How to handle remote_form_tag post either by i) ajax or ii) redirection

Rails
1

Hi,

I have non-model custom validation for a data input to a certain
remote_form_tag view. I’d like to have differential responses in the
controller in the following cases:

  1. when remote_form_tag post results fail validation, the form view is
    updated from the controller, as by the following:

    render :update do |page|
    page.replace_html ‘errors’, :partial => “iod_errors”
    end

  2. when the remote_form_tag post results passes validation, the
    controller redirects to another action or view, as in the following:

    redirect_to passed_validation_url

Unfortunately, using the following simple parameterization of
form_remote_tag,

 <% form_remote_tag :url=>create_iod_url do %>
       ...

I am succesful in my case 1), but nothing happens at all in my case
2).

Any suggestions?

Thanks,

Lille

2

On May 25, 6:01 pm, Lille [email protected] wrote:

I am succesful in my case 1), but nothing happens at all in my case
2).

If your form is expecting rjs then you need to give it rjs (eg
page.redirect_to).

Fred

3

Fred,

Thanks, that worked great.

I don’t understand why the form is expecting anything after it has
submitted to the controller, i.e., I don’t understand that a
remote_form_tag handles redirect_to calls. Maybe I don’t get where RJS
is ‘taking place’.

For the record the solution snippet sequence is as follows:

[controller action: case 1]

  render :update do |page|
     page.replace_html 'errors', :partial => "iod_errors"
  end

[controller action: case 2]

  render :update do |page|
     page.redirect_to passed_validation_url
  end

[form_remote_tag]

 <% form_remote_tag :url=>create_iod_url do %>
4

On May 25, 6:23 pm, Lille [email protected] wrote:

Fred,

Thanks, that worked great.

I don’t understand why the form is expecting anything after it has
submitted to the controller, i.e., I don’t understand that a
remote_form_tag handles redirect_to calls. Maybe I don’t get where RJS
is ‘taking place’.

What rjs means is that a response consisting entirely of javascript is
generated. Ajax requests in prototype come in two flavours: Either
they expect to get a fragment of html back which they insert into a
specific place in the DOM or they expect to get some javascript back
in which case they execute it. Stuff like link_to_remote and
remote_form_for will create the former (Ajax.Updater) if you supply
an :update option (the id of the element to update) and an
Ajax.Request if not

Fred