Full url for an image-path in Rails 3

Question

I have an Image, which contains carrierwave uploads:

Image.find(:first).image.url #=> \"/uploads/image/4d90/display_foo.jpg\"

In my vie

Answer 1

Just taking floor's answer and providing the helper:

# Use with the same arguments as image_tag. Returns the same, except including
# a full path in the src URL. Useful for templates that will be rendered into
# emails etc.
def absolute_image_tag(*args)
  raw(image_tag(*args).sub /src="(.*?)"/, "src=\"#{request.protocol}#{request.host_with_port}" + '\1"')
end

Answer 2

try path method

Image.find(:first).image.path

UPD

request.host + Image.find(:first).image.url

and you can wrap it as a helper to DRY it forever

request.protocol + request.host_with_port + Image.find(:first).image.url

Answer 3

Another simple method to use is URI.parse, in your case would be

require 'uri'

(URI.parse(root_url) + image.url).to_s

and some examples:

1.9.2p320 :001 > require 'uri'
 => true 
1.9.2p320 :002 > a = "http://asdf.com/hello"
 => "http://asdf.com/hello" 
1.9.2p320 :003 > b = "/world/hello"
 => "/world/hello" 
1.9.2p320 :004 > c = "world"
 => "world" 
1.9.2p320 :005 > d = "http://asdf.com/ccc/bbb"
 => "http://asdf.com/ccc/bbb" 
1.9.2p320 :006 > e = "http://newurl.com"
 => "http://newurl.com" 
1.9.2p320 :007 > (URI.parse(a)+b).to_s
 => "http://asdf.com/world/hello" 
1.9.2p320 :008 > (URI.parse(a)+c).to_s
 => "http://asdf.com/world" 
1.9.2p320 :009 > (URI.parse(a)+d).to_s
 => "http://asdf.com/ccc/bbb" 
1.9.2p320 :010 > (URI.parse(a)+e).to_s
 => "http://newurl.com" 

Answer 4

I used default_url_options, because request is not available in mailer and avoided duplicating hostname in config.action_controller.asset_host if haven't specified it before.

config.asset_host = ActionDispatch::Http::URL.url_for(ActionMailer::Base.default_url_options)

Answer 5

I found this trick to avoid double slash:

URI.join(root_url, image.url)

Answer 6

You can actually easily get this done by

root_url[0..-2] + image.url

I agree it doesn't look too good, but gets the job done.. :)