Home >> Archive >> 2016 >> Drupal 7 hook_update() snippets for features and configuration management
Thursday 8 December 2016
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Drupal 7

Here some snippets that we use for things that Features module cannot do.

The Features module can install/create things for you, but it will not remove things that are not declared in Features. Note that the behavior of Drupal 8 Configuration Management is different. Drupal 8 CM *will* delete things that are not declared.

Most of those actions we perform in hook_update() and are related to 'clean-up' actions like removing a field.


/**
* Remove field.
*
* Deletes a field with all it's instances.
*/
$field_list = array(
'field_name_1',
'field_name_2',
);
foreach ($field_list as $field) {
field_delete_field($field);
}


/**
* Remove field-instance.
*
* Delete a field-instance (and removes field_base only if there or no other
* instances).
*/
$field_instances_list = array(
array(
'entity_type' => 'node',
'field_name' => 'body',
'bundle_name' => 'page',
),
);
foreach ($field_instances_list as $info) {
if ($instance = field_info_instance($info['entity_type'], $info['field_name'], $info['bundle_name'])) {
field_delete_instance($instance);
}
}


/**
* Remove Views.
*/
$views_list = array(
'view_name_1',
'view_name_2',
);
foreach ($views_list as $view_name) {
if ($view = views_get_view($view_name)) {
views_delete_view($view);
}
}


/**
* Remove variable.
*/
$variable_list = array(
'variable_name_1',
'variable_name_2',
);
foreach ($variable_list as $variable) {
variable_del($variable);
}


/**
* Uninstall a module.
*/
$modules = array(
'module_1',
'module_2',
);
foreach ($modules as $module) {
if (module_exists($module)) {
module_disable(array($module));
drupal_uninstall_modules(array($module));
}
}


/**
* Remove Context.
*/
$context_list = array(
'context_name_1',
'context_name_2',
);
foreach ($context_list as $context_name) {
if ($context = context_load('motorcycle_manuals')) {
context_delete($context);
}
}


/**
* Uninstall a Language.
*/
$langcode_list = array(
'sp',
'fr',
);
// Will remove Spanish and French language.
module_load_include('admin.inc', 'locale');
foreach ($langcode_list as $langcode) {
$form_state['values']['langcode'] = $langcode;
locale_languages_delete_form_submit(array(), $form_state);
}


/**
* Uninstall a Locale translation by Identifier.
*
* See database tables "locales_source" and "locales_target".
*/
$locale_translation_list = array(
'lid_1',
'lid_2',
);
module_load_include('admin.inc', 'locale');
foreach ($locale_translation_list as $lid) {
$form_state['values']['lid'] = $lid;
locale_translate_delete_form_submit(array(), $form_state);
}


/**
* Uninstall a theme.
*/
$themes = array(
'theme_1',
);
foreach ($themes as $theme) {
if (drupal_theme_access($theme)) {
theme_disable(array($theme));
}
}

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