Module: GraphQL::Rails::Schema

Extended by:
Schema
Included in:
Schema
Defined in:
lib/graphql/rails/schema.rb

Overview

Defines the GraphQL schema, consisting of queries, mutations, and subscriptions.

Constant Summary collapse

TYPES = 
[:query, :mutation, :subscription]

Instance Method Summary collapse

Instance Method Details

#clear ⇒ Object

Clear internal state, probably due to a Rails reload.



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# File 'lib/graphql/rails/schema.rb', line 9

def clear
  @schema = nil
  @fields = Hash.new { |hash, key| hash[key] = [] }
end

#instance ⇒ Object

Lazily build the GraphQL schema instance.



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# File 'lib/graphql/rails/schema.rb', line 25

def instance
  @schema ||= GraphQL::Schema.new begin
    TYPES.reduce({
      max_depth: Rails.config.max_depth,
      types: Types.explicit,
    }) do |schema, type|
      fields = @fields[type]
      unless fields.empty?
        # Build an object for each operation type.
        schema[type] = GraphQL::ObjectType.define do
          name type.to_s.capitalize
          description "Root #{type.to_s} for this schema"
          # Add a field for each operation.
          fields.each do |value|
            field value.name, field: value
          end
          # Add the global node ID lookup query.
          if Rails.config.global_ids && type == :query
            field :node, field: NodeIdentification.field
          end
        end
      end
      schema
    end
  end
end