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我正在尝试打印 func.count() 调用的值，但是一旦我进入我的 mako 模板，我就无法弄清楚它是如何命名的。我试图在调试器行 pprint 和 dict 变量，但它们作为对象返回，所以我不确定从这里去哪里。

这是我正在执行的视图的代码：


    TodayList = DBSession.query(
    func.count(ExtendedCDR.uniqueid),ExtendedCDR,ExtensionMap)
    .filter(or_(
         ExtensionMap.exten == ExtendedCDR.extension,
         ExtensionMap.prev_exten == ExtendedCDR.extension))
    .filter(ExtendedCDR.start > func.curdate())
    .group_by(ExtendedCDR.extension)
    .order_by(func.count(ExtendedCDR.uniqueid).desc())
    .all()

当此代码运行时，sql 查询的调试返回：

2012-11-09 19:16:10,392 INFO [sqlalchemy.engine.base.Engine][Dummy-3] SELECT count(cdr_extended.uniqueid) AS count_1, cdr_extended.uniqueid AS cdr_extended_uniqueid, cdr_extended.start AS cdr_extended_start, cdr_extended.end AS cdr_extended_end, cdr_extended.clid AS cdr_extended_clid, cdr_extended.src AS cdr_extended_src, cdr_extended.dst AS cdr_extended_dst, cdr_extended.dcontext AS cdr_extended_dcontext, cdr_extended.channel AS cdr_extended_channel, cdr_extended.dstchannel AS cdr_extended_dstchannel, cdr_extended.lastapp AS cdr_extended_lastapp, cdr_extended.lastdata AS cdr_extended_lastdata, cdr_extended.duration AS cdr_extended_duration, cdr_extended.billsec AS cdr_extended_billsec, cdr_extended.disposition AS cdr_extended_disposition, cdr_extended.amaflags AS cdr_extended_amaflags, cdr_extended.accountcode AS cdr_extended_accountcode, cdr_extended.userfield AS cdr_extended_userfield, cdr_extended.extension AS cdr_extended_extension, concat(concat(ext_map.FName, %s), ext_map.LName) AS anon_1, ext_map.exten AS ext_map_exten, ext_map.FName AS ext_map_FName, ext_map.LName AS ext_map_LName, ext_map.login_name AS ext_map_login_name, ext_map.isManager AS ext_map_isManager, ext_map.prev_exten AS ext_map_prev_exten FROM cdr_extended, ext_map WHERE (ext_map.exten = cdr_extended.extension OR ext_map.prev_exten = cdr_extended.extension) AND cdr_extended.start > curdate() GROUP BY cdr_extended.extension ORDER BY count(cdr_extended.uniqueid) DESC

这是我的 mako 模板代码：


        % for topentry in TopToday:
                
                        ${topentry.ExtensionMap.AssociateName}
                        ${topentry.count_1}
                
        % endfor

但是，Mako 会抛出 ${topentry.count_1} 不存在的异常，尽管人们会假设它会给出上面的 DEBUG 输出。

有谁知道我将如何根据 python/Mako 找到 count_1 的名称？

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2 回答 2

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您应该能够使用 命名查询的返回值.label()。例如，DBSession.query(func.count(ExtendedCDR.unique_id).label('count'), ...)。

于 2012-11-09T19:56:47.583 回答
0

count_1不是您的对象的一部分，它是为 count 提取的func.count()，这不是您的对象的一行。您需要找出 SQLAlchemy 对该值的真正作用。

于 2012-11-09T19:38:58.200 回答