Fix issue where scope is nil when a param_group is accessed nested within response (#774)

* fix validator.rb

* add tests

* add newlines at end of file

* fix indentation

Author: olliswe

lib/apipie/validator.rb

@@ -337,6 +337,7 @@ def params_ordered
         @params_ordered ||= _apipie_dsl_data[:params].map do |args|
           options = args.find { |arg| arg.is_a? Hash }
           options[:parent] = self.param_description
+          options[:param_group] = @param_group
           Apipie::ParamDescription.from_dsl_data(param_description.method_description, args)
         end
       end

spec/controllers/included_param_group_controller_spec.rb

@@ -0,0 +1,13 @@
+require 'spec_helper'
+
+
+describe IncludedParamGroupController do
+
+  let(:dsl_data) { ActionController::Base.send(:_apipie_dsl_data_init) }
+
+  it "should not error when there is a param_group that is deeply nested in response description" do
+    subject = Apipie.get_resource_description(IncludedParamGroupController, Apipie.configuration.default_version)
+    expect(subject._methods.keys).to include(:show)
+  end
+
+end

spec/dummy/app/controllers/included_param_group_controller.rb

@@ -0,0 +1,19 @@
+class IncludedParamGroupController < ApplicationController
+  include RandomParamGroup
+
+  api :GET, '/included-param-group'
+  returns code:200 do
+    property :top_level, Array, of: Hash do
+      param_group :random_param_group
+    end
+    property :nested, Hash do
+      property :random_array, Array, of: Hash do
+        param_group :random_param_group
+      end
+    end
+  end
+  def show
+  end
+
+end
+

spec/dummy/app/helpers/random_param_group.rb

@@ -0,0 +1,8 @@
+module RandomParamGroup
+  def self.included(klazz)
+    klazz.def_param_group :random_param_group do
+      property :id, Integer
+      property :name, String
+    end
+  end
+end