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# File 'lib/graphql/static_validation/rules/variable_usages_are_allowed.rb', line 6
def validate(context)
declared_variables = {}
context.visitor[GraphQL::Language::Nodes::OperationDefinition] << ->(node, parent) {
declared_variables = node.variables.each_with_object({}) { |var, memo| memo[var.name] = var }
}
context.visitor[GraphQL::Language::Nodes::Argument] << ->(node, parent) {
return if !node.value.is_a?(GraphQL::Language::Nodes::VariableIdentifier)
if parent.is_a?(GraphQL::Language::Nodes::Field)
arguments = context.field_definition.arguments
elsif parent.is_a?(GraphQL::Language::Nodes::Directive)
arguments = context.directive_definition.arguments
elsif parent.is_a?(GraphQL::Language::Nodes::InputObject)
arguments = context.argument_definition.type.unwrap.input_fields
else
raise("Unexpected argument parent: #{parent}")
end
var_defn_ast = declared_variables[node.value.name]
var_defn_ast && validate_usage(arguments, node, var_defn_ast, context)
}
end
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