Node.js 无法从学生模型记录类模型数据

Question

我在这里遇到了问题。我目前正在使用 node.js 和 MongoDB 创建学校目录。我在 app.post 请求中，由于某种原因，我无法获取链接到学生的班级名称以登录控制台，但 createdClass.name 将打印...

这里是代码...

app.post("/students/:id", function(req, res){
   Student.findById(req.params.id, function(err, foundStudent){
       if(err){
           console.log(err);
       } else {
          Class.create(req.body.class, function(err, createdClass){
              if(err){
                  console.log(err);
              } else {
                  createdClass.student.id = foundStudent._id;
                  createdClass.student.name = foundStudent.name;
                  console.log(createdClass);
                  createdClass.save();

                  foundStudent.classes.push(createdClass);
                  console.log(foundStudent.classes[0].name);
                  foundStudent.save();
              }
          });
       }
   });
   res.redirect("/students/" + req.params.id);
});

还有，这是我的模型...

学生：

var mongoose = require("mongoose");

var studentSchema = new mongoose.Schema (
    {
        name: String,
        classes: [
                {
                    type: mongoose.Schema.Types.ObjectId,
                    ref: "Class"
                }
            ],
        grades: Array
    }
);

module.exports = mongoose.model("Student", studentSchema);

类：

var mongoose = require("mongoose");

var classSchema = new mongoose.Schema (
    {
        name: String,
        student: 
        {
            id: 
            {
                type: mongoose.Schema.Types.ObjectId,
                ref: "Student"
            },
            name: String
        }
    }
);

module.exports = mongoose.model("Class", classSchema);

提前感谢您，如果有什么我可以添加以使本文更易于阅读，请告诉我。

这是发出帖子请求的页面...

<div>
    <h1>Student Profile</h1>
    <h2>Name: <%=student.name%></h2>
    <div>
        <h3>Classes:
            <form action="/students/<%= student._id %>" method="POST">
                <%if(student.classes.length === 0){%>
                    <p>No classes linked to profile, please add class..</p>
                    <input type="text" name="class[name]" placeholder="Class name">
                <% } else { %>
                    <% student.classes.forEach(function(course){ %>
                        <li><%= course.name %></li>
                    <% }); %>
                <% } %>
            </form>
        </h3>
    </div>
</div>

Answer 1

类是保留字，不能用于变量