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The Sneaky PostgreSQL Bug That Cost Me 3 Hours (And How to Fix It in 3 Minutes)

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It Started With a Simple Query… It was a regular Thursday afternoon. I was adding a bulk delete feature to our e-commerce platform when I hit “save” and watched the server restart. Everything compiled fine. The linter was happy. The tests passed. Then I clicked the “Delete Selected” button with no items selected. [15:59:28.503] ERROR: Internal server error DatabaseError: syntax error at or near ")" code: "42601" position: "5490" Syntax error? Near a parenthesis? I checked my SQL query three times. Four times. Copy-pasted it into pgAdmin and ran it manually. It worked perfectly. But in production? It failed every single time. Sound familiar? If you’ve ever seen this cryptic error message while working with PostgreSQL and Node.js, you’re not alone. And I’m about to save you the 3 hours I wasted tracking it down. The Culprit: A Pattern We’ve All Written Here’s what my code looked like: async function deleteProducts(productIds) {  const result = await db.quer...
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 A Complete Guide to Understanding JWT and Implementing It in Your Applications

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JSON Web Tokens (JWT) have become a popular choice for authentication and authorization in web applications due to their compact size, security, and ease of use. In this blog post, we will dive deep into the mechanics of JWT, how it works, and how to implement it securely and effectively. Whether you’re a beginner or an expert, this guide will help you gain a solid understanding of JWT. What is JWT? JWT, short for JSON Web Token , is a compact, URL-safe way of representing claims to be transferred between two parties. These claims are typically used for authentication and authorization, making JWT an essential tool for securing web applications. JWTs are widely used because they: Are self-contained : JWTs include all the information needed to authenticate the user. Are compact and URL-safe : Their structure is small enough to be included in HTTP headers, making them easy to transmit. The Structure of a JWT A JWT is made up of three parts: Header Payload Signature Each of these parts se...
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