我怎样才能得到一个按"减少"的降序排序的映射/减少结果;值";价值如果也使用列表功能可以实

How can I get a map/reduce result which is sorted within descending order of the "value" value?if also using list function can achieve that?

本文关键字：quot 如果 结果 功能 列表 映射 一个 降序 排序 减少      更新时间：2023-09-26

我有视图映射和reduce，如下所示：地图：

   function(doc) {
           if(doc.type){
            var usersLength = doc.users.length;
            for (var i = 0; i < usersLength ; i++) {
                    emit([doc.users[i].userid,doc.Service.ownId], 1);
                }
            }
        }

减少：

 function(keys, values, rereduce)
    {
      return sum(values);
    }

然后调用如下视图：_design/aaa/_view/getUserId?group=true&group_level=2&startkey=["111111"]&endkey=["111111",{}]

我可以得到下面的结果集：

{"rows":[
{"key":["111111",""],"value":7},
{"key":["111111","FFFF26"],"value":1},
{"key":["111111","FFFF44"],"value":7},
{"key":["111111","FFFF34"],"value":2}
]}

然而，我希望上面的结果集按照"value"值的降序进行排序。如果也使用列表功能可以实现吗？预期结果如下：

{"rows":[
{"key":["111111",""],"value":7},
{"key":["111111","FFFF44"],"value":7},
{"key":["111111","FFFF34"],"value":2},
{"key":["111111","FFFF26"],"value":1}
]}

如果你想对结果集进行排序，你必须选择一个按值降序排序的结果集，你可以使用比较器回调进行排序：

// ES6 Syntax
let originalResult = {
"rows":[
  {"key":["111111",""],"value":7},
  {"key":["111111","FFFF26"],"value":1},
  {"key":["111111","FFFF44"],"value":7},
  {"key":["111111","FFFF34"],"value":2}
]}
let newResult = {
  rows: originalResult.rows.sort((a, b) => b.value - a.value)
}
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