Rails form with remote action for only one field

Question

I have a form in Rails 3 that must be submitted with a normal post, like this

<%= form_for @seller, :as => :seller_user, :url => save_seller_url do |f| %>

but one of the field inside needs to execute a remote ajax call to update some value, like this one

<%= f.select( ... ) %> => on change please make a remote call to fill new data here

I did not found any documentation online to add the :remote => true option to the select helper, am I missing something?
what is the correct way of handling this?
Thank you

n_i_c_k · Accepted Answer · 2012-11-20 04:52:05Z

1

I wrestled with this for a while too. I think the best "rails way" to do it is like:

<%= form_tag(controller: "sellers", action: "your_controller_action") do %>
    OTHER FORM STUFF HERE
    <select name="some_select" id="some_select" onchange="your_javascript_function">
        <option> ... </option>
    </select>
    OTHER FORM STUFF HERE
    <%= submit_tag("Submit") %>
<% end %>

Then in your controller to handle the submit, you can refer to this field like normal, as params[:some_select]

This assumes your controller is called sellers_controller. More about form_tag here and form_tag helpers here

answered Nov 20, 2012 at 4:52

n_i_c_k

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2 Comments

mottalrd Over a year ago

therefore you are suggesting not to use the select helper function and to handle the ajax call manually in the javascript handler linked to the onchange event?

n_i_c_k Over a year ago

yes. only because i feel like the ease outweighs the hassle of trying to do it with form_for

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