React前端调用Node+Mongoose接口报必填字段验证失败Postman正常

React前端向基于Node+Mongoose搭建的后端服务发送POST请求创建反馈数据时，触发Mongoose校验报错；但使用Postman测试同一后端API接口时可正常运行，无校验问题。

报错信息 #

Feedback validation failed: receiver: Path receiver is required., classCodes: Path classCodes is required., level: Path level is required., content: Path content is required.

相关代码 #

后端API控制器代码 #

exports.createFeedback = async (req, res) => {
  try {
    console.log('data from frontend', req.body);
    const feedback = await new FeedbackSchema({
      receiver: req.body.receiver,
      teacher: req.userId,
      classCodes: req.body.classCodes,
      level: req.body.level,
      content: req.body.content,
      send: req.body.send,
    }).save();

    return res.json({ feedback, message: 'Feedback Created' });
  } catch (error) {
    console.log(error.message);
    res.json('Failed to create feedback!');
  }
};

Feedback Schema定义代码 #

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const FeedbackSchema = new Schema({
  receiver: {
    type: Schema.Types.ObjectId,
    ref: 'User',
    required: true,
  },
  teacher: {
    type: Schema.Types.ObjectId,
    ref: 'User',
  },
  level: {
    type: Schema.Types.ObjectId,
    ref: 'Level',
    required: true,
  },
  classCodes: {
    type: Schema.Types.ObjectId,
    ref: 'ClassCode',
    required: true,
  },
  content: {
    type: String,
    required: true,
    maxlength: 300,
  },
  note: {
    type: String,
    maxlength: 300,
  },
  createdAt: {
    type: Date,
    default: Date.now(),
  },
});

module.exports = {
  FeedbackSchema: mongoose.model('Feedback', FeedbackSchema),
};

已完成排查 #

• 前端发送请求前已打印content、level、receiver、classCodes参数，确认值存在
• 后端接口中通过console.log打印req.body，确认已接收到上述字段，但依然触发必填路径验证失败报错

说明：无需关注ratings schema相关内容

现有佐证材料 #

• 后端日志截图
• 前端日志截图
• Postman正常调用截图

内容的提问来源于stack exchange，提问作者Jonh