render.py 文件源码

def _render_potential_expr(value, autogen_context, wrap_in_text=True):
    if isinstance(value, sql.ClauseElement):
        if compat.sqla_08:
            compile_kw = dict(compile_kwargs={'literal_binds': True})
        else:
            compile_kw = {}

        if wrap_in_text:
            template = "%(prefix)stext(%(sql)r)"
        else:
            template = "%(sql)r"

        return template % {
            "prefix": _sqlalchemy_autogenerate_prefix(autogen_context),
            "sql": compat.text_type(
                value.compile(dialect=autogen_context['dialect'],
                              **compile_kw)
            )
        }

    else:
        return repr(value)