我在用户数组中有friends数组，我需要通过电子邮件获取特定用户的所有friends，approved字段为true
在nodejs中，我有用户mongo模式

const UserSchema = mongoose.Schema({
     username : {type: String , required :true},
     email : {type: String , required :true, unique: true, match: /.+\@.+\..+/},
     password : {type: String , required :true},
     friends : {type:[{username : String, approved: Boolean}]},
});

[
  {
    "username": "ali",
    "email": "ali200@gmail,com",
    "password": "pdcjjfefmkadjakefkeofjafjafsfjsalnnryifajs",
    "friends": [
      {
        "id": "1",
        "username": "gamal",
        "approved": true
      },
      {
        "id": "2",
        "username": "osama",
        "approved": false
      },
      {
        "id": "3",
        "username": "john",
        "approved": true
      }
    ]
  }
]

我需要得到friends对象的数组，approved字段是true，如下所示

[
     {
        "id": "1",
        "username": "gamal",
        "approved": true
      },
      {
        "id": "3",
        "username": "john",
        "approved": true
      }

]

注解中的代码：

router.get("/getFriends", (req, res) => {
      var email = getEmailFromToken(req.header("Authorization"));
      User.findOne({
        email: email
      }).then((user) => res.status(200).send({
        friends: user.friends
      }));