java - Spring Data MongoDB 聚合转换？

Question

我无法将以下 mongodb 聚合操作转换为 Spring Data AggregationOperation。我正在使用 Spring Data MongoDB 1.3.2 版本。

db.ads.aggregate( { $group :{ 
 _id : "$adId",
 req : { $sum : 1 }, 
 imp: {$sum: { $cond: [ { $eq: [ "$imped", true ] } , 1, 0 ] } },
 click: {$sum: { $cond: [ { $eq: [ "$clked", true ] } , 1, 0 ] } } ,
 bid: {$sum: { $cond: [ { $eq: [ "$clked", true ] } , "$bid", 0 ] } } } });

我停在这里:

AggregationOperation group = Aggregation.group("adId").count().as("req").sum("imped").as("imp").;;

如果有任何帮助，我将不胜感激。

Answer 1

Currently there is no support to have $cmp/$eq/$ne to be used in group or project aggregation. It would be a good to have feature. Also it would be helpful to improve on some of the documentation/examples for Criteria features.

请让我们在这里投票:https://jira.springsource.org/browse/DATAMONGO-784