Use local variables

Signed-off-by: Kenji Okimoto <okimoto@clear-code.com>

app/views/fluentd/settings/in_forward/_form.html.haml

@@ -1,18 +1,18 @@
 = render "shared/setting_errors"
 
 - # NOTE: plugin_setting_form_action_url is defined at SettingConcern
-= form_with(model: @setting, scope: "setting", url: plugin_setting_form_action_url(@fluentd), local: true, class: "ignore-rails-error-div", builder: FluentdFormBuilder) do |f|
-  - @setting.common_options.each do |key|
+= form_with(model: setting, scope: "setting", url: plugin_setting_form_action_url(fluentd), local: true, class: "ignore-rails-error-div", builder: FluentdFormBuilder) do |f|
+  - setting.common_options.each do |key|
     = f.field(key)
 
-  = render "shared/vue/transport_section", setting: @setting, form: f
+  = render "shared/vue/transport_section", setting: setting, form: f
 
   .card.card-body.bg-light
     %h4{"data-toggle" => "collapse", "href" => "#advanced-setting"}
       = icon('fa-caret-down')
       = t('terms.advanced_setting')
     #advanced-setting.collapse
-      - @setting.advanced_options.each do |key|
+      - setting.advanced_options.each do |key|
         = f.field(key)
 
   = f.submit t('fluentd.common.finish'), class: "btn btn-lg btn-primary pull-right"

app/views/shared/settings/show.html.haml

@@ -6,6 +6,6 @@
     = raw t("fluentd.settings.#{target_plugin_name}.option_guide")
 
 - if lookup_context.exists?("form", controller.controller_path, true)
-  = render "#{controller.controller_path}/form"
+  = render "#{controller.controller_path}/form", setting: @setting, fluentd: @fluentd
 - else
-  = render "shared/settings/form"
+  = render "shared/settings/form", setting: @setting, fluentd: @fluentd