Module: ElasticGraph::Apollo::SchemaDefinition::ApolloDirectives::Requires

Included in:
FieldExtension
Defined in:
lib/elastic_graph/apollo/schema_definition/apollo_directives.rb

Overview

Supports Apollo’s [‘@requires` directive](www.apollographql.com/docs/federation/federated-types/federated-directives/#requires).

Instance Method Summary collapse

Instance Method Details

#apollo_requires(fields:) ⇒ void

This method returns an undefined value.

Adds the [‘@requires` directive](www.apollographql.com/docs/federation/federated-types/federated-directives/#requires) to the schema element.

Examples:

Add ‘@requires` to a field

ElasticGraph.define_schema do |schema|
  schema.object_type "Product" do |t|
    t.field "size", "Int"
    t.field "weight", "Int"
    t.field "shippingEstimate", "String" do |f|
      f.apollo_requires fields: "size weight"
    end
  end
end

Parameters:

  • fields (String) —

    A GraphQL selection set (provided as a string) of object fields and subfields that the subgraph can resolve only at this query path.



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# File 'lib/elastic_graph/apollo/schema_definition/apollo_directives.rb', line 220

def apollo_requires(fields:)
  directive "requires", fields: fields
end