Node.js 如何在mongodb中保存表单输入数组？

这是我正在使用的表格：

<form method="post" enctype="multipart/form-data">
  <label class="label">Class Name</label>
  <label class="input">
    <input type="text" name="class_name[]">
  </label>
  <label class="label">Grade</label>
  <label class="input">
    <input type="text" name="grade[]">
  </label>
</form>

var SchoolSchema = new mongoose.Schema({
  classroom: [{
    Name: {
      type: String,
      required: true
    },
    grade: {
      type: Number,
      default: 1
    }
  }]
});

首先，我尝试使用以下功能保存数据：

var School = new mongoose.Schema.model('School');

exports.submit = function(req, res) {
  var classRooms = [];
  for (var i = 0; i < req.body.class_name.length; i++) {
    classRooms.push({Name: req.body.class_name[i], grade: req.body.grade[i]});
  }
  School.create({classroom: classRooms}, function(err, school) {
    ...
  });
};

应该是这样的

classroom:[{Name:ABC, Grade:1},{Name: EFG, Grade:2}]

我甚至尝试更改以下功能：

var School = new mongoose.Schema.model('School');

exports.submit = function(req, res) {
  var classRooms = [];
  for (var i = 0; i < req.body.class_name[0].length; i++) {
    classRooms.push({Name: req.body.class_name[0][i], grade: req.body.grade[0][i]});
  }
  School.create({classroom: classRooms}, function(err, school) {
    ...
  });
};

---

请任何人告诉我我做错了什么，以及如何纠正。谢谢

对于单条目和多条目这两种情况，req.body.class_name数据是什么样子的？另外，您是否使用中间件？不，我没有使用任何body解析器。我不明白你的第一个问题。我的意思是，你想知道我输入的数据类型或它是如何表示的吗？我是说，如果你做一个console.log，每个案例的数据格式是什么？bodyParser中间件可能是正确解析的解决方案。

var School = new mongoose.Schema.model('School');

exports.submit = function(req, res) {
  var classRooms = [];
  for (var i = 0; i < req.body.class_name[0].length; i++) {
    classRooms.push({Name: req.body.class_name[0][i], grade: req.body.grade[0][i]});
  }
  School.create({classroom: classRooms}, function(err, school) {
    ...
  });
};

classroom:[{Name:A,Grade:2 },{Name:B,Grade:1}]