Module: GraphQL::StaticValidation::VariableUsagesAreAllowed

Defined in:
lib/graphql/static_validation/rules/variable_usages_are_allowed.rb

Instance Method Summary collapse

Instance Method Details

#initializeObject


5
6
7
8
9
# File 'lib/graphql/static_validation/rules/variable_usages_are_allowed.rb', line 5

def initialize(*)
  super
  # holds { name => ast_node } pairs
  @declared_variables = {}
end

#on_argument(node, parent) ⇒ Object


16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
# File 'lib/graphql/static_validation/rules/variable_usages_are_allowed.rb', line 16

def on_argument(node, parent)
  node_values = if node.value.is_a?(Array)
    node.value
  else
    [node.value]
  end
  node_values = node_values.select { |value| value.is_a? GraphQL::Language::Nodes::VariableIdentifier }

  if node_values.any?
    arguments = case parent
    when GraphQL::Language::Nodes::Field
      context.field_definition.arguments
    when GraphQL::Language::Nodes::Directive
      context.directive_definition.arguments
    when GraphQL::Language::Nodes::InputObject
      arg_type = context.argument_definition.type.unwrap
      if arg_type.is_a?(GraphQL::InputObjectType)
        arguments = arg_type.input_fields
      else
        # This is some kind of error
        nil
      end
    else
      raise("Unexpected argument parent: #{parent}")
    end

    node_values.each do |node_value|
      var_defn_ast = @declared_variables[node_value.name]
      # Might be undefined :(
      # VariablesAreUsedAndDefined can't finalize its search until the end of the document.
      var_defn_ast && arguments && validate_usage(arguments, node, var_defn_ast)
    end
  end
  super
end

#on_operation_definition(node, parent) ⇒ Object


11
12
13
14
# File 'lib/graphql/static_validation/rules/variable_usages_are_allowed.rb', line 11

def on_operation_definition(node, parent)
  @declared_variables = node.variables.each_with_object({}) { |var, memo| memo[var.name] = var }
  super
end