Class: GraphQL::Schema::Argument

Inherits:
Object
  • Object
show all
Includes:
Member::AcceptsDefinition, Member::CachedGraphQLDefinition, Member::HasPath
Defined in:
lib/graphql/schema/argument.rb

Constant Summary collapse

NO_DEFAULT = 
:__no_default__

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Member::HasPath

#path

Methods included from Member::CachedGraphQLDefinition

#graphql_definition, #initialize_copy

Constructor Details

#initialize(arg_name = nil, type_expr = nil, desc = nil, required:, type: nil, name: nil, description: nil, default_value: NO_DEFAULT, as: nil, camelize: true, prepare: nil, owner:, &definition_block) ⇒ Argument

Returns a new instance of Argument.

Parameters:

  • arg_name (Symbol) (defaults to: nil)
  • type_expr (defaults to: nil)
  • desc (String) (defaults to: nil)
  • required (Boolean) —

    if true, this argument is non-null; if false, this argument is nullable

  • description (String) (defaults to: nil)
  • default_value (Object) (defaults to: NO_DEFAULT)
  • as (Symbol) (defaults to: nil) —

    Override the keyword name when passed to a method

  • prepare (Symbol) (defaults to: nil) —

    A method to call to tranform this argument's valuebefore sending it to field resolution

  • camelize (Boolean) (defaults to: true) —

    if true, the name will be camelized when building the schema



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# File 'lib/graphql/schema/argument.rb', line 33

def initialize(arg_name = nil, type_expr = nil, desc = nil, required:, type: nil, name: nil, description: nil, default_value: NO_DEFAULT, as: nil, camelize: true, prepare: nil, owner:, &definition_block)
  arg_name ||= name
  @name = camelize ? Member::BuildType.camelize(arg_name.to_s) : arg_name.to_s
  @type_expr = type_expr || type
  @description = desc || description
  @null = !required
  @default_value = default_value
  @owner = owner
  @as = as
  @keyword = as || Schema::Member::BuildType.underscore(@name).to_sym
  @prepare = prepare

  if definition_block
    if definition_block.arity == 1
      instance_exec(self, &definition_block)
    else
      instance_eval(&definition_block)
    end
  end
end

Instance Attribute Details

#default_value ⇒ Object (readonly)

Returns the value used when the client doesn't provide a value for this argument.

Returns:

  • (Object) —

    the value used when the client doesn't provide a value for this argument



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# File 'lib/graphql/schema/argument.rb', line 55

def default_value
  @default_value
end

#description(text = nil) ⇒ String

Returns Documentation for this argument.

Returns:

  • (String) —

    Documentation for this argument



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# File 'lib/graphql/schema/argument.rb', line 65

def description(text = nil)
  if text
    @description = text
  else
    @description
  end
end

#keyword ⇒ Symbol (readonly)

Returns This argument's name in Ruby keyword arguments.

Returns:

  • (Symbol) —

    This argument's name in Ruby keyword arguments



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# File 'lib/graphql/schema/argument.rb', line 22

def keyword
  @keyword
end

#name ⇒ String (readonly) Also known as: graphql_name

Returns the GraphQL name for this argument, camelized unless camelize: false is provided.

Returns:

  • (String) —

    the GraphQL name for this argument, camelized unless camelize: false is provided



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# File 'lib/graphql/schema/argument.rb', line 12

def name
  @name
end

#owner ⇒ GraphQL::Schema::Field, Class (readonly)

Returns The field or input object this argument belongs to.

Returns:



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# File 'lib/graphql/schema/argument.rb', line 16

def owner
  @owner
end

#prepare ⇒ Symbol (readonly)

Returns A method to call to transform this value before sending it to field resolution method.

Returns:

  • (Symbol) —

    A method to call to transform this value before sending it to field resolution method



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# File 'lib/graphql/schema/argument.rb', line 19

def prepare
  @prepare
end

Instance Method Details

#accessible?(context) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema/argument.rb', line 77

def accessible?(context)
  true
end

#authorized?(obj, ctx) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema/argument.rb', line 81

def authorized?(obj, ctx)
  true
end

#default_value? ⇒ Boolean

Returns True if this argument has a default value.

Returns:

  • (Boolean) —

    True if this argument has a default value



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# File 'lib/graphql/schema/argument.rb', line 58

def default_value?
  @default_value != NO_DEFAULT
end

#prepare_value(obj, 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.

Apply the #prepare configuration to value, using methods from obj. Used by the runtime.



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# File 'lib/graphql/schema/argument.rb', line 107

def prepare_value(obj, value)
  if @prepare.nil?
    value
  elsif @prepare.is_a?(String) || @prepare.is_a?(Symbol)
    obj.public_send(@prepare, value)
  elsif @prepare.respond_to?(:call)
    @prepare.call(value, obj.context)
  else
    raise "Invalid prepare for #{@owner.name}.name: #{@prepare.inspect}"
  end
end

#to_graphql ⇒ Object 



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# File 'lib/graphql/schema/argument.rb', line 85

def to_graphql
  argument = GraphQL::Argument.new
  argument.name = @name
  argument.type = -> { type }
  argument.description = @description
  argument.metadata[:type_class] = self
  argument.as = @as
  if NO_DEFAULT != @default_value
    argument.default_value = @default_value
  end
  argument
end

#type ⇒ Object 



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# File 'lib/graphql/schema/argument.rb', line 98

def type
  @type ||= Member::BuildType.parse_type(@type_expr, null: @null)
rescue StandardError => err
  raise ArgumentError, "Couldn't build type for Argument #{@owner.name}.#{name}: #{err.class.name}: #{err.message}", err.backtrace
end

#visible?(context) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema/argument.rb', line 73

def visible?(context)
  true
end