Module: GraphQL::Relay::ConnectionType

Defined in:
lib/graphql/relay/connection_type.rb

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.bidirectional_pagination ⇒ Boolean

Returns If true, connections check for reverse-direction has*Page values.

Returns:

  • (Boolean) —

    If true, connections check for reverse-direction has*Page values



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# File 'lib/graphql/relay/connection_type.rb', line 9

def bidirectional_pagination
  @bidirectional_pagination
end

.default_nodes_field ⇒ Boolean

Returns If true, connection types get a nodes shortcut field.

Returns:

  • (Boolean) —

    If true, connection types get a nodes shortcut field



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# File 'lib/graphql/relay/connection_type.rb', line 7

def default_nodes_field
  @default_nodes_field
end

Class Method Details

.create_type(wrapped_type, edge_type: nil, edge_class: GraphQL::Relay::Edge, nodes_field: ConnectionType.default_nodes_field, &block) ⇒ Object

Create a connection which exposes edges of this type



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# File 'lib/graphql/relay/connection_type.rb', line 16

def self.create_type(wrapped_type, edge_type: nil, edge_class: GraphQL::Relay::Edge, nodes_field: ConnectionType.default_nodes_field, &block)
  custom_edge_class = edge_class

  # Any call that would trigger `wrapped_type.ensure_defined`
  # must be inside this lazy block, otherwise we get weird
  # cyclical dependency errors :S
  ObjectType.define do
    type_name = wrapped_type.is_a?(GraphQL::BaseType) ? wrapped_type.name : wrapped_type.graphql_name
    edge_type ||= wrapped_type.edge_type
    name("#{type_name}Connection")
    description("The connection type for #{type_name}.")
    field :edges, types[edge_type], "A list of edges.", edge_class: custom_edge_class, property: :edge_nodes

    if nodes_field
      field :nodes, types[wrapped_type],  "A list of nodes.", property: :edge_nodes
    end

    field :pageInfo, !PageInfo, "Information to aid in pagination.", property: :page_info
    relay_node_type(wrapped_type)
    block && instance_eval(&block)
  end
end