如何修复“文件系统中缺少以下模块...”警告消息 How to fix "The following module is missing from the file system..." warning messages 有大用 有大大用 有大大大用 有大大大大用

If you see a PHP warning such as "The following module is missing from the file system..." (or similar) on your site, this page explains how to fix it.

The warning was introduced in Drupal 7.50 and is displayed when Drupal is attempting to find a module or theme in the file system, but either cannot find it or does not find it in the expected place. Usually this indicates a problem with your site. It is not a major problem, but one which should ideally be fixed if possible. (See the change record for more information on why this warning was added, and these instructions for how to ensure that warning messages like this one are never displayed to your site's end users, but rather only recorded in the administrative logs.)

Note that the problem or inconsistency on your site, which is now causing this warning, might have been existing for a long time already, without any visible symptoms. The introduction of the warning message in Drupal 7.50 does make it visible.

There are a few possible causes and corresponding solutions.

You removed a module from the file system without disabling and uninstalling it

Possible solutions:

• Restore the module and actually disable and uninstall it (recommended if possible): First, restore the module to its original location in the file system. Then either go to the Modules page and disable/uninstall it from there, or use Drush (drush dis module_name && drush pm-uninstall module_name, where module_name should be replaced with the name of the module).

• Manually remove all traces of the module in the database. This is not the recommended solution because many modules do important cleanup tasks during the disable/uninstall process, and this solution will result in those being skipped. In many cases it will mean that the module will be broken if an attempt is ever made to use it again on this site. However if you decide to use this solution (e.g. for obsolete modules that do not even exist anymore and that can never be added back), it can be done in several ways. Here are some examples:

• Drupal 7

• Use the point-and-click, administrative interface provided by drupal.org contrib modules.
  Option #1 - Module Missing Message Fixer
  Option #2 - Missing Module
  

• Use Drush

  For example, run a command similar to the following:

  drush sql-query "DELETE from system where type = 'module' AND name IN ('old_module1','old_module2');"
  

  When done, clear the site's caches (e.g. drush cc all).

• Write an update hook in a custom module

  You can use code similar to the example below, which will remove the missing modules when update.php is run:

  /**
   * Delete {system} records for long-lost modules.
   */
  function MYMODULE_update_7100() {
    $modules = array(
      'old_module1',
      'old_module2',
      'old_module3',
    );
    db_delete('system')
      ->condition('name', $modules, 'IN')
      ->condition('type', 'module')
      ->execute();
  }

•  

• Drupal 8/9

1. Enable devel module and on the administrative interface go to /devel/config, edit core.extension delete missing module entry.

2. Use the point-and-click, administrative interface provided by drupal.org contrib modules.
   Option #1 - Module Missing Message Fixer

3. Use Drush

   drush sql-query "DELETE FROM key_value WHERE collection='system.schema' AND name='module_name';"
   When done, clear the site's caches (e.g. drush cr).
   Also make sure that the CMI folder is cleansed of the broken uninstalled module. There may be some yml files left over and / or some system config. (this is all not the best way to do things as a FYI. However with Drupal 8 being so young, things don't go as planned always).

4. Write an update hook in a custom module

   You can use code similar to the example below, which will remove the missing modules when update.php is run:

   /**
    * Fix long lost modules are missing from the filesystem.
    */
   function MYMODULE_update_8100(&$sandbox) {
     $modules = [
       'old_module1',
       'old_module2',
       'old_module3',
     ];
     \Drupal::database()->delete('key_value')
       ->condition('collection', 'system.schema')
       ->condition('name', $modules, 'IN')
       ->execute();
   }
   

1. Use the point-and-click, administrative interface provided by drupal.org contrib modules.
   Option #1 - Module Missing Message Fixer
   Option #2 - Missing Module
   

2. Use Drush

   For example, run a command similar to the following:

   drush sql-query "DELETE from system where type = 'module' AND name IN ('old_module1','old_module2');"
   

   When done, clear the site's caches (e.g. drush cc all).

3. Write an update hook in a custom module

   You can use code similar to the example below, which will remove the missing modules when update.php is run:

   /**
    * Delete {system} records for long-lost modules.
    */
   function MYMODULE_update_7100() {
     $modules = array(
       'old_module1',
       'old_module2',
       'old_module3',
     );
     db_delete('system')
       ->condition('name', $modules, 'IN')
       ->condition('type', 'module')
       ->execute();
   }
   

You moved the module inside your Drupal installation

Possible solutions:

• Clear the site's caches so the new location of the module is registered. Or,

• Move the module back to its original location in the file system.

来自  https://www.drupal.org/node/2487215