Here's an annoyance I've run into before, and a simple patch to fix
it. Say I want to export some data as xml. I should be able to fire
up a script or rake task with my environment, grab some data, then
render an rxml template. However, ActionView::Base makes the
assumption that I have a controller somewhere and sets tries to set
content type headers on it.
The only workaround I've found to date is to create a TestRequest and
TestResponse, build an action that loads the data I want and renders
with the template I want, expose the action through a real
controller, then call the TestRequest and scrape the body of the
TestResponse. It works, but it feels....wrong.
This patch skips setting content-type header if there is no
controller object, and allows for "standalone" ActionView? use like so:
contacts = Contact.find(:all)
builder = ActionView::Base.new
xml = builder.render( :inline => File.open('template.rxml').read,
:type => :rxml,
:locals => { :contacts => contacts } )
...
This isn't limited to rxml, obviously -- you can use ERb templates
for other data formats.
I've opened this as a ticket: http://dev.rubyonrails.org/ticket/5496
Patch follows and is attached to the ticket.
Thanks!
Solomon
------------------------------------------------------------------------
----------------------------
Index: vendor/rails/actionpack/lib/action_view/base.rb
===================================================================
--- vendor/rails/actionpack/lib/action_view/base.rb (revision 4450)
+++ vendor/rails/actionpack/lib/action_view/base.rb (working copy)
@@ -438,10 +438,10 @@
body = case extension.to_sym
when :rxml
"xml = Builder::XmlMarkup.new(:indent => 2)\n" +
- "@controller.headers['Content-Type'] ||= 'application/
xml'\n" +
+ (@controller.nil? ? "" : "@controller.headers['Content-
Type'] ||= 'application/xml'\n") +
template
when :rjs
- "@controller.headers['Content-Type'] ||= 'text/
javascript'\n" +
+ (@controller.nil? ? "" : "@controller.headers['Content-
Type'] ||= 'text/javascript'\n") +
"update_page do |page|\n#{template}\nend"
end
else
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