Class: GraphQL::Schema::Field::ConnectionExtension

Inherits:
GraphQL::Schema::FieldExtension show all
Defined in:
lib/graphql/schema/field/connection_extension.rb

Instance Attribute Summary

Attributes inherited from GraphQL::Schema::FieldExtension

#field, #options

Instance Method Summary collapse

Methods inherited from GraphQL::Schema::FieldExtension

#initialize

Constructor Details

This class inherits a constructor from GraphQL::Schema::FieldExtension

Instance Method Details

#after_resolve(value:, object:, arguments:, context:, memo:) ⇒ Object 



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# File 'lib/graphql/schema/field/connection_extension.rb', line 24

def after_resolve(value:, object:, arguments:, context:, memo:)
  if value.is_a? GraphQL::ExecutionError
    # This isn't even going to work because context doesn't have ast_node anymore
    context.add_error(value)
    nil
  elsif value.nil?
    nil
  elsif value.is_a?(GraphQL::Pagination::Connection)
    # update the connection with some things that may not have been provided
    value.context ||= context
    value.parent ||= object.object
    value.first_value ||= arguments[:first]
    value.after_value ||= arguments[:after]
    value.last_value ||= arguments[:last]
    value.before_value ||= arguments[:before]
    if field.has_max_page_size? && !value.has_max_page_size_override?
      value.max_page_size = field.max_page_size
    end
    value
  elsif context.schema.new_connections?
    wrappers = context.namespace(:connections)[:all_wrappers] ||= context.schema.connections.all_wrappers
    context.schema.connections.wrap(field, object.object, value, arguments, context, wrappers: wrappers)
  else
    if object.is_a?(GraphQL::Schema::Object)
      object = object.object
    end
    connection_class = GraphQL::Relay::BaseConnection.connection_for_nodes(value)
    connection_class.new(
      value,
      arguments,
      field: field,
      max_page_size: field.max_page_size,
      parent: object,
      context: context,
    )
  end
end

#apply ⇒ Object 



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# File 'lib/graphql/schema/field/connection_extension.rb', line 7

def apply
  field.argument :after, "String", "Returns the elements in the list that come after the specified cursor.", required: false
  field.argument :before, "String", "Returns the elements in the list that come before the specified cursor.", required: false
  field.argument :first, "Int", "Returns the first _n_ elements from the list.", required: false
  field.argument :last, "Int", "Returns the last _n_ elements from the list.", required: false
end

#resolve(object:, arguments:, context:) {|object, next_args| ... } ⇒ Object

Remove pagination args before passing it to a user method

Yields:

  • (object, next_args) 


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# File 'lib/graphql/schema/field/connection_extension.rb', line 15

def resolve(object:, arguments:, context:)
  next_args = arguments.dup
  next_args.delete(:first)
  next_args.delete(:last)
  next_args.delete(:before)
  next_args.delete(:after)
  yield(object, next_args)
end