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Marius Espejo
Marius Espejo

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TypeORM Tutorial: Migrations, queries, and more! | NestJS

Quite possibly one of the best ORMs you can use with NodeJS (and even more so with NestJS) is TypeORM!

In this video I'll walk you through how to set it up, connect to your database, generate and run migrations for production use, use the Repository API, create custom queries, database relationships, and so much more!

If you're looking to get started with TypeORM to create some CRUD APIs you're on the right post! 🙌

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11 Tips That Make You a Better Typescript Programmer

1 Think in {Set}

Type is an everyday concept to programmers, but it’s surprisingly difficult to define it succinctly. I find it helpful to use Set as a conceptual model instead.

#2 Understand declared type and narrowed type

One extremely powerful typescript feature is automatic type narrowing based on control flow. This means a variable has two types associated with it at any specific point of code location: a declaration type and a narrowed type.

#3 Use discriminated union instead of optional fields


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