How I can set custom directives to the current field?

[dmitrydrynov]

Hi guys,
How I can set custom directives to the current field through Javascript code?

I created a custom Directive:

const authDirective = new GraphQLDirective({
    name: 'auth',
    locations: [DirectiveLocation.OBJECT, DirectiveLocation.FIELD_DEFINITION],
    args: ...
})

Added to the schema:

const schema = new GraphQLSchema({
    directives: [authDirective],
    query: new GraphQLObjectType({
        fields: {
            secretData: ...
        }
    })
})

How I can use my directive only for the secretData field?

I tried to add a directives parameter for field definition but it doesn't work:

{
    type: validateWidgetQLType,
    args: validateWidgetQLArgs,
    directives: [
        { name: 'auth', arguments: { requires: 0 }}
    ],
}

Please help!

[IvanGoncharov]

@dmitrydrynov Directives are intended to be used only in GraphQL Documents (SDL or query documents) so if you want to attach some data to a field please use extensions, like so:

const schema = new GraphQLSchema({
  directives: [authDirective],
  query: new GraphQLObjectType({
    fields: {
      secretData: {
        type: validateWidgetQLType,
        args: validateWidgetQLArgs,
        extensions: {
          auth: { requires: 0 }
        }
      }
    }
  })
});

If you need to pass directives to some 3rd-party library please ask them to add support for extensions in addition to directives.