How to create a delete form with RESTful routes in Rails. - ruby-on-rails

Question

I am trying to create a form that serves as confirmation for the destroy method on a controller. In my routes I have:
resources :leagues do
get 'delete', :on => :member
end
In my delete.html.erb, I have the following for:
<% form_for current_league, :html => {:method => :delete} do |form| %>
<%= form.submit 'Yes' %>
<%= form.submit 'No', :name => 'cancel' %>
<% end %>
current_league is a helper function defined by:
def current_league
#current_league ||= League.find_by_id(params[:id])
end
So the problem is that the form that is generated only edits the league model, as seen by the form method="post".
<form accept-charset="UTF-8" action="/leagues/1" class="edit_league" id="edit_league_1" method="post">
<div style="margin:0;padding:0;display:inline"><input name="utf8" type="hidden" value="✓" />
<input name="_method" type="hidden" value="delete" />
<input name="authenticity_token" type="hidden" value="abcdefg" />
</div>
<input id="league_submit" name="commit" type="submit" value="Yes" />
<input id="league_submit" name="cancel" type="submit" value="No" />
</form>
How can I fix this?

Answer 1

I think that will already work. As in rails guide http://guides.rubyonrails.org/form_helpers.html#how-do-forms-with-patch-put-or-delete-methods-work-questionmark
However, most browsers don’t support methods other than “GET” and “POST” when it comes to submitting forms.
Rails works`around this issue by emulating other methods over POST with a hidden input named "_method", which is set to reflect the desired method:
as you see in the output form there is
<form accept-charset="UTF-8" action="/leagues/1" class="edit_league" id="edit_league_1" method="post">
....
<input name="_method" type="hidden" value="delete" />
....
</form>
When reading this variable, rails understood that this is a DELETE method, not a POST method. even though the form it self is a POST.