Destroying nested resources in restful way

Question

I'm looking for help destroying a nested resource in Merb. My current method seems near correct, but the controller raise an InternalServerError during the destruction of the nested object.

Here comes all the details concerning the request, don't hesitate to ask for more :)

Thanks,

Alex

I'm trying to destroy a nested resources using the following route in

router.resources :events, Orga::Events do |event|
  event.resources :locations, Orga::Locations
end

Which gives in jQuery request (delete_ method is a implementation of $.ajax with "DELETE"):

$.delete_("/events/123/locations/456");

In the Location controller side, I've got:

def delete(id)
  @location = Location.get(id)
  raise NotFound unless @location
  if @location.destroy
    redirect url(:orga_locations)
  else
    raise InternalServerError
  end
end

And the log:

merb : worker (port 4000) ~ Routed to: {"format"=>nil, "event_id"=>"123", "action"=>"destroy", "id"=>"456", "controller"=>"letsmotiv/locations"}
merb : worker (port 4000) ~ Params: {"format"=>nil, "event_id"=>"123", "action"=>"destroy", "id"=>"456", "controller"=>"letsmotiv/locations"}
 ~ (0.000025) SELECT `id`, `class_type`, `name`, `prefix`, `type`, `capacity`, `handicap`, `export_name` FROM `entities` WHERE (`class_type` IN ('Location') AND `id` = 456) ORDER BY `id` LIMIT 1
 ~ (0.000014) SELECT `id`, `streetname`, `phone`, `lat`, `lng`, `country_region_city_id`, `location_id`, `organisation_id` FROM `country_region_city_addresses` WHERE `location_id` = 456 ORDER BY `id` LIMIT 1
merb : worker (port 4000) ~ Merb::ControllerExceptions::InternalServerError - (Merb::ControllerExceptions::InternalServerError)

score 0 · Answer 1 · answered Mar 22 '11 at 03:43

Not all browsers actually support sending a real DELETE request. A common work around is to use a POST with a special param of "_method=DELETE".

Assuming your browser actually is sending the DELETE request, a backtrace or some more information from the error would be helpful for further debugging.

score 0 · Answer 2 · answered Mar 29 '11 at 16:18

It looks to me like you are raising the InternalServerError. I think a better way to phrase the question would be "why is @location.destroy returning false?".

Try it in the console and see, I'm guessing you are failing some kind of *before_destroy* callback, or perhaps running afoul of another rule in your Entity model.

Destroying nested resources in restful way

2 Answers2