Скачать или смотреть Solving the NestJS, PostgreSQL, and TypeORM Migration Issue: A Simple Fix

Discover how to troubleshoot and resolve the common issue of migrations not running properly in NestJS with PostgreSQL and TypeORM. Find out the solution to ensure your database migrations execute as expected.
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This video is based on the question https://stackoverflow.com/q/63584034/ asked by the user 'Felipe Calderano' ( https://stackoverflow.com/u/5852962/ ) and on the answer https://stackoverflow.com/a/63585628/ provided by the user 'Felipe Calderano' ( https://stackoverflow.com/u/5852962/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Navigating the NestJS, PostgreSQL, and TypeORM Migration Issue

When working with NestJS, PostgreSQL, and TypeORM, developers often encounter various roadblocks, particularly with database migrations. A prevalent issue is when migrations do not execute properly, leaving an empty migrations table. This can be frustrating, especially when everything seems to be configured correctly. Let’s dive into this issue and explore how to solve it effectively.

Understanding the Problem

You may find yourself in a situation where you attempt to run TypeORM migrations—in either automatic application startup or manually via the TypeORM CLI—but only the migrations table is created, and it remains empty. This can prevent your application from successfully populating the database as intended. In many cases, the migration files are created correctly, but they fail to execute due to minor configuration errors that can be easy to overlook.

Common Configuration Files You’ll Encounter:

tsconfig.json: This TypeScript configuration file sets the compilation options.

package.json: This file manages your application's dependencies and scripts.

ormconfig.json: This configuration file is crucial for TypeORM and defines how it connects to your database.

Troubleshooting the Migration Execution

To find a solution, we need to thoroughly review these configurations and identify potential issues. Below are steps to troubleshoot the migration execution:

Step 1: Inspect Your Configuration Files

Let’s examine the critical sections of each of your configuration files. Analyzing these can help catch any minor issues.

tsconfig.json

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

Ensure that each option is correctly formatted.

package.json

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

The TypeORM CLI setup should be well-defined; check this line for any issues.

ormconfig.json

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

Look closely at the "migrations " line (notice the extra space) and confirm its accuracy.

Step 2: Identify the Simple Fix

As it happens, the solution can be surprisingly simple. The main culprit in many cases? An extra space in your configuration settings.

In this case, the fix was as simple as correcting the ormconfig.json file:

Original Line:

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

Corrected Line:

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

Step 3: Run Your Migrations Again

Once you’ve made the adjustment, it’s time to run your migrations again. You can do this either through your application startup or via the CLI:

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

If the configuration is correct and the migrations are properly set up, you should see the migration files executing without issues, and your database should populate as needed.

Conclusion

In summary, while configuring NestJS, PostgreSQL, and TypeORM, you might encounter issues with migrations not executing. Oftentimes, a simple typo or formatting error could be the problem. By meticulously checking your configuration files and ensuring everything is formatted correctly—and especially watching out for extra spaces—you'll save yourself from headaches and get your migrations running smoothly!

If you ever face similar issues in the future, remember to keep an eye on those small details; they can make a world of difference.