In a custom module, I'm creating a new field and instance for a custom entity type like this:

function mymodule_install() {
  if (!field_info_field('mymodule_field')) {
    $field = array( .... );
  if (!field_info_instance('mymodule_entity','mymodule_field', 'bundle1')) {
    $instance = array( .... );

function mymodule_uninstall() {
  if ($instance = field_info_instance('mymodule_entity','mymodule_field', 'bundle1')) {
  if (field_info_field('mymodule_field')) {

...and the field and instance gets created properly. However upon uninstalling the module, only the field tables are being deleted while the field instance is still there in the field_config_instance table still having deleted = 0.

Debugging the uninstall process reveals that field_info_instance (and field_read_instances) is returning NULL...

Anyone knows what I'm doing wrong? I'm on a fresh Drupal 7.23 install...

1 Answer 1


You don't need field_delete_instance separately, because field_delete_field has it inside.

According to deleted column in field_config (you can skip this value in field_config_instance if you're deleting whole field) debug field_delete_field function.

  • field_delete_field() still doesn't delete the entry in the field_config_instance table... Nov 20, 2013 at 11:42
  • field_config_instance entry will be removed only after all field_data_ and field_revision_ entries are deleted. May be your batch size in purge is not big enough. Check the deleted column in field_config, field_config_instance and names of deleted field tables to be sure that field_delete_field was completed successful.
    – m1r1k
    Nov 20, 2013 at 13:11
  • The field tables are deleted successfully and also their entry in field_config is completely removed. The purging function is doing well.. However field_config_instancestill contains the instance entries with deleted = 0.. Nov 20, 2013 at 13:58
  • Try to run drush cron manually now, it should get cleared otherwise you have a trouble somewhere :)
    – m1r1k
    Nov 20, 2013 at 14:11
  • Unfortunately no luck. Well, I guess my OP still remains unsolved. Quite odd since it's on a fresh 7.23 install. Nov 20, 2013 at 14:25

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