Your GraphQL API might return a validation response like this one:

{
  "errors": [
    {
      "message": "Cannot query field \"nam\" on type \"Droid\".",
      "locations": [
        {
          "line": 4,
          "column": 5
        }
      ]
    }
  ]
}

This module defines the GraphQL "error" type, to help parse any validation issues within your Elm application.

Error

Partial errors

It's also possible for your GraphQL response to return partial errors, meaning that both the data fields and the errors field could come back in the same response.

If your application would like to access those partial errors, use either of these two functions:

• GraphQL.Http.expectWithPartialErrors
• GraphQL.Operation.toHttpCmdWithPartialErrors

Note: This will make your Msg result values more complicated:

-- 1️⃣ BEFORE

type Msg
    = ApiResponded (Result GraphQL.Http.Error Data)


-- 2️⃣ AFTER

type Msg
    = ApiResponded
        (Result GraphQL.Http.Error
            { data : Data
            , errors : List Error
            }
        )