protected CommentStorageSchema::getSharedTableFieldSchema(FieldStorageDefinitionInterface $storage_definition, $table_name, array $column_mapping)
Gets the schema for a single field definition.
Entity types may override this method in order to optimize the generated schema for given field. While all optimizations that apply to a single field have to be added here, all cross-field optimizations should be via SqlContentEntityStorageSchema::getEntitySchema() instead; e.g., an index spanning multiple fields.
Parameters
\Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition: The storage definition of the field whose schema has to be returned.
string $table_name: The name of the table columns will be added to.
string[] $column_mapping: A mapping of field column names to database column names.
Return value
array The schema definition for the table with the following keys:
- fields: The schema definition for the each field columns.
- indexes: The schema definition for the indexes.
- unique keys: The schema definition for the unique keys.
- foreign keys: The schema definition for the foreign keys.
Throws
\Drupal\Core\Field\FieldException Exception thrown if the schema contains reserved column names.
Overrides SqlContentEntityStorageSchema::getSharedTableFieldSchema
File
- core/modules/comment/src/CommentStorageSchema.php, line 45
Class
- CommentStorageSchema
- Defines the comment schema handler.
Namespace
Drupal\comment
Code
protected function getSharedTableFieldSchema(FieldStorageDefinitionInterface $storage_definition, $table_name, array $column_mapping) {
$schema = parent::getSharedTableFieldSchema($storage_definition, $table_name, $column_mapping);
$field_name = $storage_definition->getName();
if ($table_name == 'comment_field_data') {
// Remove unneeded indexes.
unset($schema['indexes']['comment_field__pid__target_id']);
unset($schema['indexes']['comment_field__entity_id__target_id']);
switch ($field_name) {
case 'thread':
// Improves the performance of the comment__num_new index defined
// in getEntitySchema().
$schema['fields'][$field_name]['not null'] = TRUE;
break;
case 'created':
$this->addSharedTableFieldIndex($storage_definition, $schema, TRUE);
break;
case 'uid':
$this->addSharedTableFieldForeignKey($storage_definition, $schema, 'users', 'uid');
}
}
return $schema;
}
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