AWS JavaScript NestJS TypeScript
There is quite a bit more to Amazon S3 than storing public files. In this article, we look into how we can manage private files. To do so, we learn how to set up a proper private Amazon S3 bucket and how to upload and access files. We use streams and generate presigned URLs with […]
We can find some searching functionalities in a lot of web applications. While we might be fine when iterating through a small data set, the performance for more extensive databases can become an issue. Relational databases might prove to be relatively slow when searching through a lot of data. A solution to the above problem […]
In the third part of this series, we’ve implemented authentication with JWT, Passport, cookies, and bcrypt. It leaves quite a bit of room for improvement. In this article, we look into refresh tokens. You can find all of the code from this series in this repository Why do we need refresh tokens? So far, we’ve implemented JWT […]
As our system grows, certain queries on our database might fail us in terms of performance. One of the popular ways of dealing with this issue are indexes. This article explores how we can use them both through TypeORM and writing our own Postgres queries. Introduction to indexes When we store information on a disk, […]
One of the important concepts to understand when dealing with databases is a transaction. It is a unit of work that we treat as a whole. It either happens fully or not happens at all. To emphasize the importance of transactions, let’s use an example that makes the data loss especially painful. When transferring money […]
JavaScript NestJS SQL TypeScript
Storing arrays is not an obvious thing in the world of SQL databases. Solutions such as MySQL, MariaDB, or Microsoft SQL Server don’t have a straightforward column type for arrays. This article explores how the array data type works in PostgreSQL both through SQL queries and through TypeORM. By learning how to operate on arrays […]
As our database grows, so do the results of our queries. Returning a lot of data in our API might not be the best approach performance-wise. Dividing our content into multiple pages and solutions like infinite scrolling have been around for quite some time. In this article, we explore ways of implementing pagination and point […]
As our application grows, maintaining it might become more challenging. One of the approaches that we can take is to structure our app with microservices. You can find the code for the microservice we create in this article in this repository. The rest of the code can still be found in the repository of our […]
JavaScript NestJS TypeScript Uncategorized
NestJS subscribes to the idea that a microservice is an application that uses a different transport layer than HTTP. Therefore, in the previous part of this series, we’ve used TCP. However, with NestJS, we have a broad selection of transporters that transmit messages across microservices. Each one of them is different, and it is worth exploring […]
With NestJS, we have quite a few transport layer implementations prepared for microservices. Among them, the gRPC transporter is definitely one of the most interesting. In this article, we explore the idea and implement it with NestJS. gRPC is, at its core, a Remote Procedure Call (RPC) framework. Its main idea revolves around creating services […]
