fieldmapper.py 文件源码

def map_column(self, mode: EditMode, request: Request, node: colander.SchemaNode, model: type, name: str, column: Column, column_type: TypeEngine) -> t.Tuple[colander.SchemaType, dict]:
        """Map non-relationship SQLAlchemy column to Colander SchemaNode.

        :return: Tuple(constructed colander.SchemaType, dict of addtional colander.SchemaNode construction arguments)
        """
        logger.debug("Mapping field %s, mode %s, node %s, column %s, column type %s", name, mode, node, column, column_type)

        # Check for autogenerated columns (updated_at)
        if column.onupdate:
            if mode in (EditMode.edit, EditMode.add):
                return TypeOverridesHandling.drop, {}

        # Don't fill default values when added, as they are automatically populated
        if column.default:
            if mode == EditMode.add:
                return TypeOverridesHandling.drop, {}

        # Never add primary keys
        # NOTE: TODO: We need to preserve ids because of nesting mechanism and groupedit widget wants it id
        if column.primary_key:
            # TODO: Looks like column.autoincrement is set True by default, so we cannot use it here
            if mode in (EditMode.edit, EditMode.add):
                return TypeOverridesHandling.drop, {}

        if column.foreign_keys:

            # Handled by relationship mapper
            return TypeOverridesHandling.drop, {}

        elif isinstance(column_type, (PostgreSQLUUID, columns.UUID)):

            # UUID's cannot be22 edited
            if mode in (EditMode.add, EditMode.edit):
                return TypeOverridesHandling.drop, {}

            # But let's show them
            return fields.UUID(), dict(missing=colander.drop, widget=FriendlyUUIDWidget(readonly=True))

        elif isinstance(column_type, Text):
            return colander.String(), dict(widget=deform.widget.TextAreaWidget())
        elif isinstance(column_type, JSONB):
            return JSONValue(), dict(widget=JSONWidget())
        elif isinstance(column_type, (JSONB, columns.JSONB)):
            # Can't edit JSON
            if mode in (EditMode.add, EditMode.edit):
                return TypeOverridesHandling.drop, {}
            return colander.String(), {}
        elif isinstance(column_type, LargeBinary):
            # Can't edit binary
            return TypeOverridesHandling.drop, {}
        elif isinstance(column_type, Geometry):
            # Can't edit geometry
            return TypeOverridesHandling.drop, {}
        elif isinstance(column_type, (INET, columns.INET)):
            return colander.String(), {}
        else:
            # Default mapping / unknown, let the parent handle
            return TypeOverridesHandling.unknown, {}