SqlContentEntityStorageSchema::getDedicatedTableSchema

protected SqlContentEntityStorageSchema::getDedicatedTableSchema(FieldStorageDefinitionInterface $storage_definition, ContentEntityTypeInterface $entity_type = NULL)

protected function getDedicatedTableSchema(FieldStorageDefinitionInterface $storage_definition, ContentEntityTypeInterface $entity_type = NULL) {
  $description_current = "Data storage for {$storage_definition->getTargetEntityTypeId()} field {$storage_definition->getName()}.";
  $description_revision = "Revision archive storage for {$storage_definition->getTargetEntityTypeId()} field {$storage_definition->getName()}.";

  $id_definition = $this->fieldStorageDefinitions[$this->entityType->getKey('id')];
  if ($id_definition->getType() == 'integer') {
    $id_schema = array(
      'type' => 'int',
      'unsigned' => TRUE,
      'not null' => TRUE,
      'description' => 'The entity id this data is attached to',
    );
  }
  else {
    $id_schema = array(
      'type' => 'varchar_ascii',
      'length' => 128,
      'not null' => TRUE,
      'description' => 'The entity id this data is attached to',
    );
  }

  // Define the revision ID schema.
  if (!$this->entityType->isRevisionable()) {
    $revision_id_schema = $id_schema;
    $revision_id_schema['description'] = 'The entity revision id this data is attached to, which for an unversioned entity type is the same as the entity id';
  }
  elseif ($this->fieldStorageDefinitions[$this->entityType->getKey('revision')]->getType() == 'integer') {
    $revision_id_schema = array(
      'type' => 'int',
      'unsigned' => TRUE,
      'not null' => TRUE,
      'description' => 'The entity revision id this data is attached to',
    );
  }
  else {
    $revision_id_schema = array(
      'type' => 'varchar',
      'length' => 128,
      'not null' => TRUE,
      'description' => 'The entity revision id this data is attached to',
    );
  }

  $data_schema = array(
    'description' => $description_current,
    'fields' => array(
      'bundle' => array(
        'type' => 'varchar_ascii',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The field instance bundle to which this row belongs, used when deleting a field instance',
      ),
      'deleted' => array(
        'type' => 'int',
        'size' => 'tiny',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'A boolean indicating whether this data item has been deleted'
      ),
      'entity_id' => $id_schema,
      'revision_id' => $revision_id_schema,
      'langcode' => array(
        'type' => 'varchar_ascii',
        'length' => 32,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The language code for this data item.',
      ),
      'delta' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => 'The sequence number for this data item, used for multi-value fields',
      ),
    ),
    'primary key' => array('entity_id', 'deleted', 'delta', 'langcode'),
    'indexes' => array(
      'bundle' => array('bundle'),
      'revision_id' => array('revision_id'),
    ),
  );

  // Check that the schema does not include forbidden column names.
  $schema = $storage_definition->getSchema();
  $properties = $storage_definition->getPropertyDefinitions();
  $table_mapping = $this->storage->getTableMapping();
  if (array_intersect(array_keys($schema['columns']), $table_mapping->getReservedColumns())) {
    throw new FieldException("Illegal field column names on {$storage_definition->getName()}");
  }

  // Add field columns.
  foreach ($schema['columns'] as $column_name => $attributes) {
    $real_name = $table_mapping->getFieldColumnName($storage_definition, $column_name);
    $data_schema['fields'][$real_name] = $attributes;
    // A dedicated table only contain rows for actual field values, and no
    // rows for entities where the field is empty. Thus, we can safely
    // enforce 'not null' on the columns for the field's required properties.
    $data_schema['fields'][$real_name]['not null'] = $properties[$column_name]->isRequired();
  }

  // Add indexes.
  foreach ($schema['indexes'] as $index_name => $columns) {
    $real_name = $this->getFieldIndexName($storage_definition, $index_name);
    foreach ($columns as $column_name) {
      // Indexes can be specified as either a column name or an array with
      // column name and length. Allow for either case.
      if (is_array($column_name)) {
        $data_schema['indexes'][$real_name][] = array(
          $table_mapping->getFieldColumnName($storage_definition, $column_name[0]),
          $column_name[1],
        );
      }
      else {
        $data_schema['indexes'][$real_name][] = $table_mapping->getFieldColumnName($storage_definition, $column_name);
      }
    }
  }

  // Add unique keys.
  foreach ($schema['unique keys'] as $index_name => $columns) {
    $real_name = $this->getFieldIndexName($storage_definition, $index_name);
    foreach ($columns as $column_name) {
      // Unique keys can be specified as either a column name or an array with
      // column name and length. Allow for either case.
      if (is_array($column_name)) {
        $data_schema['unique keys'][$real_name][] = array(
          $table_mapping->getFieldColumnName($storage_definition, $column_name[0]),
          $column_name[1],
        );
      }
      else {
        $data_schema['unique keys'][$real_name][] = $table_mapping->getFieldColumnName($storage_definition, $column_name);
      }
    }
  }

  // Add foreign keys.
  foreach ($schema['foreign keys'] as $specifier => $specification) {
    $real_name = $this->getFieldIndexName($storage_definition, $specifier);
    $data_schema['foreign keys'][$real_name]['table'] = $specification['table'];
    foreach ($specification['columns'] as $column_name => $referenced) {
      $sql_storage_column = $table_mapping->getFieldColumnName($storage_definition, $column_name);
      $data_schema['foreign keys'][$real_name]['columns'][$sql_storage_column] = $referenced;
    }
  }

  $dedicated_table_schema = array($table_mapping->getDedicatedDataTableName($storage_definition) => $data_schema);

  // If the entity type is revisionable, construct the revision table.
  $entity_type = $entity_type ? : $this->entityType;
  if ($entity_type->isRevisionable()) {
    $revision_schema = $data_schema;
    $revision_schema['description'] = $description_revision;
    $revision_schema['primary key'] = array('entity_id', 'revision_id', 'deleted', 'delta', 'langcode');
    $revision_schema['fields']['revision_id']['not null'] = TRUE;
    $revision_schema['fields']['revision_id']['description'] = 'The entity revision id this data is attached to';
    $dedicated_table_schema += array($table_mapping->getDedicatedRevisionTableName($storage_definition) => $revision_schema);
  }

  return $dedicated_table_schema;
}