You can conditionlly eagerload relationships in graphql-ruby by looking at look aheads:
module Resolvers
class Customer < Resolvers::BaseResolver
extras [:lookahead]
argument :id, ID, required: true
def resolve(lookahead:, id:)
scope = ::Customer
if lookahead.selects?(:orders)
scope = scope.includes(:orders)
end
scope.find_by(id)
end
end
end