How to pass updating javascript variable into form to controller in Ruby on Rails?

Question

I have the following javascript:

<script type="text/javascript" charset="utf-8">
$(function() {
    $( "#slider-range" ).slider({
        range: true,
        min: 200,
        max: 2000,
        values: [ 800, 1200 ],
        slide: function( event, ui ) {
            $( "#amount" ).val( "$" + ui.values[ 0 ] + " - $" + ui.values[ 1 ] );
        }
    });

    $( "#amount" ).val( "$" + $( "#slider-range" ).slider( "values", 0 ) +
        " - $" + $( "#slider-range" ).slider( "values", 1 ) );

});

The code creates a price range and a slider bar, price range slides as user moves bar. I want to pass the min price and max price into the form like:

<%= form_tag laptops_path, :method => 'get' do %>
    <%= hidden_field_tag "amount", params[:amount] %>

<%= submit_tag "Search", :name => nil %>

But when I do so, the "amount" is still coming blank when submitted. Any ideas why?

Thre eseems to be no problem at the first look. Can you please check whether your amount element in GUI is updated to required value? — LPD
– LPD, Commented Dec 22, 2012 at 4:02

Joe Johnson · Accepted Answer · 2012-12-22 04:25:37Z

2

Make sure that your input element has an id attribute (not just name attribue). #amount means nothing without the id attribute (however, you could use: input[name=amount], if that's the problem).

answered Dec 22, 2012 at 4:25

Joe Johnson

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