node.js - 如何使用mongoose连接数据库中已经存在的一个集合。

Answer 1

If you want to use mongooes to connect to an existing data collection in the mongo database, you need to add a parameter {collection: "collection name"} when defining the schema. The collection name here is an existing collection in the database. As follows:

The definition of the model is the same as before:

The third parameter here is to solve the problem that the collection name in the database will automatically become plural

Answer 2

mongoose reads data from the database, no need for mongoose.collection('collectionName').
For complete learning, refer to the mongoose documentation. A simple example is as follows, where {} is specific conditions or data.
-- model.js --

const mongoose = require('mongoose');
mongoose.connect('mongodb://locahost/dbName')
const dataSchema = new mongoose.Schema({});
const dataModel = mongoose.model('modelName', dataSchema, 'collectionName');
module.exports = dataModel;

-- CRUD data --

let dataModel = require('./model.js');
dataModel.create({}, cb);
dataModel.find({}, cb);
dataModel.update({}, {}, cb);
dataModel.remove({}, cb);

soonfy

Answer 3

Please refer to the relevant chapters of Mongoose’s documentation:

http://mongoosejs.com/docs/qu...

For reference.

Love MongoDB! Have Fun!