Rails从索引页面传递参数

Question

I have a Rails app where I list records on an index page. One of the columns is:

<td><%= check_box_tag "event_ids[]", event.id %></td>

I have a button on the bottom of the index page:

<%= link_to 'Submit ', addinvtimes_invtimes_path, :class => 'btn btn-success' %>

I wanted this code to run in the invtimes controller:

   def addinvtimes
    if params[:event_ids] != nil
      params[:event_ids].each do |i|
        newinvtime = Invtime.new(
            linetype_id: 1,
            invoice_id: @invoice.id,
            event_id: i.to_i
        )
      end
    end
  end

But, params[:event_ids] is nil even if several boxes are checked.

Can't you submit params using an index page? Does it have to be a form?

Thanks for the help!

UPDATE 1

I tried passing the array event_ids[] in the call:

<%= link_to 'Submit ', addinvtimes_invtimes_path(:workorder_id => @workorder, :event_ids[] => event_ids[]), :class => 'btn btn-success' %>

But, got:

wrong number of arguments (0 for 1..2)

I just need the array event_ids[] to be accessible in the controller code addinvtimes .

UPDATE2

All I'm trying to do is list a bunch of records and include a checkbox column. Then in the controller get back a list of ids for the rows that were checked.

Answer 1

The type of the page (index, new, edit, etc.) does not affect the ability to submit data, however, a form is required if you want to post data using pure HTML to be in the params hash.

UPDATE1:

As for the update, adding :event_ids[] as a parameter to the link will only add it as a querystring parameter to the link, assigning it the value of event_ids[] at the time the view is parsed. Changes to the checkboxes in the html will not be reflected in the querystring. I think, the easiest way would be to just wrap the checkboxes and the submit into a form tag and let it post the data to your controller action.

Oh, and I just saw, the wrong number of arguments error resulted in calling [] on event_ids without an index. I wasn't sure, but apparently you can't have [] in variable names.