Error Handling and Uniform Messaging

[eslingerbryan]

GraphQL error handling has a few basic details spelled out very clearly, particularly around errors from the type system. But runtime errors encountered during query execution can be a little murkier and lead to lots of questions around how to handle partial failures. The spec has a basic structure for error handling, but leaves lots of room for interpretation in terms of what types of errors actually present themselves in a production setting.

https://spec.graphql.org/June2018/#sec-Errors-and-Non-Nullability