我正在使用mongoDB数据库在rails上开发ruby站点。我是mongoDB的初学者,我想用多个键对数据进行排序。我的一个收藏如下所示。Mongodb - 与多个字段的ROR排序
dd_users
{
"_id": ObjectId("4e9bcbdb1d41c866c600004e"),
"name": "Ram",
"score":5
"created_at": ISODate("2011-10-17T06: 31: 55.0Z"),
}
{
"_id": ObjectId("4e9bcbdb1d41c866c600004f"),
"name": "Robert",
"score":1
"created_at": ISODate("2011-10-12T06: 31: 55.0Z"),
}
{
"_id": ObjectId("4e9bcbdb1d41c866c600004g"),
"name": "Molly Bracken",
"score":3
"created_at": ISODate("2011-10-15T06: 31: 55.0Z"),
}
{
"_id": ObjectId("4e9bcbdb1d41c866c600005k"),
"name": "Ninou-Co France",
"score":5
"created_at": ISODate("2011-10-16T06: 31: 55.0Z"),
}
我想按照'score'和'created_at'的降序排列记录。 我用mongomapper查询为 1.DdUser.where({“name”=> {“$ ne”=> nil})。sort([[“score”,“desc”],[“created_at”,“降序“]])。但是我只按照得分的顺序得到结果。
我期待的结果
{
"_id": ObjectId("4e9bcbdb1d41c866c600004e"),
"name": "Ram",
"score":5
"created_at": ISODate("2011-10-17T06: 31: 55.0Z"),
}
{
"_id": ObjectId("4e9bcbdb1d41c866c600005k"),
"name": "Ninou-Co France",
"score":5
"created_at": ISODate("2011-10-16T06: 31: 55.0Z"),
}
{
"_id": ObjectId("4e9bcbdb1d41c866c600004g"),
"name": "Molly Bracken",
"score":3
"created_at": ISODate("2011-10-15T06: 31: 55.0Z"),
}
{
"_id": ObjectId("4e9bcbdb1d41c866c600004f"),
"name": "Robert",
"score":1
"created_at": ISODate("2011-10-12T06: 31: 55.0Z"),
}
不工作:(。 – Sreeraj