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๐ก Newskategorie: Programmierung
๐ Quelle: dev.to
In modern web development, creating robust backend services is essential, especially when dealing with dynamic data like todos. In this tutorial, I will build a Todo Application backend using MongoDB as our database and Express.js as our server framework. We'll leverage the Mongoose library to interact with MongoDB in a schema-based manner.
Getting Started
First things first, let's set up our environment. Ensure you have Node.js installed, and then install the necessary dependencies:
npm install express mongoose --save
Connecting to MongoDB
To begin, import the required libraries:
const express = require('express');
const mongoose = require('mongoose');
Next, establish a connection to your MongoDB database:
mongoose.connect('your MongoDB connection string/collection_name');
Defining the Schema
Even though MongoDB is a schema-less database, Mongoose requires us to define a schema before creating models. Let's define our Todo schema:
const todoSchema = mongoose.Schema({
title: String,
description: String,
isComplete: {
type: Boolean,
default: false
}
});
Creating the Model
With the schema in place, let's create a model for our Todo:
const todo = mongosse.model('todo' , todoSchema);
Get all Todos
app.get('/todos', async (req, res) => {
try {
const todos = await Todo.find({});
if (!todos) {
res.status(404).json({ msg: "Data not found" });
} else {
res.json({ todos });
}
} catch (error) {
res.status(500).json({ msg: error });
}
});
Create a new todo:
app.post('/create-todo', async(req, res) =>{
//create the todos
const {title, descrption} = req.body;
try{
await todo.create({
title,
description
})
res.json({
msg :"To do created"
})
}
catch(error){
res.status(411).json({
msg: "Error"
})
}
//write the logic of creating a todo
})
Update a Todo
app.put('/update-todo', async(req,res) =>{
//update the todo
const {id} = req.body;
try{
await todo.updateOne({
_id : id
}, {
isComplate : true
})
res.json({
msg : "Task completed"
})
}
catch(error){
res.status(505).json({
msg : "Server Error"
})
}
})
Conclusion
In this tutorial, we've covered the basics of building a Todo Application backend using MongoDB and Express. We've learned how to define schemas, create models, and implement CRUD operations.
Please see the below Github link for the code:
https://github.com/tirthraval/todo-backend
Happy coding! ๐
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