How to Effectively Use MySQL Transactions in Multiple Related Functions with mysql2/promise

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The Problem: Handling Transactions Across Functions

Here's what happens in the current code:

This leads to isUserId returning false unexpectedly, which disrupts the transaction flow.

The Solution: Centralizing Database Operations with a Class

To resolve the issue, we need to create a centralized database class that manages the connection and query execution. This ensures that all operations are performed over the same connection for the duration of the transaction. Let's break down the solution into structured steps:

Step 1: Create a Database Class

We'll build a DB class that handles all database connections:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Update User Validation Logic

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Step 3: Implement Registration Logic

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

This approach not only simplifies your database queries but also enhances code readability and maintainability. With mysql2/promise at your disposal, implementing best practices for database transactions becomes exceedingly straightforward.