Podio Ruby Rails shows "nomethoderror" - ruby-on-rails

Question

I'm having problems with the Podio_rails_sample. I've included my leadsController and leads.rb files. The line that gets hung up is field['config']['settings']['allowed_values'].
Line 25 is the problematic one:
NoMethodError in LeadsController#new
undefined method `[]' for nil:NilClass
Extracted source (around line #25):
23 app = Podio::Application.find(APP_ID)
24 field = app.fields.find { |field| field['external_id'] == 'status' }
25 field['config']['settings']['allowed_values']
26 end
27
28 def self.create_from_params(params)
Rails.root: c:/Sites/podio_rails_sample
app = Podio::Application.find(APP_ID)
field = app.fields.find { |field| field['external_id'] == 'status' }
field['config']['settings']['allowed_values']
end
def self.create_from_params(params)
Rails.root: c:/Sites/podio_rails_sample
-----------------------------------
class LeadsController < ApplicationController
before_filter :load_collections, :only => [:new, :edit]
def index
#leads = Lead.all
end
def new
#lead = Lead.new
end
def create
Lead.create_from_params(params['lead'])
redirect_to leads_path, :notice => 'Lead created'
end
def edit
#lead = Lead.find_basic(params[:id])
end
def update
Lead.update_from_params(params[:id], params['lead'])
redirect_to leads_path, :notice => 'Lead updated'
end
def destroy
Lead.delete(params[:id])
redirect_to leads_path, :notice => 'Lead deleted'
end
#protected
def load_collections
#lead_contacts = Lead.space_contacts
#sales_contacts = Lead.users
#statuses = Lead.statuses
end
end
-------------------------------------
- leads.rb file
class Lead < Podio::Item
APP_ID =12328033
SPACE_ID =3204114
# Find all items in the Leads app
def self.all
collection = self.find_all(APP_ID)
collection[:all]
end
# Find valid lead contacts in the space
def self.space_contacts
Podio::Contact.find_all_for_space(SPACE_ID, :order => 'contact', :limit => 12, :contact_type => 'space,connection', :exclude_self => false) rescue []
end
# Find valid sales contacts in the space
def self.users
Podio::Contact.find_all_for_space(SPACE_ID, :order => 'contact', :limit => 12, :contact_type => 'user', :exclude_self => false) rescue []
end
# Find valid statuses
def self.statuses
app = Podio::Application.find(APP_ID)
field = app.fields.find { |field| field['external_id'] == 'status' }
field['config']['settings']['allowed_values']
end
def self.create_from_params(params)
# raise fields.inspect
self.create(APP_ID, { :fields => fields_from_params(params) })
end
def self.update_from_params(id, params)
self.update(id, { :fields => fields_from_params(params) })
end
#
# Map the field values return by the Podio API to simple getters
#
def organization
field_values_by_external_id('company-or-organisation', :simple => true)
end
def lead_contact
field_values_by_external_id('contacts', :simple => true).try(:[], 'name')
end
def sales_contact
field_values_by_external_id('sales-contact', :simple => true).try(:[], 'name')
end
def potential_revenue_value
field_values_by_external_id('potential-revenue').try(:first).try(:[], 'value').to_i
end
def potential_revenue_currency
field_values_by_external_id('potential-revenue').try(:first).try(:[], 'currency')
end
def probability
field_values_by_external_id('probability-of-sale', :simple => true)
end
def status
field_values_by_external_id('status', :simple => true)
end
def followup_at
field_values_by_external_id('next-follow-up').try(:first).try(:[], 'start').try(:to_datetime)
end
protected
def field_values_by_external_id(external_id, options = {})
if self.fields.present?
field = self.fields.find { |field| field['external_id'] == external_id }
if field
values = field['values']
if options[:simple]
values.first['value']
else
values
end
else
nil
end
else
nil
end
end
def self.fields_from_params(params)
{
'company-or-organisation' => params[:organization],
'contacts' => (params[:lead_contact].present? ? params[:lead_contact].to_i : nil),
'sales-contact' => (params[:sales_contact].present? ? params[:sales_contact].to_i : nil),
'potential-revenue' => { :value => params['potential_revenue_value'], :currency => params['potential_revenue_currency'] },
'probability-of-sale' => params[:probability].to_i,
'status' => params[:status],
'next-follow-up' => DateTime.new(params['followup_at(1i)'].to_i, params['followup_at(2i)'].to_i, params['followup_at(3i)'].to_i).to_s(:db)
}.delete_if { |k, v| v.nil? }
end
end