无法将值推送到 mongoDB 数组

Question

您好，我有一个 MEAN 堆栈应用程序，它使用如下定义的猫鼬模型：

appointment.js

var mongoose = require('mongoose');
module.exports = mongoose.model('Appointment', {
appt_date: String,
details: [ {
            appt_time: String,
            patient_id : String,
            patient_name : String,
            contact_no: String,
            doctor_name : String,
            purpose : String
          }
      ]
});

我想生成如下文档：

{
 appt_date: 13/13/2013,
 details: [
    {
        appt_time: 09:00 AM,
        patient_id: 2015/2016,
        patient_name: David John,
        contact_no: 8965741234,
        doctor_name: Albert ,
        purpose: Consultation,

    }
}

使用以下 Express JS 代码时无法生成文档：

var Appointment = require('../../models/appointment');
var appointments = new Appointment ({ "appt_date" : req.body.date});
appointments.save();
Appointment.update({ appt_date: req.body.date},
{ 
  $push: {
           'details':  {    
                         appt_time:"09:00 AM",
                         patient_id:"2015/2016",
                         patient_name:"Wilfred",
                         contact_no:"8965741234",
                         doctor_name: "Albert",
                         purpose: "Consultation"
                       }
          }
 },
   {
      upsert:true
   });

执行上述操作后，我得到的结果如下：

"_id": ObjectId('57b6eefd2b494e802ba146d8'),
"appt_date": "12/20/2014",
"details": [],
"__v": 0

我无法将任何数据推送到“详细信息”数组。我需要的是单个日期条目（appt_date），多个详细信息（详细信息数组）。请帮忙解决这个问题。

谢谢。

Answer 1

save() 之后无需更新，只需在details 键上使用 push() 方法，然后保存即可。例如：

var Appointment = require('../../models/appointment');
var appointments = new Appointment ({ "appt_date" : req.body.date});
appointments.details.push({    
    appt_time: "09:00 AM",
    patient_id: "2015/2016",
    patient_name: "Wilfred",
    contact_no: "8965741234",
    doctor_name: "Albert",
    purpose: "Consultation"
});
appointments.save(function(err, appointment){
    if (err) handleErr(err);
    console.log(appointment);
});

Answer 2

试试这个代码：

var Appointment = require('../../models/appointment');
var appointments = new Appointment();
appointments.appt_date = req.body.date;
appointment.details.push({appt_time:"09:00 AM",patient_id:"2015/2016", patient_name:"Wilfred",contact_no:"8965741234",doctor_name: "Albert",
purpose: "Consultation"});
appointments.save(function(err){
   if(!err)
      console.log("saved")
})

Answer 3

您正在根据日期更新文档，并且可能有超过 1 个 app_date，这种情况将更新多个文档。，您必须添加 multi : true 对象

Appointment.update({ appt_date: req.body.date},
{ 
 $push: {
       'details':  {    
                     appt_time:"09:00 AM",
                     patient_id:"2015/2016",
                     patient_name:"Wilfred",
                     contact_no:"8965741234",
                     doctor_name: "Albert",
                     purpose: "Consultation"
                   }
      }
},
{multi: true},
 {
  upsert:true
 });

或者你可以通过_id更新它