MongoID 5 Aggregations: NoMethodError: undefined method `[]' for Aggregation

Question

升级到 MongoID 5 后出现此错误： NoMethodError：#

的未定义方法“[]”

代码如下：

result = ::Presentation::Interaction.collection.aggregate(
  [
    user_match_criterias_live(conference),
    ::Presentation::ReportGenerator::DELCOUNTRY_AGGREGATION
  ]
)
return 0 if (result.count < 1)
return result[0]["total"]

因此，聚合已经在使用数组作为参数。

Answer 1

查看结果包含的内容后，我意识到它没有响应 []。但是，它确实响应 .first

代码看起来像

result = ::Presentation::Interaction.collection.aggregate(
  [
    user_match_criterias_live(conference),
    ::Presentation::ReportGenerator::DELCOUNTRY_AGGREGATION
  ]
)
return 0 if (result.count < 1)
return result.first["total"]

MongoID 5 Aggregations: NoMethodError: undefined method `[]' for Aggregation

MongoID 5 Aggregations: NoMethodError: undefined method `[]' for Aggregation

mongoid

aggregate

aggregate-functions

mongoid5