aggregate match时使用操作符是无效的 - WXOPEN Club

文档最后那行实际输出的结果是7，而不是3，说明aggregate match时使用操作符_.gt是无效的，等同没有此条件，实际返回所有数据。

{ "_id" : "1", "author" : "stark", "score" : 80 }

{ "_id" : "2", "author" : "stark", "score" : 85 }

{ "_id" : "3", "author" : "bob", "score" : 60 }

{ "_id" : "4", "author" : "li", "score" : 55 }

{ "_id" : "5", "author" : "jimmy", "score" : 60 }

{ "_id" : "6", "author" : "li", "score" : 94 }

{ "_id" : "7", "author" : "justan", "score" : 95 }

const db = wx.cloud.database()

const _ = db.command

const $ = _.aggregate

db.collection('article')

.aggregate()

.match({

score: _.gt(80)

})

.group({

_id: null,

count: $.sum(1)

})

.end()

预期结果：

{ "_id" : null, "count" : 3 }

实际结果：

{ "_id" : null, "count" : 7 }

我猜你的表里，score是string不是number