Obtaining field directives at execution time

[Hellzed]

Given the following SDL example:

directive @example(
  arg: String
) on FIELD_DEFINITION

type Query {
  field: String @example(arg: "some value")
}

At execution time (I'm assuming from within a resolver or middleware), when resolving field, what would be the proper way to know the example directive is applied to it, and to get "some value"?

I've checked the doc and found graphql.get_directive_values() but can't figure how to use it.
GraphQLResolveInfo.field_nodes is a list with only one field node, which has an empty directives property.

I know providing a framework to define directives is not a goal of this lib, but I just need a bare bones way to access this data.

Edit:
After checking the internals, I get it better: GraphQLResolveInfo.field_nodes gives access to the selection nodes, and these only carry client query directives.

To access the field definition within the server schema, I have to do the following:

field_def = info.parent_type.fields[info.field_name]
directive = info.schema.get_directive("example")
graphql.get_directive_values(directive, field_def)  # {"arg": "some value"}

Let me know if I'm doing something wrong! (and feel free to close this issue. I feel like having some doc about it might make sense.)

[Cito]

Sorry for the later answer - I thought I had posted one already. You already found the solution - the info object gives you access to the query AST, not the schema AST. You solution should work, except that you need to pass field_def.ast_node instead of field_def to get_directive_values. Maybe you can advocate graphql/graphql-js#1789 if you think that would be helpful. I prefer getting new features into GraphQL-core via GraphQL.js.