Скачать или смотреть Excluding Properties from create() in Sequelize: A Clear Solution

Learn how to exclude unwanted properties when using Sequelize's `create()` method by utilizing a custom `toCleanJson()` function, ensuring a cleaner and more secure data model.
---
This video is based on the question https://stackoverflow.com/q/63787360/ asked by the user 'veroneseComS' ( https://stackoverflow.com/u/8903052/ ) and on the answer https://stackoverflow.com/a/63787529/ provided by the user 'Edward Romero' ( https://stackoverflow.com/u/14167216/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: There's a way to exclude properties from returned create() object?

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Excluding Properties from create() in Sequelize: A Clear Solution

In the world of database management with Node.js and Sequelize, it's common to encounter scenarios where you need to hide specific fields from the response of a model's create() method. This is particularly important for sensitive data fields such as passwords or tokens. In this post, we will provide an in-depth look at how to effectively manage this with custom methods, specifically focusing on the toJSON() function.

The Problem: Unwanted Properties in Response

When using the Model.create() method in Sequelize, you might find that certain properties are still being returned, even after attempting to exclude them using a defaultScope. This can lead to potential security issues, especially if sensitive information like passwords or tokens are involved.

Example Structure:

Consider the following code snippet where the User model is defined:

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

Upon using the create() method, you may still notice that excluded fields are being returned in the response, as illustrated below:

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

The Solution: Custom toCleanJson() Method

Since Sequelize lacks a built-in parameter to manage this directly (unless you are working with PostgreSQL), one effective solution is to overload the toJSON() function. By adjusting this function, we can create a new toCleanJson() function that filters out the unwanted properties from the response object.

Step-by-Step Implementation

Define the keys to be excluded: Identify which properties you would like to omit.

Override the toJSON() or create toCleanJson(): This function will generate a JSON representation of the model and filter out the keys specified.

Here’s how you can implement this:

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

Making it Flexible

For a more dynamic approach, you could modify the function to accept an array of keys to be excluded. This makes your implementation reusable across different models or configurations:

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

Usage

After implementing the above method, you can call toCleanJson() on your model instance instead of the regular toJSON() method, ensuring a cleaner output:

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

Conclusion

By implementing a custom toCleanJson() method within your Sequelize model, you can manage the exposure of sensitive information returned by the create() function. This approach not only keeps your data secure but also respects the DRY (Don't Repeat Yourself) principle, making your code cleaner and more maintainable.

With this solution, you can look forward to maintaining a robust and secure data management strategy in your applications. If you have any questions or need further assistance, feel free to reach out or comment below!