base.py 文件源码

def get_column_specification(self, column, **kwargs):
        coltype = self.dialect.type_compiler.process(column.type)
        colspec = self.preparer.format_column(column) + " " + coltype
        default = self.get_column_default_string(column)
        if default is not None:
            colspec += " DEFAULT " + default

        if not column.nullable:
            colspec += " NOT NULL"

        if (column.primary_key and
            column.table.kwargs.get('sqlite_autoincrement', False) and
            len(column.table.primary_key.columns) == 1 and
            issubclass(column.type._type_affinity, sqltypes.Integer) and
            not column.foreign_keys):
                colspec += " PRIMARY KEY AUTOINCREMENT"

        return colspec