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I'm really confused about how rails passes parameters to GET-requests. I have a rails app with a login form. If a user wants to login with a default test user, he/she can click on a link which passes the test-email and the test-password.

The following works well:

<%= link_to "test login", login_path(:email => "test-email", :password => "test-password") %>

When this is clicked, the login pages loads with the email- and password-field prefilled.

The problem is, that both the email and the password will be shown in the url. Yesterday, this worked for me:

<%= link_to "test login", login_path(params.except(:email => "test-email", :password => "test-password")) %>

Today, without having changed the code, the parameters are not passed when I use params.except.

So, how can I ensure that the parameters will be passed but not shown in the url?

Edit: problem solved. see my answer.

Nicolas Scherer
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  • http://stackoverflow.com/a/5333786/525478 – Brad Werth Sep 03 '15 at 07:29
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    GET request always show parameters in URL... As you want to click with default username and password then create your one own routes suppose (default_login) and in that method authenticate your request with default one. – Sanket Sep 03 '15 at 07:30
  • Well, as mentioned above, it already worked for me. When using `params.except`, parameters will be passed but not shown in the url (url: `.../login?action=foo&controller=bar`. I didn't change this but it stopped working. – Nicolas Scherer Sep 03 '15 at 07:59

1 Answers1

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I solved it. Added the following to my routes.rb:

get 'test_login' => 'sessions#new', :email => "the test email", :password => "the test password"

So i just can call <%= link_to "test login", test_login_path %> This will transmit the default email and password and prefill the login form, but the url will just be .../test_login

In my opinion, that's way smarter than params.except.

Nicolas Scherer
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    Do you know a way of doing this with dinamic values? where the `:email` and `:password` depend on variables. – EmmanuelB Oct 29 '18 at 15:03