Amplify-js: How to access AppSync (Amplify graphql API) enum values

[kwhitejr]

* Which Category is your question related to? *
API

* What AWS Services are you utilizing? *
Appsync via Amplify

* Provide additional details e.g. code snippets *
I want to access possible enum values in order to programmatically generate React components, e.g. a dropdown input with option tags. What is the advised way of accessing and/or exposing enums via Appsync? Access to the enums is not included in the generated code.

[jordanranz]

Hey @kwhitejr,

There are two ways to do this:

1. Through aws cli: https://docs.aws.amazon.com/cli/latest/reference/appsync/get-introspection-schema.html
2. Creating an introspection query in your Appsync api: https://graphql.org/learn/introspection/
   example: https://github.com/graphql/graphql-js/blob/master/src/utilities/introspectionQuery.js#L20

I believe your use case calls for option 2.

[kwhitejr]

On advice from @jordanranz and some more research into graphql introspection, I was able to get at my enums with this query:

export const listEnumValues = `query ListEnumValues($enum: String!) {
  enum: __type(name: $enum) {
    enumValues {
      name
    }
  }
}`;