title: rails enum, load enum values based on condition is it possible?
body: <p>lets say i have a model with enum like this :</p>
  
  <pre><code>class Apt &lt; ActiveRecord::Base
    enum apt_status: [ :draft, :publish, :unpublish, :waiting ]
  
  end
  </code></pre>
  
  <p>and in my controller i load my enum like this :</p>
  
  <pre><code>@apt_statuses = Apt.apt_statuses
  </code></pre>
  
  <p>it's working fine, but what if i want to load my enum values based on user role? 
  so lets say if i am an admin i want to load all my enum values, and if i am not an admin, i only display 3 enum values </p>
  
  <blockquote>
    <p>":draft, :unpublish, :waiting"</p>
  </blockquote>
  
  <p>is it possible? please suggest. many thanks.</p>
  
  <p>btw here is my controller, i really have no idea how to fill my </p>
  
  <blockquote>
    <p>@apt_statuses</p>
  </blockquote>
  
  <p>in else condition</p>
  
  <pre><code>       ishaveprivilage = Usermaster.joins(:rolemasters, :rolemasters).where(id: @current_user.id, rolemasters: {name: "Super Admin"})
  
  
     if ishaveprivilage
          @apt_statuses = Apt.apt_statuses
     else
  
     end
  </code></pre>
  
  <p>i use my enum in view like this :</p>
  
  <pre><code> &lt;%= f.select :apt_status, options_for_select(@apt_statuses.collect { |s| [s[0].humanize, s[0]] }, selected: @apt.apt_status), {} , class: "form-control" %&gt;
  </code></pre>
  
  <p>error trace :</p>
  
  <pre><code>NoMethodError in Admin::Apts#new
  Showing C:/Users/lenovo/Documents/urbanace/urbanacecode/app/views/admin/apts/_form.html.erb where line #134 raised:
  
  undefined method `humanize' for :draft:Symbol
  Trace of template inclusion: app/views/admin/apts/new.html.erb
  
  Rails.root: C:/Users/lenovo/Documents/urbanace/urbanacecode
  
  Application Trace | Framework Trace | Full Trace
  app/views/admin/apts/_form.html.erb:134:in `block (2 levels) in _app_views_admin_apts__form_html_erb___8345113_90629556'
  app/views/admin/apts/_form.html.erb:134:in `each'
  app/views/admin/apts/_form.html.erb:134:in `collect'
  app/views/admin/apts/_form.html.erb:134:in `block in _app_views_admin_apts__form_html_erb___8345113_90629556'
  actionview (4.2.7) lib/action_view/helpers/capture_helper.rb:38:in `block in capture'
  actionview (4.2.7) lib/action_view/helpers/capture_helper.rb:202:in `with_output_buffer'
  actionview (4.2.7) lib/action_view/helpers/capture_helper.rb:38:in `capture'
  actionview (4.2.7) lib/action_view/helpers/form_helper.rb:444:in `form_for'
  app/views/admin/apts/_form.html.erb:57:in `_app_views_admin_apts__form_html_erb___8345113_90629556'
  actionview (4.2.7) lib/action_view/template.rb:145:in `block in render'
  activesupport (4.2.7) lib/active_support/notifications.rb:166:in `instrument'
  actionview (4.2.7) lib/action_view/template.rb:333:in `instrument'
  actionview (4.2.7) lib/action_view/template.rb:143:in `render'
  actionview (4.2.7) lib/action_view/renderer/partial_renderer.rb:339:in `render_partial'
  actionview (4.2.7) lib/action_view/renderer/partial_renderer.rb:310:in `block in render'
  actionview (4.2.7) lib/action_view/renderer/abstract_renderer.rb:39:in `block in instrument'
  activesupport (4.2.7) lib/active_support/notifications.rb:164:in `block in instrument'
  activesupport (4.2.7) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
  activesupport (4.2.7) lib/active_support/notifications.rb:164:in `instrument'
  actionview (4.2.7) lib/action_view/renderer/abstract_renderer.rb:39:in `instrument'
  actionview (4.2.7) lib/action_view/renderer/partial_renderer.rb:309:in `render'
  actionview (4.2.7) lib/action_view/renderer/renderer.rb:51:in `render_partial'
  actionview (4.2.7) lib/action_view/helpers/rendering_helper.rb:35:in `render'
  app/views/admin/apts/new.html.erb:2:in `_app_views_admin_apts_new_html_erb__809278863_96977256'
  actionview (4.2.7) lib/action_view/template.rb:145:in `block in render'
  activesupport (4.2.7) lib/active_support/notifications.rb:166:in `instrument'
  actionview (4.2.7) lib/action_view/template.rb:333:in `instrument'
  actionview (4.2.7) lib/action_view/template.rb:143:in `render'
  actionview (4.2.7) lib/action_view/renderer/template_renderer.rb:54:in `block (2 levels) in render_template'
  actionview (4.2.7) lib/action_view/renderer/abstract_renderer.rb:39:in `block in instrument'
  activesupport (4.2.7) lib/active_support/notifications.rb:164:in `block in instrument'
  activesupport (4.2.7) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
  activesupport (4.2.7) lib/active_support/notifications.rb:164:in `instrument'
  actionview (4.2.7) lib/action_view/renderer/abstract_renderer.rb:39:in `instrument'
  actionview (4.2.7) lib/action_view/renderer/template_renderer.rb:53:in `block in render_template'
  actionview (4.2.7) lib/action_view/renderer/template_renderer.rb:61:in `render_with_layout'
  actionview (4.2.7) lib/action_view/renderer/template_renderer.rb:52:in `render_template'
  actionview (4.2.7) lib/action_view/renderer/template_renderer.rb:14:in `render'
  actionview (4.2.7) lib/action_view/renderer/renderer.rb:46:in `render_template'
  actionview (4.2.7) lib/action_view/renderer/renderer.rb:27:in `render'
  actionview (4.2.7) lib/action_view/rendering.rb:100:in `_render_template'
  actionpack (4.2.7) lib/action_controller/metal/streaming.rb:217:in `_render_template'
  actionview (4.2.7) lib/action_view/rendering.rb:83:in `render_to_body'
  actionpack (4.2.7) lib/action_controller/metal/rendering.rb:32:in `render_to_body'
  actionpack (4.2.7) lib/action_controller/metal/renderers.rb:37:in `render_to_body'
  actionpack (4.2.7) lib/abstract_controller/rendering.rb:25:in `render'
  actionpack (4.2.7) lib/action_controller/metal/rendering.rb:16:in `render'
  actionpack (4.2.7) lib/action_controller/metal/instrumentation.rb:44:in `block (2 levels) in render'
  activesupport (4.2.7) lib/active_support/core_ext/benchmark.rb:12:in `block in ms'
  C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/benchmark.rb:303:in `realtime'
  activesupport (4.2.7) lib/active_support/core_ext/benchmark.rb:12:in `ms'
  actionpack (4.2.7) lib/action_controller/metal/instrumentation.rb:44:in `block in render'
  actionpack (4.2.7) lib/action_controller/metal/instrumentation.rb:87:in `cleanup_view_runtime'
  activerecord (4.2.7) lib/active_record/railties/controller_runtime.rb:25:in `cleanup_view_runtime'
  actionpack (4.2.7) lib/action_controller/metal/instrumentation.rb:43:in `render'
  remotipart (1.2.1) lib/remotipart/render_overrides.rb:14:in `render_with_remotipart'
  actionpack (4.2.7) lib/action_controller/metal/implicit_render.rb:10:in `default_render'
  actionpack (4.2.7) lib/action_controller/metal/implicit_render.rb:5:in `send_action'
  actionpack (4.2.7) lib/abstract_controller/base.rb:198:in `process_action'
  actionpack (4.2.7) lib/action_controller/metal/rendering.rb:10:in `process_action'
  actionpack (4.2.7) lib/abstract_controller/callbacks.rb:20:in `block in process_action'
  activesupport (4.2.7) lib/active_support/callbacks.rb:117:in `call'
  activesupport (4.2.7) lib/active_support/callbacks.rb:117:in `call'
  activesupport (4.2.7) lib/active_support/callbacks.rb:555:in `block (2 levels) in compile'
  activesupport (4.2.7) lib/active_support/callbacks.rb:505:in `call'
  activesupport (4.2.7) lib/active_support/callbacks.rb:505:in `call'
  activesupport (4.2.7) lib/active_support/callbacks.rb:92:in `__run_callbacks__'
  activesupport (4.2.7) lib/active_support/callbacks.rb:778:in `_run_process_action_callbacks'
  activesupport (4.2.7) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (4.2.7) lib/abstract_controller/callbacks.rb:19:in `process_action'
  actionpack (4.2.7) lib/action_controller/metal/rescue.rb:29:in `process_action'
  actionpack (4.2.7) lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
  activesupport (4.2.7) lib/active_support/notifications.rb:164:in `block in instrument'
  activesupport (4.2.7) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
  activesupport (4.2.7) lib/active_support/notifications.rb:164:in `instrument'
  actionpack (4.2.7) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
  actionpack (4.2.7) lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
  activerecord (4.2.7) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
  actionpack (4.2.7) lib/abstract_controller/base.rb:137:in `process'
  actionview (4.2.7) lib/action_view/rendering.rb:30:in `process'
  actionpack (4.2.7) lib/action_controller/metal.rb:196:in `dispatch'
  actionpack (4.2.7) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
  actionpack (4.2.7) lib/action_controller/metal.rb:237:in `block in action'
  actionpack (4.2.7) lib/action_dispatch/routing/route_set.rb:74:in `call'
  actionpack (4.2.7) lib/action_dispatch/routing/route_set.rb:74:in `dispatch'
  actionpack (4.2.7) lib/action_dispatch/routing/route_set.rb:43:in `serve'
  actionpack (4.2.7) lib/action_dispatch/journey/router.rb:43:in `block in serve'
  actionpack (4.2.7) lib/action_dispatch/journey/router.rb:30:in `each'
  actionpack (4.2.7) lib/action_dispatch/journey/router.rb:30:in `serve'
  actionpack (4.2.7) lib/action_dispatch/routing/route_set.rb:817:in `call'
  rack (1.6.4) lib/rack/etag.rb:24:in `call'
  rack (1.6.4) lib/rack/conditionalget.rb:25:in `call'
  rack (1.6.4) lib/rack/head.rb:13:in `call'
  remotipart (1.2.1) lib/remotipart/middleware.rb:27:in `call'
  actionpack (4.2.7) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
  actionpack (4.2.7) lib/action_dispatch/middleware/flash.rb:260:in `call'
  rack (1.6.4) lib/rack/session/abstract/id.rb:225:in `context'
  rack (1.6.4) lib/rack/session/abstract/id.rb:220:in `call'
  actionpack (4.2.7) lib/action_dispatch/middleware/cookies.rb:560:in `call'
  activerecord (4.2.7) lib/active_record/query_cache.rb:36:in `call'
  activerecord (4.2.7) lib/active_record/connection_adapters/abstract/connection_pool.rb:653:in `call'
  activerecord (4.2.7) lib/active_record/migration.rb:377:in `call'
  actionpack (4.2.7) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
  activesupport (4.2.7) lib/active_support/callbacks.rb:88:in `__run_callbacks__'
  activesupport (4.2.7) lib/active_support/callbacks.rb:778:in `_run_call_callbacks'
  activesupport (4.2.7) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (4.2.7) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  actionpack (4.2.7) lib/action_dispatch/middleware/reloader.rb:73:in `call'
  actionpack (4.2.7) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
  actionpack (4.2.7) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
  web-console (2.3.0) lib/web_console/middleware.rb:28:in `block in call'
  web-console (2.3.0) lib/web_console/middleware.rb:18:in `catch'
  web-console (2.3.0) lib/web_console/middleware.rb:18:in `call'
  actionpack (4.2.7) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
  railties (4.2.7) lib/rails/rack/logger.rb:38:in `call_app'
  railties (4.2.7) lib/rails/rack/logger.rb:20:in `block in call'
  activesupport (4.2.7) lib/active_support/tagged_logging.rb:68:in `block in tagged'
  activesupport (4.2.7) lib/active_support/tagged_logging.rb:26:in `tagged'
  activesupport (4.2.7) lib/active_support/tagged_logging.rb:68:in `tagged'
  railties (4.2.7) lib/rails/rack/logger.rb:20:in `call'
  actionpack (4.2.7) lib/action_dispatch/middleware/request_id.rb:21:in `call'
  rack (1.6.4) lib/rack/methodoverride.rb:22:in `call'
  rack (1.6.4) lib/rack/runtime.rb:18:in `call'
  activesupport (4.2.7) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
  rack (1.6.4) lib/rack/lock.rb:17:in `call'
  actionpack (4.2.7) lib/action_dispatch/middleware/static.rb:120:in `call'
  rack (1.6.4) lib/rack/sendfile.rb:113:in `call'
  railties (4.2.7) lib/rails/engine.rb:518:in `call'
  railties (4.2.7) lib/rails/application.rb:165:in `call'
  rack (1.6.4) lib/rack/lock.rb:17:in `call'
  rack (1.6.4) lib/rack/content_length.rb:15:in `call'
  rack (1.6.4) lib/rack/handler/webrick.rb:88:in `service'
  C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/webrick/httpserver.rb:138:in `service'
  C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/webrick/httpserver.rb:94:in `run'
  C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread'
  Request
  
  Parameters:
  
  None
  Toggle session dump
  _csrf_token: "DK6t1OuVBdMWZLihVgktZFIQSo7gX3qt5Iq5ZHyA7lM="
  session_id: "2391dc6faaafcd52ee1815ccbe115daf"
  user_id: 7
  Toggle env dump
  GATEWAY_INTERFACE: "CGI/1.1"
  HTTP_ACCEPT: "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8"
  HTTP_ACCEPT_ENCODING: "gzip, deflate, sdch"
  HTTP_ACCEPT_LANGUAGE: "en-US,en;q=0.8"
  HTTP_CACHE_CONTROL: "max-age=0"
  REMOTE_ADDR: "127.0.0.1"
  REMOTE_HOST: "127.0.0.1"
  SERVER_NAME: "localhost"
  SERVER_PROTOCOL: "HTTP/1.1"
  Response
  
  Headers:
  
  None
  x
  &gt;&gt;   
  </code></pre>