Just as I was reading it on the wiki you mentioned it.

Thanks,

Andrew


On Feb 3, 12:28 pm, Kenneth Ortmann <[email protected]> wrote:
> Try adding all of your virtual columns as non action-specific columns at the
> top of your controller
>
> config.columns << :will_study_require_irb_approval
>
> You added it as an "update" column but not to the core columns, and then you
> are doing config.columns[:will_study_require_irb_approval].label = 'blah'
> ~Kenny
>
> On Wed, Feb 3, 2010 at 11:15 AM, Andrew Cates <[email protected]> wrote:
> > I've defined a virtual column and when I try to set it's label I get
> > "undefined method `label=' for nil:NilClass"
>
> > Here is my model:
>
> > class FundingApplication < ActiveRecord::Base
> >  acts_as_paranoid
> >  belongs_to :grant_category
> >  belongs_to :application_type
>
> >  has_many :people, :order => :person_type_id
> >  has_one  :business_manager, :conditions => ["person_type_id = ?",
> > PersonType.business_manager], :class_name => 'Person'
> >  has_one  :optional_contact, :conditions => ["person_type_id = ?",
> > PersonType.optional_contact], :class_name => 'Person'
> >  has_many :co_investigators, :conditions => ["person_type_id = ?",
> > PersonType.co_investigator], :class_name => 'Person'
> >  has_one  :principal_investigator, :conditions => ["person_type_id
> > = ?", PersonType.principal_investigator], :class_name => 'Person'
>
> >  mount_uploader :abstract, AttachmentUploader
> >  mount_uploader :pre_proposal, AttachmentUploader
>
> > validates_presence_of :project_title, :amount_requested,
> > :grant_category_id, :application_type, :abstract, :pre_proposal
> >  validates_numericality_of :amount_requested, :greater_than =>
> > 0, :less_than_or_equal_to => 50000
>
> > validates_inclusion_of :will_study_require_irb_approval,
> > :will_study_require_iacuc_approval, :has_child_health_component_to_research,
> > :in
> > => [true, false]
>
> > validates_length_of :worked_with_co_investigator_explaination, :maximum
> > => 250, :tokenizer => lambda {|str| str.scan(/\w+/)}, :too_long => "is
> > too long (maximum is {{count}} words)"
>
> >  accepts_nested_attributes_for :people
>
> >  def self.yes_no
> >    {
> >      1 => 'Yes',
> >      0 => 'No',
> >      true => 'Yes',
> >      false => 'No'
> >    }
> >  end
>
> >  def pi_first_name
> >    principal_investigator.first_name
> >  end
>
> >  def pi_last_name
> >    principal_investigator.last_name
> >  end
>
> > end
>
> > and here is the AS controller:
>
> > class Admin::PilotPreApplicationsController < ApplicationController
> >  include ApplicationDownloader
>
> >  layout 'admin'
>
> >  active_scaffold :pilot_pre_application do |config|
> >    config.label = "Pilot Pre Applications"
>
> >    config.create.link = false
> >    config.update.multipart = true
> >    #config.list.always_show_search = true
> >    #config.actions.swap :search, :live_search
>
> >    config.action_links.add "Download", :controller =>
> > 'pilot_pre_applications', :action => 'download', :type
> > => :record, :inline => false
>
> >    config.list.columns =
> > [ :pi_first_name, :project_title, :amount_requested, :grant_category,
> > :created_at ]
>
> >    config.show.columns =
> > [ :project_title, :grant_category, :amount_requested,
> > :will_study_require_irb_approval, :has_irb_approval,
> >                           :will_study_require_iacuc_approval,
> > :has_iacuc_approval, :worked_with_co_investigator_explaination,
> > :has_child_health_component_to_research,
> >                           :principal_investigator, :business_manager,
> > :optional_contact, :co_investigators, :abstract, :pre_proposal,
> >                           :created_at, :updated_at ]
>
> >    config.update.columns =
> > [ :project_title, :grant_category, :amount_requested,
> > :will_study_require_irb_approval, :has_irb_approval,
> >                           :will_study_require_iacuc_approval,
> > :has_iacuc_approval, :worked_with_co_investigator_explaination,
> > :has_child_health_component_to_research,
> >                           :abstract, :pre_proposal, :people,
> >                           :created_at, :updated_at ]
>
> >    config.columns.each { |column| column.label =
> > column.label.titleize }
>
> >    config.columns[:people].show_blank_record = false
> >    config.columns[:grant_category].clear_link
>
> >    config.columns[:will_study_require_irb_approval].label = "Requires
> > IRB Approval?"
> >    config.columns[:will_study_require_iacuc_approval].label =
> > "Requires IACUC Approval?"
> >    config.columns[:has_irb_approval].label = "Has IRB Approval?"
> >    config.columns[:has_iacuc_approval].label = "Has IACUC Approval?"
> >    config.columns[:has_child_health_component_to_research].label =
> > "Has Child Health Component?"
> >    config.columns[:pi_first_name].label = "This"
>
> >    config.columns[:will_study_require_irb_approval].form_ui
> > = :checkbox
> >    config.columns[:will_study_require_iacuc_approval].form_ui
> > = :checkbox
> >    config.columns[:has_irb_approval].form_ui = :checkbox
> >    config.columns[:has_iacuc_approval].form_ui = :checkbox
> >    config.columns[:has_child_health_component_to_research].form_ui
> > = :checkbox
> >    config.columns[:grant_category].form_ui = :select
> >    config.columns[:created_at].form_ui = :calendar_date_select
> >    config.columns[:updated_at].form_ui = :calendar_date_select
>
> >    config.columns[:created_at].label = "Submitted"
> >    config.columns[:updated_at].label = "Updated"
> >  end
>
> > end
>
> > The error happens on line 39 of the controller
>
> > Here is the error:
>
> > undefined method `label=' for nil:NilClass
>
> > Here is the full backtrace:
>
> > /Users/amcates/Projects/pilot_project/vendor/rails/activesupport/lib/
> > active_support/whiny_nil.rb:52:in `method_missing'
> > /Users/amcates/Projects/pilot_project/app/controllers/admin/
> > pilot_pre_applications_controller.rb:39
> > /Users/amcates/Projects/pilot_project/vendor/plugins/active_scaffold/
> > lib/active_scaffold/configurable.rb:11:in `instance_exec'
> > /Users/amcates/Projects/pilot_project/vendor/plugins/active_scaffold/
> > lib/active_scaffold/configurable.rb:11:in `configure'
> > /Users/amcates/Projects/pilot_project/vendor/plugins/active_scaffold/
> > lib/active_scaffold.rb:61:in `active_scaffold'
> > /Users/amcates/Projects/pilot_project/app/controllers/admin/
> > pilot_pre_applications_controller.rb:6
> > /Users/amcates/Projects/pilot_project/vendor/rails/activesupport/lib/
> > active_support/dependencies.rb:380:in
> > `load_without_new_constant_marking'
> > /Users/amcates/Projects/pilot_project/vendor/rails/activesupport/lib/
> > active_support/dependencies.rb:380:in `load_file'
> > /Users/amcates/Projects/pilot_project/vendor/rails/activesupport/lib/
> > active_support/dependencies.rb:521:in `new_constants_in'
> > /Users/amcates/Projects/pilot_project/vendor/rails/activesupport/lib/
> > active_support/dependencies.rb:379:in `load_file'
> > /Users/amcates/Projects/pilot_project/vendor/rails/activesupport/lib/
> > active_support/dependencies.rb:259:in `require_or_load'
> > /Users/amcates/Projects/pilot_project/vendor/rails/activesupport/lib/
> > active_support/dependencies.rb:425:in `load_missing_constant'
> > /Users/amcates/Projects/pilot_project/vendor/rails/activesupport/lib/
> > active_support/dependencies.rb:80:in `const_missing'
> > /Users/amcates/Projects/pilot_project/vendor/rails/activesupport/lib/
> > active_support/inflector.rb:361:in `constantize'
> > /Users/amcates/Projects/pilot_project/vendor/rails/activesupport/lib/
> > active_support/inflector.rb:360:in `each'
> > /Users/amcates/Projects/pilot_project/vendor/rails/activesupport/lib/
> > active_support/inflector.rb:360:in `constantize'
> > /Users/amcates/Projects/pilot_project/vendor/rails/activesupport/lib/
> > active_support/core_ext/string/inflections.rb:162:in `constantize'
> > /Users/amcates/Projects/pilot_project/vendor/rails/actionpack/lib/
> > action_controller/routing/route_set.rb:443:in `recognize'
> > /Users/amcates/Projects/pilot_project/vendor/rails/actionpack/lib/
> > action_controller/routing/route_set.rb:436:in `call'
> > /Users/amcates/Projects/pilot_project/vendor/rails/actionpack/lib/
> > action_controller/dispatcher.rb:87:in `dispatch'
> > /Users/amcates/Projects/pilot_project/vendor/rails/actionpack/lib/
> > action_controller/dispatcher.rb:121:in `_call'
> > /Users/amcates/Projects/pilot_project/vendor/rails/actionpack/lib/
> > action_controller/dispatcher.rb:130:in `build_middleware_stack'
> > /Users/amcates/Projects/pilot_project/vendor/rails/activerecord/lib/
> > active_record/query_cache.rb:29:in `call'
> > /Users/amcates/Projects/pilot_project/vendor/rails/activerecord/lib/
> > active_record/query_cache.rb:29:in `call'
> > /Users/amcates/Projects/pilot_project/vendor/rails/activerecord/lib/
> > active_record/connection_adapters/abstract/query_cache.rb:34:in
> > `cache'
> > /Users/amcates/Projects/pilot_project/vendor/rails/activerecord/lib/
> > active_record/query_cache.rb:9:in `cache'
> > /Users/amcates/Projects/pilot_project/vendor/rails/activerecord/lib/
> > active_record/query_cache.rb:28:in `call'
> > /Users/amcates/Projects/pilot_project/vendor/rails/activerecord/lib/
> > active_record/connection_adapters/abstract/connection_pool.rb:361:in
> > `call'
> > /Users/amcates/Projects/pilot_project/vendor/rails/actionpack/lib/
> > action_controller/string_coercion.rb:25:in `call'
> > /Library/Ruby/Gems/1.8/gems/rack-1.0.1/lib/rack/head.rb:9:in `call'
> > /Library/Ruby/Gems/1.8/gems/rack-1.0.1/lib/rack/methodoverride.rb:
> > 24:in `call'
> > /Users/amcates/Projects/pilot_project/vendor/rails/actionpack/lib/
> > action_controller/params_parser.rb:15:in `call'
> > /Users/amcates/Projects/pilot_project/vendor/rails/actionpack/lib/
> > action_controller/session/cookie_store.rb:93:in `call'
> > /Users/amcates/Projects/pilot_project/vendor/rails/actionpack/lib/
> > action_controller/failsafe.rb:26:in `call'
> > /Library/Ruby/Gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in `call'
> > /Library/Ruby/Gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in
> > `synchronize'
> > /Library/Ruby/Gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in `call'
> > /Users/amcates/Projects/pilot_project/vendor/rails/actionpack/lib/
> > action_controller/dispatcher.rb:114:in `call'
> > /Users/amcates/Projects/pilot_project/vendor/rails/actionpack/lib/
> > action_controller/reloader.rb:34:in `run'
>
> ...
>
> read more »

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