How to get url_for an object in Model method in Rails

Question

I would like to create a string that include a path for an object in Rails.

  def notification_content   
      "#{app.listing_url(my_listing, :host => "example.com")}. " +
  end

This content will then be fed into my ActionMailer as email content.

In console, it works fine. However, when I run it on localhost server, I get the following error:

undefined local variable or method `app'

How should I go about it? Also, how can I make the path to be a hyperlink?

Thanks a lot.

score 17 · Accepted Answer · answered Jan 03 '12 at 00:26

17

include Rails.application.routes.url_helpers
def notification_content   
  "#{listing_url(my_listing, :host => "example.com")}. " + ...
end

answered Jan 03 '12 at 00:26

clyfe

1

details here http://stackoverflow.com/questions/341143/can-rails-routing-helpers-i-e-mymodel-pathmodel-be-used-in-models – clyfe Jan 03 '12 at 00:26
15

No need to include; you can just call on that object directly: Rails.application.routes.url_helpers.url_for(...) – Edward Anderson Jun 05 '14 at 15:02
7

This will not work in Rails 5 for those visiting here in the future. – Nick Schwaderer Sep 01 '17 at 09:19

score 2 · Answer 2 · answered Jul 06 '20 at 16:20

2

(From the comments, credit to Edward Anderson)

Prepend url_for with:

Rails.application.routes.url_helpers.url_for(...)

answered Jul 06 '20 at 16:20

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