Module: GraphQL::Schema::Member::HasArguments Private

Included in:
Directive, Field, InputObject, Resolver
Defined in:
lib/graphql/schema/member/has_arguments.rb

This module is part of a private API. You should avoid using this module if possible, as it may be removed or be changed in the future.

Defined Under Namespace

Modules: ArgumentClassAccessor, ArgumentObjectLoader

Constant Summary collapse

NO_ARGUMENTS =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

{}.freeze

Instance Method Summary collapse

Instance Method Details

#add_argument(arg_defn) ⇒ GraphQL::Schema::Argument

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Register this argument with the class.

Parameters:

Returns:



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# File 'lib/graphql/schema/member/has_arguments.rb', line 79

def add_argument(arg_defn)
  @own_arguments ||= {}
  own_arguments[arg_defn.name] = arg_defn
  arg_defn
end

#argument(*args, **kwargs, &block) ⇒ GraphQL::Schema::Argument

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns An instance of arguments_class, created from *args.

Returns:

See Also:

  • for parameters


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# File 'lib/graphql/schema/member/has_arguments.rb', line 18

def argument(*args, **kwargs, &block)
  kwargs[:owner] = self
  loads = kwargs[:loads]
  if loads
    name = args[0]
    name_as_string = name.to_s

    inferred_arg_name = case name_as_string
    when /_id$/
      name_as_string.sub(/_id$/, "").to_sym
    when /_ids$/
      name_as_string.sub(/_ids$/, "")
        .sub(/([^s])$/, "\\1s")
        .to_sym
    else
      name
    end

    kwargs[:as] ||= inferred_arg_name
  end
  arg_defn = self.argument_class.new(*args, **kwargs, &block)
  add_argument(arg_defn)

  if self.is_a?(Class) && !method_defined?(:"load_#{arg_defn.keyword}")
    method_owner = if self < GraphQL::Schema::InputObject || self < GraphQL::Schema::Directive
      "self."
    elsif self < GraphQL::Schema::Resolver
      ""
    else
      raise "Unexpected argument owner: #{self}"
    end
    if loads && arg_defn.type.list?
      class_eval <<-RUBY, __FILE__, __LINE__ + 1
      def #{method_owner}load_#{arg_defn.keyword}(values, context = nil)
        argument = get_argument("#{arg_defn.graphql_name}")
        (context || self.context).schema.after_lazy(values) do |values2|
          GraphQL::Execution::Lazy.all(values2.map { |value| load_application_object(argument, value, context || self.context) })
        end
      end
      RUBY
    elsif loads
      class_eval <<-RUBY, __FILE__, __LINE__ + 1
      def #{method_owner}load_#{arg_defn.keyword}(value, context = nil)
        argument = get_argument("#{arg_defn.graphql_name}")
        load_application_object(argument, value, context || self.context)
      end
      RUBY
    else
      class_eval <<-RUBY, __FILE__, __LINE__ + 1
      def #{method_owner}load_#{arg_defn.keyword}(value, _context = nil)
        value
      end
      RUBY
    end
  end
  arg_defn
end

#argument_class(new_arg_class = nil) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Parameters:

  • new_arg_class (Class) (defaults to: nil) —

    A class to use for building argument definitions



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# File 'lib/graphql/schema/member/has_arguments.rb', line 113

def argument_class(new_arg_class = nil)
  self.class.argument_class(new_arg_class)
end

#arguments ⇒ Hash<String => GraphQL::Schema::Argument] Arguments defined on this thing, keyed by name. Includes inherited definitions

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns Hash<String => GraphQL::Schema::Argument] Arguments defined on this thing, keyed by name. Includes inherited definitions.

Returns:

  • (Hash<String => GraphQL::Schema::Argument] Arguments defined on this thing, keyed by name. Includes inherited definitions) —

    Hash<String => GraphQL::Schema::Argument] Arguments defined on this thing, keyed by name. Includes inherited definitions



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# File 'lib/graphql/schema/member/has_arguments.rb', line 86

def arguments
  inherited_arguments = ((self.is_a?(Class) && superclass.respond_to?(:arguments)) ? superclass.arguments : nil)
  # Local definitions override inherited ones
  if inherited_arguments
    inherited_arguments.merge(own_arguments)
  else
    own_arguments
  end
end

#arguments_statically_coercible? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:



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# File 'lib/graphql/schema/member/has_arguments.rb', line 191

def arguments_statically_coercible?
  return @arguments_statically_coercible if defined?(@arguments_statically_coercible)

  @arguments_statically_coercible = arguments.each_value.all?(&:statically_coercible?)
end

#coerce_arguments(parent_object, values, context) {|Interpreter::Arguments, Execution::Lazy<Interpeter::Arguments>| ... } ⇒ Interpreter::Arguments, Execution::Lazy<Interpeter::Arguments>

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

If given a block, it will eventually yield the loaded args to the block.

If no block is given, it will immediately dataload (but might return a Lazy).

Parameters:

Yields:

Returns:



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# File 'lib/graphql/schema/member/has_arguments.rb', line 126

def coerce_arguments(parent_object, values, context, &block)
  # Cache this hash to avoid re-merging it
  arg_defns = self.arguments
  total_args_count = arg_defns.size

  finished_args = nil
  prepare_finished_args = -> {
    if total_args_count == 0
      finished_args = GraphQL::Execution::Interpreter::Arguments::EMPTY
      if block_given?
        block.call(finished_args)
      end
    else
      argument_values = {}
      resolved_args_count = 0
      raised_error = false
      arg_defns.each do |arg_name, arg_defn|
        context.dataloader.append_job do
          begin
            arg_defn.coerce_into_values(parent_object, values, context, argument_values)
          rescue GraphQL::ExecutionError, GraphQL::UnauthorizedError => err
            raised_error = true
            finished_args = err
            if block_given?
              block.call(finished_args)
            end
          end

          resolved_args_count += 1
          if resolved_args_count == total_args_count && !raised_error
            finished_args = context.schema.after_any_lazies(argument_values.values) {
              GraphQL::Execution::Interpreter::Arguments.new(
                argument_values: argument_values,
              )
            }
            if block_given?
              block.call(finished_args)
            end
          end
        end
      end
    end
  }

  if block_given?
    prepare_finished_args.call
    nil
  else
    # This API returns eagerly, gotta run it now
    context.dataloader.run_isolated(&prepare_finished_args)
    finished_args
  end
end

#get_argument(argument_name) ⇒ GraphQL::Schema::Argument?

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns Argument defined on this thing, fetched by name.

Returns:



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# File 'lib/graphql/schema/member/has_arguments.rb', line 97

def get_argument(argument_name)
  a = own_arguments[argument_name]

  if a || !self.is_a?(Class)
    a
  else
    for ancestor in ancestors
      if ancestor.respond_to?(:own_arguments) && a = ancestor.own_arguments[argument_name]
        return a
      end
    end
    nil
  end
end

#own_arguments ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/graphql/schema/member/has_arguments.rb', line 284

def own_arguments
  @own_arguments || NO_ARGUMENTS
end

#validate_directive_argument(arg_defn, value) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Usually, this is validated statically by RequiredArgumentsArePresent, but not for directives. TODO apply static validations on schema definitions?



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# File 'lib/graphql/schema/member/has_arguments.rb', line 183

def validate_directive_argument(arg_defn, value)
  if arg_defn.owner.is_a?(Class) && arg_defn.owner < GraphQL::Schema::Directive
    if value.nil? && arg_defn.type.non_null?
      raise ArgumentError, "#{arg_defn.path} is required, but no value was given"
    end
  end
end