Status and Error codes

GraphQL APIs use HTTP status codes to indicate the success or failure of a request. A 200 OK status code means the request was successful. In addition to HTTP status codes, GraphQL APIs also return error objects in response to specific errors.

These error objects have a code and message property. The code is a string that identifies the type of error. For example, you'll receive something like this if you try to request restricted fields without passing the authorization header.

Copy{
    "errors": [
        {
            "message": "You must be authenticated.",
            "locations": [
                {
                    "line": 2,
                    "column": 3
                }
            ],
            "path": ["me"],
            "extensions": {
                "code": "UNAUTHENTICATED"
            }
        }
    ],
    "data": null
}

Some of the error codes are:

1. GRAPHQL_VALIDATION_FAILED

2. UNAUTHENTICATED

3. FORBIDDEN

4. BAD_USER_INPUT

5. NOT_FOUND

You must check for the presence of error objects along with error codes and messages to handle GraphQL errors in a structured way.