Make Get Delete and Put API with mongoose in Nodejs

 

 

  

Make Get Delete and Put API with mongoose in Nodejs

This blog we have seen mongodb basic and how is it work with installation and after installation, we have already seen mongodb basic, CRUD operation, connect mongodb with nodejs, read, update, delete, POST, GET API etc. we should not face any problem while making Database, collection(table) and using the data in nodejs even whenever we will make API. Read data from mongodb in nodejs

• # What is Mongoose
• # Install Mongoose
  
• # Example of GET Method API
  
• # Example of DELETE Method API
  
• # Example of PUT Method API
  

 

Now in this blog  we will use mongoose. There is an npm package to connect nodes to mongodb. Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment. They created mongoose by improving mongodb, with the help of which you can create schemas and models of mongoose's movements.

Suppose that there are 4 fields in our database (like name, brand, price, category) and the user wants to add a 5th field also (like color) but we want to add only 4 fields, for this we create schemas.

Here you can also define TYPE in schemas like price type is numeric but if any user wants to use quotes (" " ' ') then we can stop the user for this.

in sort we can apply validation in mongoose but we can't in directly mongodb.

 

 

 What is MongoDB

 

MongoDB is a popular open-source NoSQL (non-relational) database management system. NoSQL means no structure like it is look like an object while in SQL it is a structure query language like SELECT CustomerName, City FROM Customers; (The SELECT statement is used to select data from a database.) But NoSQL database is useless...NOT completely because of whenever we want add extra column in database then it is possible through NoSQL MongoDB.   

 

MongoDB installation - CLICK HERE

MongoDB Basic Command - CLICK HERE

About MongoDB vs SQL - CLICK HERE

CRUD in MongoDB - CLICK HERE

 

 

Object Like - 

 

 

{
  "_id": {
    "$oid": "659ad46e0382148123c82841"
  },
  "name": "moto G60",
  "brand": "motorola",
  "price": 16500,
  "category": "mobile"
}

 

 

MongoDB is a type of database that helps store and manage large amounts of data in a flexible and scalable way. Unlike SQL, MongoDB doesn't require a fixed structure for the data, allowing you to store information in a more versatile format.

• MongoDB is a NoSQL database.
• The data stored in a collection
• Collection don't have row and columns
• Data is stored in the form of object.

Install Mongoose

For this you need to copy this (npm i mongoose) and paste it in project's terminal.

https://www.npmjs.com/package/mongoose

 

 

 

 

 CLICK HERE FOR POST METHOD - POST WITH MONGOOSE

Example of GET Method API

 

Here, we gonna write the code of get method with mongoose, you can also check the post method with mongoose. simple endpoint is our /list and we will promises (async and await). 

 

 

app.get('/list', async (req, resp) => {
   let data  = await Product.find();
   resp.send(data)
})

 

 

 if we run this code with the help of nodemon index.js or node index.js you can see this.

 

 Example of DELETE Method API

 

 Now we are using delete method and inside the parameter we send the ID and through this ID we will delete the data from database.

Here we first simple console.log(done) checking for delete method is working or not.

app.delete('/delete/:id', async (req, resp) =>{
   console.log(req.params);

   resp.send("Done")
})

 

 

app.delete('/delete/:_id', async (req, resp) =>{
   console.log(req.params);
   let data = await Product.deleteOne({id : 
   req.params})
   resp.send(data)
})

 

 

 Here we breakdown the code and /delete/:_id this _id we will get from mongoDB dont worry i will showing you and we will use deleteOne method because of we  want to delete the only one data from id number and we will get id from parameters.

 Here, is acknowledged is true thats mean data is deleted.

 

 Example of PUT Method API

 

With the PUT Method you can change the data means update the data through the _id, name whatever you want but mostly we will delete by _id.

 

 

app.put("/update/:_id", async (req, resp) => {
   console.log(req.params)
   let data = await Product.updateOne(
       req.params, //it is condition 
      {
         $set : req.body
      }
      );
      resp.send(data)
})

 

 updateOne method and req.params (it is condition ) and second one $set is represent what do you want to update. so in postman we will update the price of id.

 

 

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