如何使用 Mongoose 在 JsonArray 中获取 json 对象答案

【问题标题】：How to get an json object in JsonArray using Mongoose如何使用 Mongoose 在 JsonArray 中获取 json 对象
【发布时间】：2016-09-01 06:40:54
【问题描述】：

我正在尝试使用以下代码更新数组中的 json 对象。该代码似乎在数组中找到 json 对象，但是，它无法更新 json 数组中的 json 对象。它没有给出任何错误，这就是让它更加混乱的原因。

function addOrUpdateAppointment(jsonObject, isDatabaseOperationSuccessful) {
    var docID = jsonObject.doctorID; // this is _id from db sent to the doctor upon logging in
    console.log("jsonPssed: ", {_id : docID});
    DoctorModel.findOne({_id : docID, 'appointmentList.patientID': jsonObject.appointment.patientID}, {'appointmentList.$.patientID': jsonObject.appointment.patientID},function(err, foundData) {
        console.log("found data", foundData);
        if(err) {
            console.error("error in find doctor for adding the appointment", err);
            isDatabaseOperationSuccessful(false, foundData);
            return;
        }
        else {
            // since no document matched your query, add the appointment
            if (!foundData) {
                DoctorModel.update(
                    {_id: docID},
                    {$push: {appointmentList: jsonObject.appointment}},
                    function(err, pushedData) {
                        if(err) {
                            console.error("error in adding", err);
                            isDatabaseOperationSuccessful(false, pushedData);
                        }
                        else {
                            console.log("adding successful", pushedData, "inserted: ", jsonObject.appointment);
                            isDatabaseOperationSuccessful(true, pushedData);
                        }
                    }
                );
            }
            // since that appointment already exists, update it
            else {
                foundData.update({'_id':docID,'doctors.appointmentList.patientID' : jsonObject.appointment.patientID}, {$set: {'doctors.appointmentList.$.dateAndTime': jsonObject.appointment.dateAndTime}},
                    function(err, updatedData) {
                        if (err) {
                            console.error("error in updating", err);
                            isDatabaseOperationSuccessful(false, foundData);
                        }
                        else {
                            if (!updatedData) {
                                console.log("updating failed", updatedData);
                                isDatabaseOperationSuccessful(true, foundData);
                            }
                            else {
                                console.log("updating successful", updatedData);
                                isDatabaseOperationSuccessful(true, foundData);
                            }
                        }
                    }
                );
            }
        }
    });
}

架构：

doctorSchema = mongoose.Schema({
        name : String,
        appointmentList : Array // array of jsonObjects of dates and time
    });

我传递给 addOrUpdateAppointment() 的数据，

{
    "docID": "id assigned by mongoDB",
    "appointment": {
        "patientID": "id assigned by mongoDB",
        "dataAndTime": "IIII"
    }
}

【问题讨论】：

标签： json node.js mongodb mongoose

【解决方案1】：

您的代码几乎是正确的，只需在您想要更新数据时将foundData 更改为DoctorModel。于是代码变成了：

            else {
DoctorModel.update({'_id':docID, 'appointmentList.patientID' : jsonObject.appointment.patientID}, {$set: {'appointmentList.$': jsonObject.appointment}},
                    function(err, updatedData) {....});

【讨论】：