ActionController::ParameterMissing (param is missing or the value is empty: film): - ruby-on-rails

Question

So, I'm getting the following error when trying to visit the films page on my app:
ActionController::ParameterMissing (param is missing or the value is empty: film):
2014-07-24T22:04:44.622356+00:00 app[web.1]: app/controllers/saas_admin/films_controller.rb:54:in `permitted_params'
See my films controller code below
films_controller.rb
class SaasAdmin::FilmsController < SaasAdminController
inherit_resources
belongs_to :studio, :finder => :find_by_id!, :param => :studio_id, :class_name => Studio
before_filter :set_sort_fields, :only => :edit
before_filter :build_collections, :only => [:new, :create, :edit, :update]
def create
create! { parent_path(parent.id) } # Redirect to studio in case studio_id is changed
end
def update
#film = Film.find_by_permalink(params[:id])
respond_to do |format|
if #film.update(permitted_params)
format.html { redirect_to saas_admin_studio_path(#film.studio), notice: 'Film was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: 'edit' }
format.json { render json: #film.errors, status: :unprocessable_entity }
end
end
end
def index
redirect_to parent_path(parent.id)
end
def show
#clips = resource.clips.paginate(:page => params[:page], :per_page => 30, :order => 'clips.position')
end
protected
def resource
# #film ||= end_of_association_chain.find_by_permalink!(params[:id])
#film ||= end_of_association_chain.find_by_permalink!(params[:id])
end
def collection
#films ||= end_of_association_chain.paginate(:page => params[:page], :per_page => 30, :order => 'films.created_at')
end
def set_sort_fields
resource.sort_name = '' if resource.name == resource.sort_name
end
def build_collections
#studios ||= Studio.find(:all)
end
def permitted_params
params.require(:film).permit(:name, :sort_name, :description, :short_description, :meta_data,
:poster, :amazon_link, :active, :trackable, :country_ids => [])
end
end
What might this be? I've been trying to figure it out for a bit but perhaps a fresh set of eyes will find it's something rather simple.
Cheers!
Edit
Here's the view code for films/new.html.erb
<h1><%= #page_title = "New #{resource_class}" %></h1>
<%= form_for resource, :url => collection_path, :html => { :multipart => true } do |f| -%>
<%= render :partial => "form", :locals => { :f => f } %>
<% end -%>
<% content_for :sidebar do %>
<%= render :partial => "saas_admin/shared/sidebar" %>
<% end %>
and films/edit.html.erb
<h1><%= #page_title = "Edit #{resource_class}" %></h1>
<%= form_for resource, :url => saas_admin_studio_film_path(parent, resource), :html => { :multipart => true } do |f| -%>
<%= render :partial => "form", :locals => { :f => f } %>
<% end -%>
<% content_for :sidebar do %>
<%= render :partial => "saas_admin/shared/sidebar" %>
<% end %>
Edit 2
For reference here is how the permitted params was defined when it was working:
def permitted_params
{:film => params.fetch(:film, {}).permit(
:name, :sort_name, :description, :short_description, :meta_data,
:poster, :amazon_link, :active, :trackable)}
end

Answer 1

I have got this problem too when I use Angular JS form to send data to backend Rails 4. When I did not fill anything in angular js form, the error will show ActionController::ParameterMissing (param is missing or the value is empty:.
I fix it by adding params.fetch(:film, {}) the strong parameter into:
params.fetch(:film, {}).permit(:name, :sort_name, :description, :short_description, :meta_data,
:poster, :amazon_link, :active, :trackable, :country_ids => [])
I refer to code example to avoid ActionController::ParameterMissing (param is missing or the value is empty: film)
I hope this will help you.

Answer 2

Why not use so:
def creation_params
params.permit(:film)
end
It working for me! ;)

Answer 3

This is happening because you have specified to require 'film' in your parameters through strong_params (specified above in your permitted_params code).
Whatever the view side is doing (whether its a link or a form/etc.), its not passing its parameters nested under 'film'
eg.) if you were to raise params.inspect in the controller action, you would see that there is no node for "film".
Most likely what is wrong is that the form code you have on the view side is not set to nest these parameters properly, are you using a form_tag for example?