Display better error message after admin redirect

app/views/layouts/_flash.html.haml

@@ -0,0 +1,18 @@
+- if flash[:notice]
+  .alert-message.success{:"data-alert" => true}
+    %a{:class => "close", :href => "#"}
+      ×
+    %p
+      = flash[:notice]
+- if flash[:warning]
+  .alert-message.warning{:"data-alert" => true}
+    %a{:class => "close", :href => "#"}
+      ×
+    %p
+      = flash[:warning]
+- if flash[:error]
+  .alert-message.error{:"data-alert" => true}
+    %a{:class => "close", :href => "#"}
+      ×
+    %p
+      = flash[:error]

app/views/layouts/info_window.html.haml

@@ -1,22 +1,5 @@
 #loader{:style => "display: none;"}
   = image_tag "ajax-loader.gif"
 #info_window
-  - if flash[:notice]
-    .alert-message.success{:"data-alert" => true}
-      %a{:class => "close", :href => "#"}
-        ×
-      %p
-        = flash[:notice]
-  - if flash[:warning]
-    .alert-message.warning{:"data-alert" => true}
-      %a{:class => "close", :href => "#"}
-        ×
-      %p
-        = flash[:warning]
-  - if flash[:error]
-    .alert-message.error{:"data-alert" => true}
-      %a{:class => "close", :href => "#"}
-        ×
-      %p
-        = flash[:error]
+  = render :partial => "layouts/flash", :locals => {:flash => flash}
   = yield

app/views/layouts/sidebar.html.haml

@@ -1,19 +1,2 @@
-- if flash[:notice]
-  .alert-message.success{:"data-alert" => true}
-    %a{:class => "close", :href => "#"}
-      ×
-    %p
-      = flash[:notice]
-- if flash[:warning]
-  .alert-message.warning{:"data-alert" => true}
-    %a{:class => "close", :href => "#"}
-      ×
-    %p
-      = flash[:warning]
-- if flash[:error]
-  .alert-message.error{:"data-alert" => true}
-    %a{:class => "close", :href => "#"}
-      ×
-    %p
-      = flash[:error]
+= render :partial => "layouts/flash", :locals => {:flash => flash}
 = yield

app/views/main/index.html.haml

@@ -6,6 +6,7 @@
       %p.alert-message#tagline
         = t("defaults.tagline")
       #content
+        = render :partial => "layouts/flash", :locals => {:flash => flash}
         - if signed_in?
           = render :partial => "sidebar/search"
         - else

config/initializers/rails_admin.rb

@@ -1,5 +1,5 @@
 RailsAdmin.config do |config|
   config.authenticate_with do
-    redirect_to main_app_root_path unless signed_in? && current_user.admin?
+    redirect_to(main_app.root_path, :flash => {:warning => "You must be signed-in as an administrator to access that page"}) unless signed_in? && current_user.admin?
   end
 end