Unpermitted parameters: error after whitelisting params - ruby-on-rails

Question

I'm getting a "Unpermitted Parameters: :event_id, :attendee_id" even though I'm whitelisting the params
Started POST "/planned_events" for 127.0.0.1 at 2014-08-22 22:08:39 +0900
Processing by PlannedEventsController#create as HTML
Parameters: {"utf8"=>"✓",
"authenticity_token"=>"WhVcJWjo08KWqxFViUPbSZVMYzu2UgGW9E+WRExP9Wc=", "planned_event"=>
{":event_id"=>"3", ":attendee_id"=>"1"}, "commit"=>"Attend"}
Unpermitted parameters: :event_id, :attendee_id
(0.0ms) begin transaction
SQL (0.4ms) INSERT INTO "planned_events" ("created_at", "updated_at") VALUES (?, ?)
[["created_at", Fri, 22 Aug 2014 13:08:39 UTC +00:00], ["updated_at", Fri, 22 Aug 2014
13:08:39 UTC +00:00]]
(1.8ms) commit transaction
Unpermitted parameters: :event_id, :attendee_id
Completed 500 Internal Server Error in 9ms
ActionController::UrlGenerationError (No route matches {:action=>"show",
:controller=>"events", :id=>nil} missing required keys: [:id]):
app/controllers/planned_events_controller.rb:6:in `create'
Here is controllers/planned_events_controller.rb
class PlannedEventsController < ApplicationController
def create
#planned_event = PlannedEvent.new(planned_event_params)
if #planned_event.save
redirect_to event_path(planned_event_params[:event_id])
end
end
def destroy
#planned_event = PlannedEvent.find(params[:id]).destroy
redirect_to event_path(planned_event_params[:event_id] => :id)
end
private
def planned_event_params
params.require(:planned_event).permit(:event_id, :attendee_id)
end
end
Why?
The broswer is highlighting the "redirect_to..." line with the error.
ActionController::UrlGenerationError in PlannedEventsController#create
No route matches {:action=>"show", :controller=>"events", :id=>nil} missing required keys:
[:id]
I assume the :id is nil because it wont accept the id i'm passing it (from the whitelisted params), and can't find an alternative.

Answer 1

Your parameters have wrong names:
{":event_id"=>"3", ":attendee_id"=>"1"}
Change them in your form, incoming parameters should be
{"event_id"=>"3", "attendee_id"=>"1"}
Also, you can change whole redirect_to to shorter version:
redirect_to #planned_event.event

Answer 2

its a routes error.instead of moving to create its moving to show action of controller.
remember:-
your create link should be post
your show action should be get(with id passed)
i think your view needs to be looked upon where you are clicking.check the link_to or submit button or your form_for