ActionController::ParameterMissing (param is missi

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

Why not use so:

def creation_params
params.permit(:film)
end

It working for me! ;)

Answer 2

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?

Answer 3

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.