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PODynamic error pages in Rails 3
 

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  1. PODynamic error pages in Rails 3
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    <p>In Rails 2.3.x, you can override <code>render_optional_error_file</code> like so:</p> <pre><code># ApplicationController.rb protected def render_optional_error_file(status_code) render :template =&gt; "errors/500", :status =&gt; 500, :layout =&gt; 'application' end </code></pre> <p>However, Rails 3 no longer has <code>render_optional_error_file</code>. Instead, you need to override <code>rescue_action_in_public</code>, which you can do like so:</p> <pre><code># config/initializers/error_page.rb module ActionDispatch class ShowExceptions protected def rescue_action_in_public(exception) status = status_code(exception).to_s template = ActionView::Base.new(["#{Rails.root}/app/views"]) if ["404"].include?(status) file = "/errors/404.html.erb" else file = "/errors/500.html.erb" end body = template.render(:file =&gt; file) render(status, body) end end end </code></pre> <p>This works, but does not use the application's layout. However, if you specify the layout path like so:</p> <pre><code>body = template.render(:file =&gt; file, :layout =&gt; "layouts/application") # line 15 </code></pre> <p>You get an <code>Error during failsafe response: ActionView::Template::Error</code>. </p> <p>Line 4 of application.html.erb:4 is:</p> <pre><code>&lt;%= stylesheet_link_tag "app", "jquery-ui", "jquery.fancybox", :cache =&gt; "all" %&gt; </code></pre> <p>Whatever ActionView normally uses to render templates isn't getting loaded.</p> <p>The stack trace is:</p> <pre><code> /var/lib/gems/1.8/gems/actionpack-3.0.5/lib/action_view/helpers/asset_tag_helper.rb:794:in `join' /var/lib/gems/1.8/gems/actionpack-3.0.5/lib/action_view/helpers/asset_tag_helper.rb:794:in `rails_asset_id' /var/lib/gems/1.8/gems/actionpack-3.0.5/lib/action_view/helpers/asset_tag_helper.rb:817:in `rewrite_asset_path' /var/lib/gems/1.8/gems/actionpack-3.0.5/lib/action_view/helpers/asset_tag_helper.rb:746:in `compute_public_path' /var/lib/gems/1.8/gems/actionpack-3.0.5/lib/action_view/helpers/asset_tag_helper.rb:424:in `path_to_stylesheet' /var/lib/gems/1.8/gems/actionpack-3.0.5/lib/action_view/helpers/asset_tag_helper.rb:875:in `ensure_stylesheet_sources!' /var/lib/gems/1.8/gems/actionpack-3.0.5/lib/action_view/helpers/asset_tag_helper.rb:874:in `each' /var/lib/gems/1.8/gems/actionpack-3.0.5/lib/action_view/helpers/asset_tag_helper.rb:874:in `ensure_stylesheet_sources!' /var/lib/gems/1.8/gems/actionpack-3.0.5/lib/action_view/helpers/asset_tag_helper.rb:512:in `stylesheet_link_tag' /data/sites/fundraisers-stage/releases/20110316194843/app/views/layouts/application.html.erb:4:in `_app_views_layouts_application_html_erb___19482063_70294907435920_0' /var/lib/gems/1.8/gems/actionpack-3.0.5/lib/action_view/template.rb:135:in `send' /var/lib/gems/1.8/gems/actionpack-3.0.5/lib/action_view/template.rb:135:in `render' /var/lib/gems/1.8/gems/activesupport-3.0.5/lib/active_support/notifications.rb:54:in `instrument' /var/lib/gems/1.8/gems/actionpack-3.0.5/lib/action_view/template.rb:127:in `render' /var/lib/gems/1.8/gems/actionpack-3.0.5/lib/action_view/render/layouts.rb:80:in `_render_layout' /var/lib/gems/1.8/gems/actionpack-3.0.5/lib/action_view/render/rendering.rb:62:in `_render_template' /var/lib/gems/1.8/gems/activesupport-3.0.5/lib/active_support/notifications.rb:52:in `instrument' /var/lib/gems/1.8/gems/activesupport-3.0.5/lib/active_support/notifications/instrumenter.rb:21:in `instrument' /var/lib/gems/1.8/gems/activesupport-3.0.5/lib/active_support/notifications.rb:52:in `instrument' /var/lib/gems/1.8/gems/actionpack-3.0.5/lib/action_view/render/rendering.rb:56:in `_render_template' /var/lib/gems/1.8/gems/actionpack-3.0.5/lib/action_view/render/rendering.rb:26:in `render' /data/sites/fundraisers-stage/releases/20110316194843/config/initializers/error_pages.rb:15:in `rescue_action_in_public' </code></pre>
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