Ruby On Rails callbacks don't work on Heroku, but work locally -

i've been working on school appplication using rails_admin. working fine locally when push heroku callbacks defined in models not used, not simple. come asking if has encountered problem before or me interpret logs because cannot find reason this.

first, gemfile looks like:

source 'https://rubygems.org'  ruby '2.2.0'  group :development, :test     gem 'railroady' end  # documenting models automatically gem 'annotate', '~> 2.6.6'  # styling html using sass gem 'bourbon' gem 'neat' gem 'bitters'  # using creating sql triggers inside models gem 'hairtrigger'  # creating seed data files existing data in database gem 'seed_dump'  # used translations of mailer , account confirmations gem 'devise-i18n'  # user permissions , login gem 'devise' gem 'cancancan', '~> 1.10' gem "rolify" gem "figaro" gem "rails_admin"  # bundle edge rails instead: gem 'rails', github: 'rails/rails' gem 'rails', '4.2.1' # use sqlite3 database active record on development environment gem 'sqlite3', group: :development # use postgresql database active record on production environment gem 'pg', group: :production # use scss stylesheets gem 'sass-rails', '~> 5.0' # use uglifier compressor javascript assets gem 'uglifier', '>= 1.3.0' # use coffeescript .js.coffee assets , views gem 'coffee-rails', '~> 4.1.0' # see https://github.com/sstephenson/execjs#readme more supported runtimes # gem 'therubyracer',  platforms: :ruby  # use jquery javascript library gem 'jquery-rails' # turbolinks makes following links in web application faster. read more: https://github.com/rails/turbolinks gem 'turbolinks' # build json apis ease. read more: https://github.com/rails/jbuilder gem 'jbuilder', '~> 2.0' # bundle exec rake doc:rails generates api under doc/api. gem 'sdoc', '~> 0.4.0',          group: :doc  # spring speeds development keeping application running in background. read more: https://github.com/rails/spring gem 'spring', group: :development gem 'rails_12factor', group: :production 

and models i'm using callbacks in:

region.rb

# == schema information # # table name: regions # #  id         :integer          not null, primary key #  name       :varchar #  key        :varchar #  created_at :datetime         not null #  updated_at :datetime         not null #  class region < activerecord::base   has_many :events, :dependent => :destroy, :inverse_of => :region   has_and_belongs_to_many :staff_members    before_create :generate_key    rails_admin     visible       bindings[:controller].current_user.roles.first.name == "super_admin"     end      list       field :id       field :name       field :key     end      edit       field :name         required true         "por favor llena este campo."       end     end   end    private     def generate_key       self.key = self.name[0..1]     end end 

team.rb

# == schema information # # table name: teams # #  id                   :integer          not null, primary key #  name                 :varchar #  key                  :varchar #  date_of_registration :date #  company_name         :varchar #  category_id          :integer #  address_id           :integer #  created_at           :datetime         not null #  updated_at           :datetime         not null #  winner               :boolean #  class team < activerecord::base   belongs_to :category, :inverse_of => :teams   belongs_to :address, :inverse_of => :teams   has_many :evaluations, :dependent => :destroy, :inverse_of => :team   has_many :team_members, :dependent => :destroy, :inverse_of => :team   has_and_belongs_to_many :events    before_save :generate_key    def team_label_method     "#{self.key} - #{self.name}"   end    rails_admin     object_label_method       :team_label_method     end      list       field :id         column_width 40       end       field :name         column_width 100       end       field :key         column_width 90       end       field :company_name         column_width 100       end       field :category         column_width 70       end       field :events         column_width 100       end       field :winner         column_width 10       end       field :address         column_width 50       end     end      edit       field :name         required true         "por favor llena este campo."       end       #field :key       #  required true       #  "por favor llena este campo."       #end       field :company_name         required true         "por favor llena este campo."       end       field :category         required true         "por favor llena este campo."       end       field :winner         default_value = false         "llenar sólo si este equipo es ganador del concurso nacional."       end       field :address         required true         "por favor llena este campo."       end       field :team_members       field :events         required true         "por favor llena este campo."       end       field :date_of_registration         required true         "por favor llena este campo."       end     end   end    private     def generate_key       standing = "r"       self.events.each |current_event|         if current_event.event_type == "nacional"           standing = "n"         end       end       if self.winner == true         standing = "g"       end        region_key = self.events.last.region.key       year = self.date_of_registration.year       id = self.id.to_s.rjust(3, '0')       category = self.category.key       special = 0        case self.category.key         when "s1"           special = 1         when "s2"           special = 2         when "s3"           special = 3         when "s4"           special = 4       end        self.key = "#{standing}#{region_key}#{year}#{id}#{category}#{special}".upcase     end end 

this logs on heroku when try create new region:

2015-06-02t21:05:45.566768+00:00 heroku[router]: at=info method=get path="/admin/region?_pjax=%5bdata-pjax-container%5d" host=sistema-de-evaluaciones-amte.herokuapp.com request_id=887af50d-bfb8-4a96-889d-e858d980838e fwd="189.241.62.189" dyno=web.1 connect=1ms service=415ms status=200 bytes=11925 2015-06-02t21:05:45.512300+00:00 app[web.1]:   rendered vendor/bundle/ruby/2.2.0/gems/rails_admin-0.6.7/app/views/rails_admin/main/index.html.haml within layouts/rails_admin/pjax (296.2ms) 2015-06-02t21:05:45.548529+00:00 app[web.1]: completed 200 ok in 360ms (views: 321.1ms | activerecord: 22.2ms) 2015-06-02t21:05:47.282570+00:00 heroku[router]: at=info method=get path="/admin/region/new?_pjax=%5bdata-pjax-container%5d" host=sistema-de-evaluaciones-amte.herokuapp.com request_id=d8566b9a-943a-4265-afd2-6f339c52c633 fwd="189.241.62.189" dyno=web.1 connect=2ms service=59ms status=200 bytes=3960 2015-06-02t21:05:47.224731+00:00 app[web.1]: processing railsadmin::maincontroller#new html 2015-06-02t21:05:47.260190+00:00 app[web.1]:   rendered vendor/bundle/ruby/2.2.0/gems/rails_admin-0.6.7/app/views/rails_admin/main/_submit_buttons.html.haml (12.7ms) 2015-06-02t21:05:47.224784+00:00 app[web.1]:   parameters: {"_pjax"=>"[data-pjax-container]", "model_name"=>"region"} 2015-06-02t21:05:47.272787+00:00 app[web.1]: completed 200 ok in 48ms (views: 34.2ms | activerecord: 3.7ms) 2015-06-02t21:05:47.245920+00:00 app[web.1]:   rendered vendor/bundle/ruby/2.2.0/gems/rails_admin-0.6.7/app/views/rails_admin/main/_form_field.html.haml (1.3ms) 2015-06-02t21:05:47.222221+00:00 app[web.1]: started "/admin/region/new?_pjax=%5bdata-pjax-container%5d" 189.241.62.189 @ 2015-06-02 21:05:47 +0000 2015-06-02t21:05:47.260810+00:00 app[web.1]:   rendered vendor/bundle/ruby/2.2.0/gems/rails_admin-0.6.7/app/views/rails_admin/main/new.html.haml within layouts/rails_admin/pjax (21.0ms) 2015-06-02t21:05:50.197718+00:00 app[web.1]: started post "/admin/region/new" 189.241.62.189 @ 2015-06-02 21:05:50 +0000 2015-06-02t21:05:50.336844+00:00 app[web.1]: processing railsadmin::maincontroller#index html 2015-06-02t21:05:50.336854+00:00 app[web.1]:   parameters: {"model_name"=>"region"} 2015-06-02t21:05:50.447221+00:00 app[web.1]:   rendered vendor/bundle/ruby/2.2.0/gems/rails_admin-0.6.7/app/views/rails_admin/main/index.html.haml within layouts/rails_admin/application (96.7ms) 2015-06-02t21:05:50.199887+00:00 app[web.1]: processing railsadmin::maincontroller#new html 2015-06-02t21:05:50.199969+00:00 app[web.1]:   parameters: {"utf8"=>"✓", "authenticity_token"=>"jajkjulqhu2i1z0io6pmde/nzkzb1ka2hgwl8dyaucb22tyfftstrnop57hktf2ye0dxs1snbzt/wqgohwn+6w==", "region"=>{"name"=>"prueba"}, "return_to"=>"https://sistema-de-evaluaciones-amte.herokuapp.com/admin/region", "_save"=>"", "model_name"=>"region"} 2015-06-02t21:05:50.224054+00:00 app[web.1]: redirected https://sistema-de-evaluaciones-amte.herokuapp.com/admin/region 2015-06-02t21:05:50.224993+00:00 app[web.1]: completed 302 found in 24ms (activerecord: 10.2ms) 2015-06-02t21:05:50.334556+00:00 app[web.1]: started "/admin/region" 189.241.62.189 @ 2015-06-02 21:05:50 +0000 2015-06-02t21:05:50.240345+00:00 heroku[router]: at=info method=post path="/admin/region/new" host=sistema-de-evaluaciones-amte.herokuapp.com request_id=346211ad-fcf1-4012-9239-3884d01ff0a3 fwd="189.241.62.189" dyno=web.1 connect=1ms service=42ms status=302 bytes=1218 2015-06-02t21:05:50.454815+00:00 app[web.1]:   rendered vendor/bundle/ruby/2.2.0/gems/rails_admin-0.6.7/app/views/layouts/rails_admin/_navigation.html.haml (5.5ms) 2015-06-02t21:05:50.454724+00:00 app[web.1]:   rendered vendor/bundle/ruby/2.2.0/gems/rails_admin-0.6.7/app/views/layouts/rails_admin/_secondary_navigation.html.haml (4.9ms) 2015-06-02t21:05:50.485504+00:00 app[web.1]:   rendered vendor/bundle/ruby/2.2.0/gems/rails_admin-0.6.7/app/views/layouts/rails_admin/pjax.html.haml (10.2ms) 2015-06-02t21:05:50.486076+00:00 app[web.1]: completed 200 ok in 149ms (views: 114.7ms | activerecord: 24.4ms) 2015-06-02t21:05:50.502507+00:00 heroku[router]: at=info method=get path="/admin/region" host=sistema-de-evaluaciones-amte.herokuapp.com request_id=e2439dad-9f8d-407b-b3c8-5229bad08b58 fwd="189.241.62.189" dyno=web.1 connect=6ms service=167ms status=200 bytes=16948 

and see when same in local server, can see, in post block clear "key" element argument insert query.

started post "/admin/region/new" 127.0.0.1 @ 2015-06-02 16:10:18 -0500 processing railsadmin::maincontroller#new html   parameters: {"utf8"=>"✓", "authenticity_token"=>"r8fqgzosomw4c3p/al/byeqeiy+bnbam0wpcdnzypf+n0v1yentdulxe/aft5jbvaljfkvmfubfkiqipxsx1qw==", "region"=>{"name"=>"prueba"}, "return_to"=>"http://localhost:3000/admin/region", "_save"=>"", "model_name"=>"region"}   user load (0.2ms)  select  "users".* "users" "users"."id" = ?  order "users"."id" asc limit 1  [["id", 1]]   role load (0.2ms)  select "roles".* "roles" inner join "users_roles" on "roles"."id" = "users_roles"."role_id" "users_roles"."user_id" = ? , (((roles.name = 'super_admin') , (roles.resource_type null) , (roles.resource_id null)))  [["user_id", 1]]   role load (0.3ms)  select  "roles".* "roles" inner join "users_roles" on "roles"."id" = "users_roles"."role_id" "users_roles"."user_id" = ?  order "roles"."id" asc limit 1  [["user_id", 1]]    (0.3ms)  begin transaction   sql (0.6ms)  insert "regions" ("name", "created_at", "updated_at", "key") values (?, ?, ?, ?)  [["name", "prueba"], ["created_at", "2015-06-02 21:10:18.391401"], ["updated_at", "2015-06-02 21:10:18.391401"], ["key", "pr"]]    (150.7ms)  commit transaction redirected http://localhost:3000/admin/region completed 302 found in 175ms (activerecord: 152.2ms) 

i found error! had sql trigger else on team directly created on postgresql database on heroku on earlier stage of development because being called @ same time callback, once dropped started work intended.