class GraphQL::StaticValidation::LiteralValidator
Test whether `ast_value` is a valid input for `type`
Public Class Methods
new(context:)
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# File lib/graphql/static_validation/literal_validator.rb, line 6 def initialize(context:) @context = context @warden = context.warden end
Public Instance Methods
validate(ast_value, type)
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# File lib/graphql/static_validation/literal_validator.rb, line 11 def validate(ast_value, type) if type.nil? # this means we're an undefined argument, see #present_input_field_values_are_valid return maybe_raise_if_invalid(ast_value) do false end elsif ast_value.is_a?(GraphQL::Language::Nodes::NullValue) maybe_raise_if_invalid(ast_value) do !type.kind.non_null? end elsif type.kind.non_null? maybe_raise_if_invalid(ast_value) do (!ast_value.nil?) end && validate(ast_value, type.of_type) elsif type.kind.list? item_type = type.of_type ensure_array(ast_value).all? { |val| validate(val, item_type) } elsif ast_value.is_a?(GraphQL::Language::Nodes::VariableIdentifier) true elsif type.kind.scalar? && constant_scalar?(ast_value) maybe_raise_if_invalid(ast_value) do type.valid_input?(ast_value, @context) end elsif type.kind.enum? maybe_raise_if_invalid(ast_value) do if ast_value.is_a?(GraphQL::Language::Nodes::Enum) type.valid_input?(ast_value.name, @context) else # if our ast_value isn't an Enum it's going to be invalid so return false false end end elsif type.kind.input_object? && ast_value.is_a?(GraphQL::Language::Nodes::InputObject) maybe_raise_if_invalid(ast_value) do required_input_fields_are_present(type, ast_value) && present_input_field_values_are_valid(type, ast_value) end else maybe_raise_if_invalid(ast_value) do false end end end
Private Instance Methods
constant_scalar?(ast_value)
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The GraphQL
grammar supports variables embedded within scalars but graphql.js doesn't support it so we won't either for simplicity
# File lib/graphql/static_validation/literal_validator.rb, line 69 def constant_scalar?(ast_value) if ast_value.is_a?(GraphQL::Language::Nodes::VariableIdentifier) false elsif ast_value.is_a?(Array) ast_value.all? { |element| constant_scalar?(element) } elsif ast_value.is_a?(GraphQL::Language::Nodes::InputObject) ast_value.arguments.all? { |arg| constant_scalar?(arg.value) } else true end end
ensure_array(value)
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# File lib/graphql/static_validation/literal_validator.rb, line 109 def ensure_array(value) value.is_a?(Array) ? value : [value] end
maybe_raise_if_invalid(ast_value) { || ... }
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# File lib/graphql/static_validation/literal_validator.rb, line 56 def maybe_raise_if_invalid(ast_value) ret = yield if !@context.schema.error_bubbling && !ret e = LiteralValidationError.new e.ast_value = ast_value raise e else ret end end
present_input_field_values_are_valid(type, ast_node)
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# File lib/graphql/static_validation/literal_validator.rb, line 98 def present_input_field_values_are_valid(type, ast_node) field_map = @warden.arguments(type).reduce({}) { |m, f| m[f.name] = f; m} ast_node.arguments.all? do |value| field = field_map[value.name] # we want to call validate on an argument even if it's an invalid one # so that our raise exception is on it instead of the entire InputObject type = field && field.type validate(value.value, type) end end
required_input_fields_are_present(type, ast_node)
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# File lib/graphql/static_validation/literal_validator.rb, line 81 def required_input_fields_are_present(type, ast_node) # TODO - would be nice to use these to create an error message so the caller knows # that required fields are missing required_field_names = @warden.arguments(type) .select { |f| f.type.kind.non_null? } .map(&:name) present_field_names = ast_node.arguments.map(&:name) missing_required_field_names = required_field_names - present_field_names if @context.schema.error_bubbling missing_required_field_names.none? else missing_required_field_names.all? do |name| validate(GraphQL::Language::Nodes::NullValue.new(name: name), @warden.arguments(type).find { |f| f.name == name }.type ) end end end