本文介紹了mongodb如何對文檔內數組進行過濾的方法步驟，分享給大家，具體如下：

mongodb文檔內包含數組，需要將數組中符合條件的數據過濾出來并返回結果集，可以用兩種方式來查詢group或filter。
數據源：

{
  "_id" : ObjectId("5bbcc0c9a74db9804e78a157"),
  "uid" : "1000001",
  "name" : "zhangsan",
  "addrs" : [ 
    {
      "is_query" : "1",
      "city" : "北京"
    }, 
    {
      "is_query" : "0",
      "city" : "上海"
    }, 
    {
      "is_query" : "1",
      "city" : "深圳"
    }
  ]
}
{
  "_id" : ObjectId("5bbcc167a74db9804e78a172"),
  "uid" : "1000002",
  "name" : "lisi",
  "addrs" : [ 
    {
      "is_query" : "0",
      "city" : "北京"
    }, 
    {
      "is_query" : "0",
      "city" : "上海"
    }, 
    {
      "is_query" : "1",
      "city" : "深圳"
    }
  ]
}