overwriteModelError:编译后不能覆盖“teams”模型

几个小时后。StackOverflow的研究。关于这个问题有很多文章。但我不知道我在这里出了什么问题。

我的代码:

模型/团队

const mongoose = require('mongoose');

const { Schema } = mongoose;

const teamSchema = new Schema({
  name: { type: String, minLength: 1, required: true },
  description: { type: String },
});

mongoose.model('teams', teamSchema);

型号/部门.js

const mongoose = require('mongoose');

const { Schema } = mongoose;

const divisionSchema = new Schema({
  name: { type: String, minLength: 1, required: true },
  description: { type: String },
});

mongoose.model('teams', divisionSchema);

我被要求进入index.js

const express = require('express');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');
const keys = require('./config/keys');

require('./models/Team');
require('./models/Division');

mongoose.Promise = global.Promise;
mongoose.connect(keys.mongoURI, { useNewUrlParser: true });

const app = express();
app.use(bodyParser.json());

require('./routes/teamRoutes')(app);

const port = process.env.PORT || 5000;
app.listen(port);

路由/团队路由.js

const mongoose = require('mongoose');

const Team = mongoose.model('teams');

module.exports = (app) => {
  app.get('/api/teams', async (req, res) => {
    const teamsList = await Team.find({});
    res.send(teamsList);
  });
};

如果我删除 require('./models/Division'); 这是有效的。为什么会这样? 如果没有,我得到错误:

throw new mongoose.Error.OverwriteModelError(name);
  ^
OverwriteModelError: Cannot overwrite `teams` model once compiled.