138 lines
6.5 KiB
Plaintext
138 lines
6.5 KiB
Plaintext
<?php
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/**
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* @file
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* Defines selection, check box and radio button widgets for text and numeric fields.
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*/
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use Drupal\Core\Entity\FieldableEntityInterface;
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use Drupal\Core\Entity\Exception\FieldStorageDefinitionUpdateForbiddenException;
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use Drupal\Core\Field\FieldStorageDefinitionInterface;
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use Drupal\Core\Routing\RouteMatchInterface;
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use Drupal\field\FieldStorageConfigInterface;
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/**
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* Implements hook_help().
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*/
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function options_help($route_name, RouteMatchInterface $route_match) {
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switch ($route_name) {
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case 'help.page.options':
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$output = '';
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$output .= '<h3>' . t('About') . '</h3>';
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$output .= '<p>' . t('The Options module allows you to create fields where data values are selected from a fixed list of options. Usually these items are entered through a select list, checkboxes, or radio buttons. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":options_do">online documentation for the Options module</a>.', [':field' => \Drupal::url('help.page', ['name' => 'field']), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#', ':options_do' => 'https://www.drupal.org/documentation/modules/options']) . '</p>';
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$output .= '<h3>' . t('Uses') . '</h3>';
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$output .= '<dl>';
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$output .= '<dt>' . t('Managing and displaying list fields') . '</dt>';
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$output .= '<dd>' . t('The <em>settings</em> and the <em>display</em> of the list fields can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', [':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#']) . '</dd>';
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$output .= '<dt>' . t('Defining option keys and labels') . '</dt>';
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$output .= '<dd>' . t('When you define the list options you can define a key and a label for each option in the list. The label will be shown to the users while the key gets stored in the database.') . '</dd>';
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$output .= '<dt>' . t('Choosing list field type') . '</dt>';
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$output .= '<dd>' . t('There are three types of list fields, which store different types of data: <em>float</em>, <em>integer</em> or, <em>text</em>. The <em>float</em> type allows storing approximate decimal values. The <em>integer</em> type allows storing whole numbers, such as years (for example, 2012) or values (for example, 1, 2, 5, 305). The <em>text</em> list field type allows storing text values. No matter which type of list field you choose, you can define whatever labels you wish for data entry.') . '</dd>';
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$output .= '</dl>';
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return $output;
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}
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}
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/**
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* Implements hook_ENTITY_TYPE_update() for 'field_storage_config'.
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*/
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function options_field_storage_config_update(FieldStorageConfigInterface $field_storage) {
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drupal_static_reset('options_allowed_values');
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}
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/**
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* Implements hook_ENTITY_TYPE_delete() for 'field_storage_config'.
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*/
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function options_field_storage_config_delete(FieldStorageConfigInterface $field_storage) {
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drupal_static_reset('options_allowed_values');
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}
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/**
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* Returns the array of allowed values for a list field.
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*
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* The strings are not safe for output. Keys and values of the array should be
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* sanitized through \Drupal\Core\Field\AllowedTagsXssTrait::fieldFilterXss()
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* before being displayed.
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*
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* @param \Drupal\Core\Field\FieldStorageDefinitionInterface $definition
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* The field storage definition.
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* @param \Drupal\Core\Entity\FieldableEntityInterface|null $entity
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* (optional) The specific entity when this function is called from the
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* context of a specific field on a specific entity. This allows custom
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* 'allowed_values_function' callbacks to either restrict the values or
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* customize the labels for particular bundles and entities. NULL when
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* there is not a specific entity available, such as for Views filters.
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*
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* @return array
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* The array of allowed values. Keys of the array are the raw stored values
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* (number or text), values of the array are the display labels.
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*
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* @see callback_allowed_values_function()
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*/
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function options_allowed_values(FieldStorageDefinitionInterface $definition, FieldableEntityInterface $entity = NULL) {
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$allowed_values = &drupal_static(__FUNCTION__, []);
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$cache_keys = [$definition->getTargetEntityTypeId(), $definition->getName()];
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if ($entity) {
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$cache_keys[] = 'entity';
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}
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$cache_id = implode(':', $cache_keys);
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if (!isset($allowed_values[$cache_id])) {
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$function = $definition->getSetting('allowed_values_function');
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// If $cacheable is FALSE, then the allowed values are not statically
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// cached. See options_test_dynamic_values_callback() for an example of
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// generating dynamic and uncached values.
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$cacheable = TRUE;
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if (!empty($function)) {
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$values = $function($definition, $entity, $cacheable);
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}
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else {
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$values = $definition->getSetting('allowed_values');
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}
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if ($cacheable) {
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$allowed_values[$cache_id] = $values;
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}
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else {
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return $values;
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}
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}
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return $allowed_values[$cache_id];
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}
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/**
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* Implements hook_field_storage_config_update_forbid().
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*/
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function options_field_storage_config_update_forbid(FieldStorageConfigInterface $field_storage, FieldStorageConfigInterface $prior_field_storage) {
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if ($field_storage->getTypeProvider() == 'options' && $field_storage->hasData()) {
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// Forbid any update that removes allowed values with actual data.
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$allowed_values = $field_storage->getSetting('allowed_values');
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$prior_allowed_values = $prior_field_storage->getSetting('allowed_values');
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$lost_keys = array_keys(array_diff_key($prior_allowed_values, $allowed_values));
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if (_options_values_in_use($field_storage->getTargetEntityTypeId(), $field_storage->getName(), $lost_keys)) {
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throw new FieldStorageDefinitionUpdateForbiddenException(t('A list field (@field_name) with existing data cannot have its keys changed.', ['@field_name' => $field_storage->getName()]));
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}
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}
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}
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/**
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* Checks if a list of values are being used in actual field values.
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*/
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function _options_values_in_use($entity_type, $field_name, $values) {
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if ($values) {
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$result = \Drupal::entityQuery($entity_type)
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->condition($field_name . '.value', $values, 'IN')
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->count()
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->accessCheck(FALSE)
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->range(0, 1)
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->execute();
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if ($result) {
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return TRUE;
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}
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}
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return FALSE;
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}
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