How does fetching records from mongoose find() and updating records with updateOne work exactly.
I am unable to find it on social media..
When a GET request arrived to route handler. Will data fetch from db and maps to schema or will it get records directly from db?
Please explain the proper workflow. What happen when request arrives and how the mapping from db to schema works in CRUD?
Making the assumption that you are also using a framework like expressjs, a GET request does not go directly to mongodb
within a framework like express, you write a handler to handle GET/POST/PATCH/DELETE/PUT etc. within each of those routes you would write your code to interact with mongoose (mongodb)
for reference here is a
basic entry level NODEJS app
Related
I have a backend application built with node.js. Every time there is a change in the database I want to reflect it in my ReactJs interface. (Like listing products or updating posts). I use mongodb as database and mongoose as ORM. How can I do that?
You need to use something that's call WebHook. Webhook Article
I have created a NodeJS project where I have saved the data in a file data.js. It is saved in a server in a local host and I can use it as an API call.
Now I would like to convert this project using MongoDB as the backend to make it more dynamic. I have fetched data using React Hooks in the HomeScreen Page.
Do I need to change the React Hook and Fetching data(axios) Code??
You do not need to change your React code if you ensure your Nodejs API still provides same data in same format as before. Just need to update backend nodejs code to store and fetch details from mongodb instead of the data.js file.
Just Use MongoDB Queries to fetch details and send it in the response like as you were sending before from data.js. The difference would be now is you will be storing your data in MongoDB collections and read it from collections according to your requirements.
How do you get data from firestore using reactjs hooks?
I am working on an app where firestore is used as a database, so I have to fetch inserted data on an insert query using hooks in reactjs.
How can this be done?
Take a look on useEffect() hook. This hook is used for making asynchronous calls. So, you have to put the fetch inside this hook.
I am creating a progressive web app that that is using NodeJS and Express as backend, MongoDB as server, and IndexedDB for storing data locally when offline.
Currently I have defined some Mongoose schema models, and my application is suppose to fetch the data from my MongoDB server and store it into my local IndexedDB when the application goes online. Is it possible to make my IndexedDB's indexes follow the format of my Mongoose schema models, so that if I made some changes to the models, the IndexedDB's indexes will follow the changes as well.
The question is not so clear, an example would have help. But from what I understand, you want to be able to change the schema in MongoDB without breaking the documents saved in IndexedDB and you don't want to update the schema in IndexedDB each time you change the schema in MongoDB. You could use PouchDB which can use IndexedDB behind the scene and it would you to match the same schema as in your MongoDB. PouchDB integrates very well with MongoDB. Thus, if you model changes in MongoDB, when the document is eventually saved on PouchDB (IndexedDB), the document would have the same schema! For your info, PouchDB is the equivalent of MongoDB but in a browser.
I am using mongo database with mongoose (ORM). I have a database that is working well with Express framework Application. Now I want to connect to this database with another Express Application.
Now here is the question,
should I make all mongoose models again in new project with Mongoose ? if not then what will be best option for this that we can use still use existing database mongoose.
I am assuming you are not serving the data via a REST API then. If you create a REST API for the mongoose models and then serve that data through URL's you won't have to create new models, rather you could just request the data via HTTP through GET, POST, DELETE, etc requests from the new express application.
If you want me to elaborate further, I can certainty do so.