render.py 文件源码

def _render_server_default(default, autogen_context, repr_=True):
    rendered = _user_defined_render("server_default", default, autogen_context)
    if rendered is not False:
        return rendered

    if isinstance(default, sa_schema.DefaultClause):
        if isinstance(default.arg, compat.string_types):
            default = default.arg
        else:
            return _render_potential_expr(default.arg, autogen_context)

    if isinstance(default, string_types) and repr_:
        default = repr(re.sub(r"^'|'$", "", default))

    return default