From 8e9c705a749a09dd85e7d1217c178ac05d45c583 Mon Sep 17 00:00:00 2001 From: Bob Vincent Date: Tue, 13 Mar 2012 09:34:55 -0400 Subject: [PATCH] Issue #742344 by neilnz, sun, pillarsdotnet, wamilton: Allow forms to set custom validation error messages on required fields. --- core/includes/form.inc | 36 +++++++++++++----- core/modules/simpletest/tests/form.test | 48 +++++++++++++++++++++++- core/modules/simpletest/tests/form_test.module | 25 ++++++++++++- 3 files changed, 97 insertions(+), 12 deletions(-) diff --git a/core/includes/form.inc b/core/includes/form.inc index 6ebbac4e4912a3be96b7c5833990a02daf1716ba..6dd444b5bbe4d52dc5f6e1268a70d08f432be5c1 100644 --- a/core/includes/form.inc +++ b/core/includes/form.inc @@ -1375,16 +1375,11 @@ function _form_validate(&$elements, &$form_state, $form_id = NULL) { $is_empty_string = (is_string($elements['#value']) && drupal_strlen(trim($elements['#value'])) == 0); $is_empty_value = ($elements['#value'] === 0); if ($is_empty_multiple || $is_empty_string || $is_empty_value) { - // Although discouraged, a #title is not mandatory for form elements. In - // case there is no #title, we cannot set a form error message. - // Instead of setting no #title, form constructors are encouraged to set - // #title_display to 'invisible' to improve accessibility. - if (isset($elements['#title'])) { - form_error($elements, $t('!name field is required.', array('!name' => $elements['#title']))); - } - else { - form_error($elements); - } + // Flag this element as #required_but_empty to allow #element_validate + // handlers to set a custom required error message, but without having + // to re-implement the complex logic to figure out whether the field + // value is empty. + $elements['#required_but_empty'] = TRUE; } } @@ -1399,6 +1394,27 @@ function _form_validate(&$elements, &$form_state, $form_id = NULL) { $function($elements, $form_state, $form_state['complete_form']); } } + + // Ensure that a #required form error is thrown, regardless of whether + // #element_validate handlers changed any properties. If $is_empty_value + // is defined, then above #required validation code ran, so the other + // variables are also known to be defined and we can test them again. + if (isset($is_empty_value) && ($is_empty_multiple || $is_empty_string || $is_empty_value)) { + if (isset($elements['#required_error'])) { + form_error($elements, $elements['#required_error']); + } + // A #title is not mandatory for form elements, but without it we cannot + // set a form error message. So when a visible title is undesirable, form + // constructors are encouraged to set #title anyway, and then set + // #title_display to 'invisible'. This improves accessibility. + elseif (isset($elements['#title'])) { + form_error($elements, $t('!name field is required.', array('!name' => $elements['#title']))); + } + else { + form_error($elements); + } + } + $elements['#validated'] = TRUE; } diff --git a/core/modules/simpletest/tests/form.test b/core/modules/simpletest/tests/form.test index 39463740109226786fe0a018434dafbb4ea7597d..418dfa881313f40a35583a624a13a020fdb4e873 100644 --- a/core/modules/simpletest/tests/form.test +++ b/core/modules/simpletest/tests/form.test @@ -204,6 +204,52 @@ class FormsTestCase extends DrupalWebTestCase { } /** + * Tests #required with custom validation errors. + * + * @see form_test_validate_required_form() + */ + function testCustomRequiredError() { + $form = $form_state = array(); + $form = form_test_validate_required_form($form, $form_state); + + // Verify that a custom #required error can be set. + $edit = array(); + $this->drupalPost('form-test/validate-required', $edit, 'Submit'); + + foreach (element_children($form) as $key) { + if (isset($form[$key]['#required_error'])) { + $this->assertNoText(t('!name field is required.', array('!name' => $form[$key]['#title']))); + $this->assertText($form[$key]['#required_error']); + } + elseif (isset($form[$key]['#form_test_required_error'])) { + $this->assertNoText(t('!name field is required.', array('!name' => $form[$key]['#title']))); + $this->assertText($form[$key]['#form_test_required_error']); + } + } + $this->assertNoText(t('An illegal choice has been detected. Please contact the site administrator.')); + + // Verify that no custom validation error appears with valid values. + $edit = array( + 'textfield' => $this->randomString(), + 'checkboxes[foo]' => TRUE, + 'select' => 'foo', + ); + $this->drupalPost('form-test/validate-required', $edit, 'Submit'); + + foreach (element_children($form) as $key) { + if (isset($form[$key]['#required_error'])) { + $this->assertNoText(t('!name field is required.', array('!name' => $form[$key]['#title']))); + $this->assertNoText($form[$key]['#required_error']); + } + elseif (isset($form[$key]['#form_test_required_error'])) { + $this->assertNoText(t('!name field is required.', array('!name' => $form[$key]['#title']))); + $this->assertNoText($form[$key]['#form_test_required_error']); + } + } + $this->assertNoText(t('An illegal choice has been detected. Please contact the site administrator.')); + } + + /** * Test default value handling for checkboxes. * * @see _form_test_checkbox() @@ -1618,7 +1664,7 @@ class FormsFileInclusionTestCase extends DrupalWebTestCase { } /** - * Tests loading a custom specified inlcude. + * Tests loading a custom specified include. */ function testLoadCustomInclude() { $this->drupalPost('form-test/load-include-custom', array(), t('Save')); diff --git a/core/modules/simpletest/tests/form_test.module b/core/modules/simpletest/tests/form_test.module index 4b0f29547266c0b2cd0ebcd4058345391a81fc57..a340f55b567eb33c9c0b7ba92a290ffc1505e5b2 100644 --- a/core/modules/simpletest/tests/form_test.module +++ b/core/modules/simpletest/tests/form_test.module @@ -30,6 +30,12 @@ function form_test_menu() { 'access callback' => TRUE, 'type' => MENU_CALLBACK, ); + $items['form-test/validate-required'] = array( + 'title' => 'Form #required validation', + 'page callback' => 'drupal_get_form', + 'page arguments' => array('form_test_validate_required_form'), + 'access callback' => TRUE, + ); $items['form-test/limit-validation-errors'] = array( 'title' => 'Form validation with some error suppression', 'page callback' => 'drupal_get_form', @@ -369,23 +375,30 @@ function form_test_validate_form_validate(&$form, &$form_state) { */ function form_test_validate_required_form($form, &$form_state) { $options = drupal_map_assoc(array('foo', 'bar')); + $validate = array('form_test_validate_required_form_element_validate'); $form['textfield'] = array( '#type' => 'textfield', - '#title' => 'Textfield', + '#title' => 'Name', '#required' => TRUE, + '#required_error' => t('Please enter a name.'), + '#element_validate' => $validate, ); $form['checkboxes'] = array( '#type' => 'checkboxes', '#title' => 'Checkboxes', '#options' => $options, '#required' => TRUE, + '#form_test_required_error' => t('Please choose at least one option.'), + '#element_validate' => $validate, ); $form['select'] = array( '#type' => 'select', '#title' => 'Select', '#options' => $options, '#required' => TRUE, + '#form_test_required_error' => t('Please select something.'), + '#element_validate' => $validate, ); $form['radios'] = array( '#type' => 'radios', @@ -411,6 +424,16 @@ function form_test_validate_required_form_submit($form, &$form_state) { } /** + * Form element validation handler for 'Name' field in form_test_validate_required_form(). + */ +function form_test_validate_required_form_element_validate($element, &$form_state) { + // Set a custom validation error on the #required element. + if (!empty($element['#required_but_empty']) && isset($element['#form_test_required_error'])) { + form_error($element, $element['#form_test_required_error']); + } +} + +/** * Builds a simple form with a button triggering partial validation. */ function form_test_limit_validation_errors_form($form, &$form_state) { -- 1.7.5.4