Custom Error Handling in GraphQL — with examples

Error handling is a critical aspect of building robust and reliable GraphQL APIs. As developers, we need to ensure that error responses are informative, consistent, and easy to handle on the client side.

In this article, we will explore advanced error-handling techniques in GraphQL. By leveraging these techniques, you can enhance user experience, provide meaningful error messages, and improve debugging.

We will use GraphQLError class of GraphQL to play with errors.

By customizing error messages, implementing validation rules, and centralizing error-handling logic, you can provide informative and consistent error responses.

Plus, advanced error-handling techniques allow you to catch and handle errors in nested resolvers and test different error scenarios.

Table of contents

• GraphQLError

• Customizing Errors

• Custom error interface

• Global Error Handling

• Error Bubbling and Error Handling in Nested Resolvers

• Conclusion

This post shows you the basics of error handling in GraphQL using GraphQLError class. Using this, we can easily customize errors whether it's database, validations, or any other errors.

For detailed explanations with examples, check out our Canopas Blog.