I have my SQL Server database - how should I use model query instead of raw query in node js express framework. Is there any way that we can create models for the tables and fetch the result?
ORMs or Object Relational Models are used to interact and perform CRUD operations on a DB server without writing out raw query.
Sequelize is a pretty good ORM for SQL databases in node.js
Read the documentation or checkout a video on youtube on how to create models in Sequelize
Official Website:
https://sequelize.org/
NPM page:
https://www.npmjs.com/package/sequelize
Related
I am already using Prisma as an ORM for a Postgres DB. I need to run a simple raw query on a SQL Server DB. I do not need to use any of the ORM features like the Prisma schema, migrations, etc. Is it possible to do with Prisma? I am trying to minimize dependencies.
Look at this part of the documentation and see if it meets your request.
https://www.prisma.io/client
prima raw query
You would need to create two PrismaClient Instances, one for the PostgresDB and other for SQL Server.
Here's a GitHub Issue on how you can implement it: #2443
I'm trying to make an application with node.js and sequelize ORM. I learnt about the function Sequelize.sync() to update database schema based on the app model.
Is there a way to log the SQL statements that Sequelize.sync() would run without executing them?
I'm used to Doctrine ORM where such a thing is possible and quite convenient (it allows to double-check your model before actually persisting it to the DB).
Is there a way to do it with sequelize too?
Thanks
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.
I have a functioning node.js application with logs data to a mysql database. (without using knex.js)
Now, I want to add functionality to query into my database tables. My question is do I now need knex.js? Is it possible to execute queries without knex?
I could not clearly find examples of this.
From the main Bookshelf page:
Bookshelf is a JavaScript ORM for Node.js, built on the Knex SQL query builder. Featuring both promise based and traditional callback interfaces, it follows the Model & Collection patterns seen in Backbone.js, providing transaction support, eager/nested-eager relation loading, polymorphic associations, and support for one-to-one, one-to-many, and many-to-many relations.
Bookshelf requires a knex connection to operate. You cannot (nor should you) use Bookshelf without Knex.