express中MongoDB查询问题

Z时代
2024-01-10
分类：IT

最近刚开始学express，在敲mdn的实践，想要小修改一下，遇上一点问题，先上代码：

//tagController.js： const Tag = require('../models/tag'); exports.find_all = async (req, res, next) => { let result = await Tag.find({}); debugger; res.send(result);

};

///./models/tag
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const ObjectId = Schema.ObjectId;
var TagSchema = new Schema({
    context: String,
    tagId: ObjectId
    //tagId: {type: ObjectId, ref: 'Tag', required: true},
});
TagSchema
    .virtual('url')
    .get(function () {
        return '/tag/' + this._id;
    });module.exports = mongoose.model('Tag', TagSchema, 'Tag');

//routes.js
const  express = require('express');
const  router = express.Router();
const tag_controller = require('../controllers/tagController');router.get('/', tag_controller.find_all);

//Set up mongoose connection
var mongoose = require('mongoose');
var mongoDB = 'mongodb://****************************/test?ssl=true&replicaSet=piggybank-shard-0&authSource=admin&retryWrites=true';
const options = {
    useNewUrlParser: true,
    useCreateIndex: true,
    useFindAndModify: false,
    autoIndex: false, // Don't build indexes
    reconnectTries: Number.MAX_VALUE, // Never stop trying to reconnect
    reconnectInterval: 500, // Reconnect every 500ms
    poolSize: 10, // Maintain up to 10 socket connections
    // If not connected, return errors immediately rather than waiting for reconnect
    bufferMaxEntries: 0,
    connectTimeoutMS: 10000, // Give up initial connection after 10 seconds
    socketTimeoutMS: 45000, // Close sockets after 45 seconds of inactivity
    family: 4 // Use IPv4, skip trying IPv6
    // replicaSet: 'piggybank-shard-0',
    // ssl: true,
    // authSource: admin,
    // retryWrites: true
};
mongoose.connect(mongoDB,options);
mongoose.Promise = global.Promise;
var db = mongoose.connection;db.on('error', console.error.bind(console, 'MongoDB connection error:'));