英文:
Exporting Mongoose connection to a different file
问题
当前文件/文件夹结构：
第1部分 - 创建mongoose连接
路径：myApp/src/db/mongoose.js
import mongoose from "mongoose";mongoose.set("strictQuery", true);mongoose.connect("mongodb://localhost:27017/task-manager-api", { useNewUrlParser: true }, () => {console.log("connected to database");});module.exports = mongoose; // 这是冗余的，没有分配给一个变量
第2部分 - 在运行express的文件中导入它
路径：myapp/index.js
import express from "express";import "./src/db/mongoose";const app = express();const port = 3000;app.use(express.json());app.listen(port, () => {console.log("listening on port 3000");});
错误：
无法找到模块"myApp/src/db/mongoose"，从"myApp/index"导入
这是我尝试过的：
- 我尝试使用const mongoose = require("mongoose")，然后module.exports = mongoose将连接移到index.js文件中，但仍然没有运气。
- 大量搜索谷歌以查找是否在任何地方维护了一个单独的mongoose连接文件。
- 我查找了如何在ES6中使用require模块，但仍然没有运气。
// import { createRequire } from "module";// const require = createRequire(import.meta.url);
任何帮助/建议都将不胜感激。谢谢。
预期输出：
- Mongoose连接导入到index.js中
英文:
Current file/folder structure:
Part 1 - Create a mongoose connection
path: myApp/src/db/mongoose.js
import mongoose from "mongoose";mongoose.set("strictQuery", true);mongoose.connect("mongodb://localhost:27017/task-manager-api", { useNewUrlParser: true }, () => {console.log("connected to database");});module.exports = mongoose; //this is redundant without assigning to a variable
Part 2 - Importing it in a file where I run express
path: myapp/index.js
import express from "express";import "./src/db/mongoose";const app = express();const port = 3000;app.use(express.json());app.listen(port, () => {console.log("listening on port 3000");});
Error:
Cannot find module "myApp/src/db/mongoose" imported from "myApp/index"
Here's what I have tried:
- I tried to use const mongoose = require("mongoose") and then module.exports = mongoose to move the connection to the index.js file but still no luck
- A tonne of google search to find if a separate mongoose connection file is maintained anywhere
- I looked up how to use require module in ES6 but still no luck
// import { createRequire } from "module";// const require = createRequire(import.meta.url);
Any help/advice would be highly appreciated. Thank you.
Expected output:
- Mongoose connection imported into index.js
答案1
得分: 1
我会看一下做类似以下操作：
- 将您的 mongoose 连接封装在一个导出的函数中
- 在您的 index.js 中导入 connect 函数并调用它
代码可能会像这样（未经测试！）：
mongoose.js：
export const connect = async () => {await mongoose.connect("mongodb://localhost:27017/task-manager-api", {useNewUrlParser: true});};
index.js：
import express from "express";import { connect } from "<...relevant_path_here...>/mongoose";const app = express();const port = 3000;app.use(express.json());const start = async () => {try {await connect();app.listen(port, () => {console.log("listening on port 3000");});} catch (error) {console.error(error);process.exit(1);}};start();
英文:
I'd look at doing something along the lines of
- wrapping your mongoose connect up in an exported function
- Import the connect function in your index.js and call it
The code may end up looking like this (Not tested!):
mongoose.js:
export const connect = async () => {await mongoose.connect("mongodb://localhost:27017/task-manager-api", {useNewUrlParser: true});};
index.js
import express from "express";import {connect} from "<...relevant_path_here...>/mongoose";const app = express();const port = 3000;app.use(express.json());const start = async () => {try {await connect();app.listen(port, () => {console.log("listening on port 3000");});} catch (error) {console.error(error);process.exit(1);}};start();
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