小编Nak*_*ena的帖子

我当前的文档如下所示：

{
    "assignmentName": "OS Assignment-2",
    "dueDate": "10 August",
    "createdAt": "2020-08-02T20:27:28.916Z",
    "maxMarks": 10,
    "facutyName": "Dr. Muskan Gupta",
    "semester": "3",
    "submittedBy": [
        {
            "studentName": "Test name",
            "downloadUrl": "URL"
        },
        {
            "downloadUrl": "URL3",
            "studentName": "Test name2"
        },
        {
            "downloadUrl": "https://downloadthisfile.com",
            "studentName": "Nakshatra Saxena"
        },
        {
            "studentName": "Hello Bortehr",
            "downloadUrl": "httpsav"
        }
    ],
    "program": "CSE",
    "subject": "Operating System with UNIX"
}

我想在“submittedBy”字段中推送一个对象，但出现错误。我现在使用的代码是：

const submittedAssignment = {
    studentName: req.body.studentName,
    downloadUrl: req.body.downloadUrl,
    };
    admin
        .firestore()
        .collection("assignments")
        .doc(req.params.assignmentId)
        .update({
          submittedBy: firebase.firestore.FieldValue.arrayUnion(submittedAssignment)
        });
    })
    .then(() => {
      return …