Send querystring params as part of form post

Question

Is there a way to capture the querystring and send that along as part of a form post? I\'m using Rails 2.3.5 and my user is on a page that has multiple querystring parameters. O

Answer 1

<% form_tag params.merge(:action=>"someAction") do %>

- No route matches [POST]

Answer 2

A friend of mine showed me what I believe is an easier way:

<% form_tag params.merge(:action=>"someAction") do %>

Merging params into the hash necessary for making the form_tag did the trick perfectly.

Answer 3

The preferred way would be to use hidden fields. I haven't tried it, but I think you can specify additional query string parameters within the *_path or *_url helpers. Something like:

<% form_for(@post,
           :url => post_path(@post, :foo => 'foo', :bar => 'bar')) do |f| %>
  ...
<% end %>

Answer 4

Use hidden_field_tag if you're using a GET request.

In our case we were using a simple form with a select for setting the Per Page values for pagination. We found that any existing GET params were cleared when submitting this form. To fix this we used hidden_field_tags in our form.

Inside of your form, just set hidden_field_tags for the existing GET params, like so:

form_content = request.query_parameters.collect do |key, value|
  hidden_field_tag key, value
end

This will ensure that your existing params persist.