node.js - 通过在 mongoose 中填充匹配结果来查找文档

Question

对于 Ecample，来自 mongoose 的数据:

数据学生:

[{
  "_id": ObjectId("5afbb519a7fe344ff8db67e6"),
  "name":"Jack",
  "age":20
  ...
},{
  "_id": ObjectId("5afbb534a7fe344gf7db64e7"),
  "name":"Joni",
  "age":20
  ...
}]

数据事件:

[{
  "_id": ObjectId("5afbb554a7fe344ff8db67e9"),
  "name":"Going to Market",
  "student": ObjectId("5afbb519a7fe344ff8db67e6")
  ...
},{
  "_id": ObjectId("5afbb784a7fe344gf7db64e2"),
  "name":"Playing with Friends",
  "student":ObjectId("5afbb534a7fe344gf7db64e7")
  ...
}]

我想找到一个关于用正则表达式填充的条件的数据库&这就是我所做的:

let term = new Regex('Jack','i');        
let result = await Activities.find({})
            .populate('student', null, { name: { $regex: term } })
            .exec();

但结果总是返回Activites的所有数据(正则表达式查询不起作用)

我应该做什么？

Answer 1

您应该尝试使用match

let result = await Activities.find({})
            .populate({ path: 'student', match: { name: { $regex: term } } })
            .exec();