CODEWITHSUNDEEP
rubygraphqlapollo-federationgraphql-ruby
pmrotule
pmrotule

Reputation: 9692

How to lookahead from a reference resolver in GraphQL Ruby?

Using lookahead in GraphQL Ruby is really helpful to optimize your database queries, but it seems like you can only use it at the field level. This is fine for normal GraphQL API, but when using Apollo Federation, the entry point is not a query field, it is a reference resolver. Something like the following:

class User < BaseObject
  key fields: :user_id
  field :user_id, ID, null: false
  underscore_reference_keys true

  def self.resolve_reference(reference, _context)
    Loaders::Record.for(User).load(reference[:user_id])
  end
end

So you only have access to the reference (the object sent from the previous subgraph) and the context. Is there any way we can lookahead using the context?

Upvotes: 0

Views: 99

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