diff --git a/lib/generators/jsonapi/swagger/templates/swagger.rb.erb b/lib/generators/jsonapi/swagger/templates/swagger.rb.erb
index 106fa48..717a6a4 100644
--- a/lib/generators/jsonapi/swagger/templates/swagger.rb.erb
+++ b/lib/generators/jsonapi/swagger/templates/swagger.rb.erb
@@ -11,7 +11,9 @@ RSpec.describe '<%= resouces_name %>', type: :request do
       tags '<%= route_resouces %>'
       produces 'application/vnd.api+json'
       parameter name: :'page[number]', in: :query, type: :string, description: '<%= t(:page_num) %>', required: false
+<% if relationships.present? -%>
       parameter name: :include, in: :query, type: :string, description: '<%= t(:include_related_data) %>', required: false
+<% end -%>
 <% filters.each do |filter_attr, filter_config| -%>
       parameter name: :'filter[<%= filter_attr %>]', in: :query, type: :string, description: '<%= t(:filter_field) %>', <% if filter_config[:default] -%>default: '<%= safe_encode(filter_config[:default]) %>',<% end %>required: false
 <% end -%>
@@ -99,7 +101,9 @@ RSpec.describe '<%= resouces_name %>', type: :request do
       tags '<%= route_resouces %>'
       produces 'application/vnd.api+json'
       parameter name: :id, in: :path, type: :integer, description: 'ID', required: true
+<% if relationships.present? -%>
       parameter name: :include, in: :query, type: :string, description: '<%= t(:include_related_data) %>', required: false
+<% end -%>
       parameter name: :'fields[<%= route_resouces %>]', in: :query, type: :string, description: '<%= t(:display_field) %>', required: false
 <% relationships.each_value do |relation| -%>
       parameter name: :'fields[<%= relation.class_name.tableize %>]', in: :query, type: :string, description: '<%= t(:display_field) %>', required: false
diff --git a/lib/jsonapi/swagger/railtie.rb b/lib/jsonapi/swagger/railtie.rb
index 70ee731..918a246 100644
--- a/lib/jsonapi/swagger/railtie.rb
+++ b/lib/jsonapi/swagger/railtie.rb
@@ -6,7 +6,7 @@ module Jsonapi
       initializer 'jsonapi-swagger-i18n' do |app|
         locates = app.config.i18n.available_locales
         locates_dir = File.expand_path('../../i18n', __dir__)
-        locates.each do |loc|
+        Array(locates).each do |loc|
           locate_file = File.join(locates_dir, "#{loc}.yml")
           I18n.load_path.push(locate_file) if File.exist?(locate_file) && !I18n.load_path.include?(locate_file)
         end