mongodb - MongoDB：在副本集配置中找不到名为“majority a”的写入关注模式

Question

我正在学习遍历媒体教程，但遇到了一个我不熟悉的错误（在标题中）。我一直在努力了解这一点，但我仍然对它出现的原因以及它的来源感到困惑。此外，我还没有找到与此问题相关的任何直接匹配项。

这是有问题的代码，底部的问题是返回error.message。

编辑：还值得注意的是，我能够成功地将用户添加到我的数据库中。所以，它贯穿整个try街区，但也......catch所以这是一个很大的混乱。我在邮递员上得到的唯一响应是来自该catch块的服务器错误 500 消息。

const express = require('express');
const router = express.Router();
const gravatar = require('gravatar');
const bcrypt = require('bcryptjs');
const { check, validationResult } = require('express-validator');

const User = require('../../models/User');

// @route   GET api/users
// @desc    Test route
// @access  Public
router.post(
  '/',
  [
    check('name', 'Name is required').not().isEmpty(),
    check('email', 'Please include a valid email').isEmail(),
    check(
      'password',
      'Please enter a password with 6 or more characters'
    ).isLength({ min: 6 }),
  ],
  async (req, res) => {
    const errors = validationResult(req);
    if (!errors.isEmpty()) {
      return res.status(400).json({ errors: errors.array() });
    }

    const { name, email, password } = req.body;

    try {
      let user = await User.findOne({ email });
      
      // see if user exists
      if (user) {
        return res.status(400).json({
          errors: [{ msg: 'User already exists' }],
        });
      }

      // get users gravatar
      const avatar = gravatar.url(email, {
        s: '200',
        r: 'pg',
        d: 'mm',
      });

      user = new User({
        name,
        email,
        avatar,
        password,
      });

      // encrypt password
      const salt = await bcrypt.genSalt(10);

      user.password = await bcrypt.hash(password, salt);

      await user.save();

      // return jsonwebtoken
      return res.send('User registered');
    } catch (error) {
      console.log(error.message);
      res.status(500).send('Server error');
    }
  }
);

module.exports = router;

用户模式

const mongoose = require('mongoose');

const UserSchema = new mongoose.Schema({
  name: {
    type: String,
    required: true,
    unique: true,
  },
  email: {
    type: String,
    required: true,
    unique: true,
  },
  password: {
    type: String,
    required: true,
  },
  avatar: {
    type: String,
  },
  date: {
    type: Date,
    default: Date.now,
  },
});

const User = mongoose.model('user', UserSchema);

module.exports = User;

连接配置：

const mongoose = require('mongoose');
const config = require('config');
const db = config.get('mongoURI');

const connectDB = async () => {
  try {
    await mongoose.connect(db, {
      useUnifiedTopology: true,
      useNewUrlParser: true,
      useCreateIndex: true,
    });
    console.log('Connected to MongoDB');
  } catch (err) {
    console.error(err.message);
    process.exit(1);
  }
};

module.exports = connectDB;

标签： mongodbmongoose