Injecting values into all link_to method calls in Ruby on Rails

Question

I have a strange requirement that I need to inject a value at the beginning of all local links. This is a legacy app and is quite large so I'm looking to do it under the hood, maybe with a monkey patch.

Basically if I have a link_to "Go to dashboard", dashboard_path or link_to "Create a new Job", new_job_path that they would both generate links that look like "/some_value/dashboard" and "/some_value/jobs/new"

Tried a few things and they all have failed. Any ideas?

dynamic. it's coming from a param in the url. needs to just pass it along. — Jonathan, May 18 '20 at 13:08

Prasath Rajasekaran · Answer 1 · 2020-05-20T09:51:52.413

0

You can try something like this in your helper instead of monkey patching link_to.

 def custom_link_to(link, url, opts={})
    url = "append_here/"+url
    link_to(link, url, opts)
  end

Now you can call this action instead of calling link_to wherever applicable and also use link_to in case if you don't want to override.

custom_link_to("Go to Dashboard",dashboard_path,{})

UPDATE

In case of overriding everything, something similar to this might be helpful - Monkey patching Rails

edited May 20 '20 at 09:51

answered May 16 '20 at 04:45

Prasath Rajasekaran

187
9

problem with that is that we have 1000s of link_to methods that i don't want to have to update – Jonathan May 18 '20 at 13:09
For those links that you need not update, you can use the normal link_to tag right? Let me know If I am missing something @Jonathan – Prasath Rajasekaran May 18 '20 at 15:49
All the links have to have the value prepended to them. That's why I was looking to subclass or monkey patch. – Jonathan May 19 '20 at 16:03
I have updated the answer. Hope it help you @Jonathan – Prasath Rajasekaran May 20 '20 at 17:54

Injecting values into all link_to method calls in Ruby on Rails

1 Answers1