Why am I getting this No Route Matches Error in Rails?

Question

I get this error:

Started POST "/admin/reports/2/backfill" for 127.0.0.1 at Thu Dec 29 16:09:00 -0500 2011

ActionController::RoutingError (No route matches "/admin/reports/2/backfill"):

when I post this form:

<%=form_for @report, {:url => report_backfill_path(@report.id), :method => :post} do |f| %>
    <%=label_tag(:days, "number of days to backfill")%>
    <%=select_tag(:days, options_for_select((1..100).to_a.map{|i| [i,i]}))%>
    <%=f.submit "backfill!" %>
<% end %>

but the route is defined, check out the output from my rake routes command:

report_backfill POST   /admin/reports/:report_id/backfill(.:format)    {:controller=>"reports", :action=>"backfill"}

The page containing this form renders fine, it's just when I post it that I get the error.

Any ideas?

Answer 1

Because you use form_for @report and @report is an existing model, it generates the PUT helpers in the hidden fields, which makes the route engine think it is a PUT request.

Actually, to follow the rails conventions, since you are calling an extra method on the existing report (even though the side effect may be to create things), I would change the routing to use :put instead of :post , and leave the form alone.