Renames the 'language' column to 'langcode' in field data tables.
function field_sql_storage_update_8000(&$sandbox) {
// Get field definitions from config, and deleted fields from state system.
$config_names = config_get_storage_names_with_prefix('field.field');
$deleted_fields = Drupal::state()
->get('field.field.deleted') ?: array();
// Ditch UUID keys, we will iterate through deleted fields using a numeric
// index.
$deleted_fields = array_values($deleted_fields);
if (empty($config_names) && empty($deleted_fields)) {
return;
}
if (!isset($sandbox['index'])) {
$sandbox['index'] = 0;
$sandbox['max'] = count($config_names) + count($deleted_fields);
}
// Retrieve the next field definition. When the index exceeds the number of
// 'configuration' fields, use it to iterate on deleted fields.
if (isset($config_names[$sandbox['index']])) {
$field_config = config($config_names[$sandbox['index']])
->get();
}
else {
$field_config = $deleted_fields[$sandbox['index'] - count($config_names)];
}
if ($field_config['storage']['type'] == 'field_sql_storage') {
$field = new Field($field_config);
// Prepare updated schema data structures.
$primary_key_data = array(
'entity_type',
'entity_id',
'deleted',
'delta',
'langcode',
);
$primary_key_revision = array(
'entity_type',
'entity_id',
'revision_id',
'deleted',
'delta',
'langcode',
);
$langcode_index = array(
'langcode',
);
$field_langcode = array(
'type' => 'varchar',
'length' => 32,
'not null' => TRUE,
'default' => '',
);
$table_info = array(
_field_sql_storage_tablename($field) => $primary_key_data,
_field_sql_storage_revision_tablename($field) => $primary_key_revision,
);
foreach ($table_info as $table => $primary_key) {
// Do not update tables which already have the langcode column,
// created during the upgrade before this update function.
if (db_field_exists($table, 'language')) {
db_drop_primary_key($table);
db_drop_index($table, 'language');
db_change_field($table, 'language', 'langcode', $field_langcode);
db_add_primary_key($table, $primary_key);
db_add_index($table, 'langcode', $langcode_index);
}
}
}
$sandbox['index']++;
$sandbox['#finished'] = empty($sandbox['max']) ? 1 : $sandbox['index'] / $sandbox['max'];
}