Error Handling in Mutations
A GraphQL query might face some errors during its execution, such as network failures, or server errors, or rate limit errors. To handle these gracefully, we need to ensure that the end user knows that the operation has failed, and we can either retry the operation in the backend, or show the error message in the UI itself so the user itself can retry on the need basis.
Mutation Example –
In the below example query, we have a createUser mutation that is used to create a new user on the server when the query is hit. It accepts the input data, “name” and “email” and uses the data passed in the arguments to create a new entry for the user the server database.
mutation {
createUser(input: { username: "john_doe", email: "john@example.com"}) {
id
username
}
}
Error Handling in Mutations in GraphQL
GraphQL is a powerful open-source query language for APIs. It is known for its flexibility and efficiency in fetching data from server endpoints. GraphQL mutations allow us to update the data in the GraphQL server. Oftentimes, the data update might fail because of several reasons, network failure, retry failure, etc. and so we need some error handling incase of the operation failure to handle it gracefully. In this article, we will explore how we can do error handling in mutations in GraphQL.