligibility_requirements[340b]"]' => ['checked' => TRUE],
            ':input[name="field_eligibility_requirements[uninsured]"]' => ['checked' => TRUE],
            ':input[name="field_eligibility_requirements[treatment]"]' => ['checked' => TRUE],       
          ],
          'disabled' => [
            ':input[name="field_eligibility_requirements[california]"]' => ['checked' => TRUE],
            ':input[name="field_eligibility_requirements[at_risk]"]' => ['checked' => TRUE],
            ':input[name="field_eligibility_requirements[340b]"]' => ['checked' => TRUE],
            ':input[name="field_eligibility_requirements[uninsured]"]' => ['checked' => TRUE],
            ':input[name="field_eligibility_requirements[treatment]"]' => ['checked' => TRUE], 
          ],
          'visible' => [
            [
              [':input[name="field_eligibility_requirements[california]"]' => ['checked' => FALSE]],
              'or',
              [':input[name="field_eligibility_requirements[at_risk]"]' => ['checked' => FALSE]],
              'or',
              [':input[name="field_eligibility_requirements[340b]"]' => ['checked' => FALSE]],
              'or',
              [':input[name="field_eligibility_requirements[uninsured]"]' => ['checked' => FALSE]],
              'or',
              [':input[name="field_eligibility_requirements[treatment]"]' => ['checked' => FALSE]],
            ],
          ],
          'enabled' => [
            [
              [':input[name="field_eligibility_requirements[california]"]' => ['checked' => FALSE]],
              'or',
              [':input[name="field_eligibility_requirements[at_risk]"]' => ['checked' => FALSE]],
              'or',
              [':input[name="field_eligibility_requirements[340b]"]' => ['checked' => FALSE]],
              'or',
              [':input[name="field_eligibility_requirements[uninsured]"]' => ['checked' => FALSE]],
              'or',
              [':input[name="field_eligibility_requirements[treatment]"]' => ['checked' => FALSE]],
            ],
          ],
        ],
      ]
    ];

    var_dump($form['field_program_information']['widget'][0]['subform']);

    if()
    $form['field_program_information']['widget'][0]['subform']['field_point_person_name']['widget'][0]['#required'] = 

    // $form['field_program_information']['widget'][0]['subform']['field_point_person_name']['widget'][0]['#states'] = [
    //   'disabled' => [
    //     ':input[name="field_registering_for[pdpt]"]' => ['checked' => TRUE],
    //   ],
    // ];

    // $form['field_program_information']['widget'][0]['subform']['field_additional_contact_informa']['#states'] = [
    //   'disabled' => [
    //     ':input[name="field_registering_for[pdpt]"]' => ['checked' => TRUE],
    //   ],
    // ];

    $form['field_program_information']['#states'] = [
      'visible' => [
        ':input[name="field_eligibility_requirements[california]"]' => ['checked' => TRUE],
        ':input[name="field_eligibility_requirements[at_risk]"]' => ['checked' => TRUE],
        ':input[name="field_eligibility_requirements[340b]"]' => ['checked' => TRUE],
        ':input[name="field_eligibility_requirements[uninsured]"]' => ['checked' => TRUE],
        ':input[name="field_eligibility_requirements[treatment]"]' => ['checked' => TRUE],       
      ],
      'enabled' => [
        ':input[name="field_eligibility_requirements[california]"]' => ['checked' => TRUE],
        ':input[name="field_eligibility_requirements[at_risk]"]' => ['checked' => TRUE],
        ':input[name="field_eligibility_requirements[340b]"]' => ['checked' => TRUE],
        ':input[name="field_eligibility_requirements[uninsured]"]' => ['checked' => TRUE],
        ':input[name="field_eligibility_requirements[treatment]"]' => ['checked' => TRUE], 
      ],
      'invisible' => [
        [
          [':input[name="field_eligibility_requirements[california]"]' => ['checked' => FALSE]],
          'or',
          [':input[name="field_eligibility_requirements[at_risk]"]' => ['checked' => FALSE]],
          'or',
          [':input[name="field_eligibility_requirements[340b]"]' => ['checked' => FALSE]],
          'or',
          [':input[name="field_eligibility_requirements[uninsured]"]' => ['checked' => FALSE]],
          'or',
          [':input[name="field_eligibility_requirements[treatment]"]' => ['checked' => FALSE]],
        ],
      ],
      'disabled' => [
        [
          [':input[name="field_eligibility_requirements[california]"]' => ['checked' => FALSE]],
          'or',
          [':input[name="field_eligibility_requirements[at_risk]"]' => ['checked' => FALSE]],
          'or',
          [':input[name="field_eligibility_requirements[340b]"]' => ['checked' => FALSE]],
          'or',
          [':input[name="field_eligibility_requirements[uninsured]"]' => ['checked' => FALSE]],
          'or',
          [':input[name="field_eligibility_requirements[treatment]"]' => ['checked' => FALSE]],
        ],
      ],
    ];

    // var_dump($form);
  }
}