CODEWITHSUNDEEP
ruby-on-rails
cdotfeli
cdotfeli

Reputation: 309

How do I add parameters to a link_to external URL?

In my Show User page, I want to add a link to an external website with some values saved in the table passed as parameters.

I got the first part working right, that's simple.

<%= link_to "Outside Site", "http://outsidesite.com/create" %>

But I also want to pass some paramaters which are saved in the database, like @user.email, @user.first_name, etc.

So basically the final link will look like:

http://outsidesite.com/[email protected]&firstname=userfirstname etc etc.

What would be the best way to do this?

Upvotes: 5

Views: 5500

Answers (4)

miksiii
miksiii

Reputation: 2496

You can write the helper method such as url patern. You can check the code bellow:

  def generate_url(url, params = {})
    uri = URI(url)
    uri.query = params.to_query
    uri.to_s
  end

After that, you can call the helper method like:

generate_url("YOUR-URL-ADDR-HERE", :param1 => "first", :param2 => "second")

I hope you find this useful.

Upvotes: 6

axsuul
axsuul

Reputation: 7480

Give this a try

# routes.rb
get 'create?:query' => 'users#create', :as => :create_users_with_query

# models/user.rb
class User < ActiveRecord::Base
  def to_params
    "email=#{self.email}&firstname=#{self.firstname}"
  end
end

# view
<%= link_to "Outside Site", create_users_with_query(@user) %>

Upvotes: -2

kasrak
kasrak

Reputation: 470

This is a valid approach: 

<% = link_to "Outside Site", 
"http://outsidesite.com/create?email=#{@user.email}" %>

Just make sure you escape the variables you're putting into the URL:

require 'uri'
escaped_email = URI.escape(@user.email)

Upvotes: 4

Francesco Belladonna
Francesco Belladonna

Reputation: 11689

Because rails don't know how the website want it's paramteres, I think you must do it with string concatenation. At least, you can write a helper to do this for you but will just become a string concatenation in the end.

Upvotes: 1

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