Hi all, I am trying to reproduce rails 3.2 behaviour with fields_for and
nested attributes.
class ControllerAction < ActiveRecord::Base
has_many :interactions, dependent: :destroy
has_many :roles, through: :interactions
scope :controllers, lambda {|name| where("controller_name_id = ?",
name)}
scope :actions, lambda {|name| where("action_name_id = ?", name)}
def initialized_interactions() # this is the key method
[].tap do |o|
Role.all.each do |r|
if p = interactions.find { |p| p.role_id == r.id }
o << p.tap { |p| p.enable ||= true }
else
o << Interaction.new(:role_id => r.id)
end
end
end
end
end
class Role < ActiveRecord::Base
has_many :interactions
end
class Interaction < ActiveRecord::Base
belongs_to :controller_action
belongs_to :role
attr_accessor :enable # nice little thingy here
# It is now recommended to use strong params instead of
'attr_accessible :enable, :controller_action_id, :role_id'
end
controller_actions_controller.rb
...
private
# Use callbacks to share common setup or constraints between
actions.
def set_controller_action
@controller_action = ControllerAction.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the
white list through.
def controller_action_params
params.require(:controller_action).permit!
end
controller_actions view - excluding error code and most css formatting.
_form.rb
<%= form_for(@controller_action) do |f| %>
...
<%= f.label :name %><br />
<%= f.text_field :name %>
<h2><%= f.label :role %></h2>
<%= f.fields_for :interactions,
@controller_action.initialized_interactions() do |builder| %>
<% role = builder.object.role %>
<%= builder.hidden_field :role_id %>
<%= builder.check_box :enable %>
<%= builder.label :enable, role.name %>
<% end %>
<%= f.submit %>
<% end %>
Under rails 3.2.11 I get a form that allows the user to edit roles.
Editing controller_action
Name
Roles
Webmaster
Admin
Moderator
Editor
Registered User
Guest
Show <http://localhost:3200/controller_actions/1> |
Back<http://localhost:3200/controller_actions>
Under Rails 4.0 you get:-
undefined method `role' for #<Array:0xb875d4c>
Extracted source (around line *#21*):
18192021222324
<div>
<h2><%= f.label :role %></h2>
<%= f.fields_for :interactions,
@controller_action.initialized_interactions() do |builder| %>
<% role = builder.object.role %>
<%= builder.hidden_field :role_id %>
<div class="field">
Trace of template inclusion: app/views/controller_actions/edit.html.erb
Rails.root: /home/john/RubyMineProjects/Rails/4.0/urps2
Application Trace <http://localhost:3100/controller_actions/1/edit#> |
Framework
Trace <http://localhost:3100/controller_actions/1/edit#> | Full
Trace<http://localhost:3100/controller_actions/1/edit#>
app/views/controller_actions/_form.html.erb:21:in `block (2 levels) in
_app_views_controller_actions__form_html_erb__366592963_95670400'
actionpack (4.0.0.beta1) lib/action_view/helpers/capture_helper.rb:38:in `block
in capture'
actionpack (4.0.0.beta1) lib/action_view/helpers/capture_helper.rb:200:in
`with_output_buffer'
actionpack (4.0.0.beta1) lib/action_view/helpers/capture_helper.rb:38:in
`capture'
actionpack (4.0.0.beta1) lib/action_view/helpers/form_helper.rb:707:in
`fields_for'
actionpack (4.0.0.beta1) lib/action_view/helpers/form_helper.rb:1501:in
`fields_for'
app/views/controller_actions/_form.html.erb:20:in `block in
_app_views_controller_actions__form_html_erb__366592963_95670400'
actionpack (4.0.0.beta1) lib/action_view/helpers/capture_helper.rb:38:in `block
in capture'
actionpack (4.0.0.beta1) lib/action_view/helpers/capture_helper.rb:200:in
`with_output_buffer'
actionpack (4.0.0.beta1) lib/action_view/helpers/capture_helper.rb:38:in
`capture'
actionpack (4.0.0.beta1) lib/action_view/helpers/form_helper.rb:435:in
`form_for'
app/views/controller_actions/_form.html.erb:1:in
`_app_views_controller_actions__form_html_erb__366592963_95670400'
actionpack (4.0.0.beta1) lib/action_view/template.rb:143:in `block in render'
activesupport (4.0.0.beta1) lib/active_support/notifications.rb:160:in
`instrument'
actionpack (4.0.0.beta1) lib/action_view/template.rb:141:in `render'
actionpack (4.0.0.beta1) lib/action_view/renderer/partial_renderer.rb:306:in
`render_partial'
actionpack (4.0.0.beta1) lib/action_view/renderer/partial_renderer.rb:279:in
`block in render'
actionpack (4.0.0.beta1) lib/action_view/renderer/abstract_renderer.rb:23:in
`block in instrument'
activesupport (4.0.0.beta1) lib/active_support/notifications.rb:158:in `block
in instrument'
activesupport (4.0.0.beta1)
lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (4.0.0.beta1) lib/active_support/notifications.rb:158:in
`instrument'
actionpack (4.0.0.beta1) lib/action_view/renderer/abstract_renderer.rb:23:in
`instrument'
actionpack (4.0.0.beta1) lib/action_view/renderer/partial_renderer.rb:278:in
`render'
actionpack (4.0.0.beta1) lib/action_view/renderer/renderer.rb:41:in
`render_partial'
actionpack (4.0.0.beta1) lib/action_view/helpers/rendering_helper.rb:27:in
`render'
app/views/controller_actions/edit.html.erb:3:in
`_app_views_controller_actions_edit_html_erb__785330494_92185850'
actionpack (4.0.0.beta1) lib/action_view/template.rb:143:in `block in render'
activesupport (4.0.0.beta1) lib/active_support/notifications.rb:160:in
`instrument'
actionpack (4.0.0.beta1) lib/action_view/template.rb:141:in `render'
actionpack (4.0.0.beta1) lib/action_view/renderer/template_renderer.rb:49:in
`block (2 levels) in render_template'
actionpack (4.0.0.beta1) lib/action_view/renderer/abstract_renderer.rb:23:in
`block in instrument'
activesupport (4.0.0.beta1) lib/active_support/notifications.rb:158:in `block
in instrument'
activesupport (4.0.0.beta1)
lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (4.0.0.beta1) lib/active_support/notifications.rb:158:in
`instrument'
actionpack (4.0.0.beta1) lib/action_view/renderer/abstract_renderer.rb:23:in
`instrument'
actionpack (4.0.0.beta1) lib/action_view/renderer/template_renderer.rb:48:in
`block in render_template'
actionpack (4.0.0.beta1) lib/action_view/renderer/template_renderer.rb:56:in
`render_with_layout'
actionpack (4.0.0.beta1) lib/action_view/renderer/template_renderer.rb:47:in
`render_template'
actionpack (4.0.0.beta1) lib/action_view/renderer/template_renderer.rb:17:in
`render'
actionpack (4.0.0.beta1) lib/action_view/renderer/renderer.rb:36:in
`render_template'
actionpack (4.0.0.beta1) lib/action_view/renderer/renderer.rb:17:in `render'
actionpack (4.0.0.beta1) lib/abstract_controller/rendering.rb:119:in
`_render_template'
actionpack (4.0.0.beta1) lib/action_controller/metal/streaming.rb:219:in
`_render_template'
actionpack (4.0.0.beta1) lib/abstract_controller/rendering.rb:112:in
`render_to_body'
actionpack (4.0.0.beta1) lib/action_controller/metal/rendering.rb:33:in
`render_to_body'
actionpack (4.0.0.beta1) lib/action_controller/metal/renderers.rb:26:in
`render_to_body'
actionpack (4.0.0.beta1) lib/abstract_controller/rendering.rb:97:in `render'
actionpack (4.0.0.beta1) lib/action_controller/metal/rendering.rb:16:in `render'
actionpack (4.0.0.beta1) lib/action_controller/metal/instrumentation.rb:41:in
`block (2 levels) in render'
activesupport (4.0.0.beta1) lib/active_support/core_ext/benchmark.rb:5:in
`block in ms'
/home/john/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/benchmark.rb:296:in
`realtime'
activesupport (4.0.0.beta1) lib/active_support/core_ext/benchmark.rb:5:in `ms'
actionpack (4.0.0.beta1) lib/action_controller/metal/instrumentation.rb:41:in
`block in render'
actionpack (4.0.0.beta1) lib/action_controller/metal/instrumentation.rb:84:in
`cleanup_view_runtime'
activerecord (4.0.0.beta1)
lib/active_record/railties/controller_runtime.rb:24:in `cleanup_view_runtime'
actionpack (4.0.0.beta1) lib/action_controller/metal/instrumentation.rb:40:in
`render'
actionpack (4.0.0.beta1) lib/action_controller/metal/implicit_render.rb:10:in
`default_render'
actionpack (4.0.0.beta1) lib/action_controller/metal/implicit_render.rb:5:in
`send_action'
actionpack (4.0.0.beta1) lib/abstract_controller/base.rb:189:in `process_action'
actionpack (4.0.0.beta1) lib/action_controller/metal/rendering.rb:10:in
`process_action'
actionpack (4.0.0.beta1) lib/abstract_controller/callbacks.rb:18:in `block in
process_action'
activesupport (4.0.0.beta1) lib/active_support/callbacks.rb:413:in
`_run__68927184__process_action__callbacks'
activesupport (4.0.0.beta1) lib/active_support/callbacks.rb:78:in
`run_callbacks'
actionpack (4.0.0.beta1) lib/abstract_controller/callbacks.rb:17:in
`process_action'
actionpack (4.0.0.beta1) lib/action_controller/metal/rescue.rb:29:in
`process_action'
actionpack (4.0.0.beta1) lib/action_controller/metal/instrumentation.rb:31:in
`block in process_action'
activesupport (4.0.0.beta1) lib/active_support/notifications.rb:158:in `block
in instrument'
activesupport (4.0.0.beta1)
lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (4.0.0.beta1) lib/active_support/notifications.rb:158:in
`instrument'
actionpack (4.0.0.beta1) lib/action_controller/metal/instrumentation.rb:30:in
`process_action'
actionpack (4.0.0.beta1) lib/action_controller/metal/params_wrapper.rb:245:in
`process_action'
activerecord (4.0.0.beta1)
lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (4.0.0.beta1) lib/abstract_controller/base.rb:136:in `process'
actionpack (4.0.0.beta1) lib/abstract_controller/rendering.rb:44:in `process'
actionpack (4.0.0.beta1) lib/action_controller/metal.rb:196:in `dispatch'
actionpack (4.0.0.beta1) lib/action_controller/metal/rack_delegation.rb:13:in
`dispatch'
actionpack (4.0.0.beta1) lib/action_controller/metal.rb:232:in `block in action'
actionpack (4.0.0.beta1) lib/action_dispatch/routing/route_set.rb:78:in `call'
actionpack (4.0.0.beta1) lib/action_dispatch/routing/route_set.rb:78:in
`dispatch'
actionpack (4.0.0.beta1) lib/action_dispatch/routing/route_set.rb:46:in `call'
actionpack (4.0.0.beta1) lib/action_dispatch/journey/router.rb:69:in `block in
call'
actionpack (4.0.0.beta1) lib/action_dispatch/journey/router.rb:57:in `each'
actionpack (4.0.0.beta1) lib/action_dispatch/journey/router.rb:57:in `call'
actionpack (4.0.0.beta1) lib/action_dispatch/routing/route_set.rb:651:in `call'
rack (1.5.2) lib/rack/etag.rb:23:in `call'
rack (1.5.2) lib/rack/conditionalget.rb:25:in `call'
rack (1.5.2) lib/rack/head.rb:11:in `call'
actionpack (4.0.0.beta1) lib/action_dispatch/middleware/params_parser.rb:27:in
`call'
actionpack (4.0.0.beta1) lib/action_dispatch/middleware/flash.rb:241:in `call'
rack (1.5.2) lib/rack/session/abstract/id.rb:225:in `context'
rack (1.5.2) lib/rack/session/abstract/id.rb:220:in `call'
actionpack (4.0.0.beta1) lib/action_dispatch/middleware/cookies.rb:452:in `call'
activerecord (4.0.0.beta1) lib/active_record/query_cache.rb:36:in `call'
activerecord (4.0.0.beta1)
lib/active_record/connection_adapters/abstract/connection_pool.rb:632:in `call'
activerecord (4.0.0.beta1) lib/active_record/migration.rb:348:in `call'
actionpack (4.0.0.beta1) lib/action_dispatch/middleware/callbacks.rb:29:in
`block in call'
activesupport (4.0.0.beta1) lib/active_support/callbacks.rb:373:in
`_run__125207171__call__callbacks'
activesupport (4.0.0.beta1) lib/active_support/callbacks.rb:78:in
`run_callbacks'
actionpack (4.0.0.beta1) lib/action_dispatch/middleware/callbacks.rb:27:in
`call'
actionpack (4.0.0.beta1) lib/action_dispatch/middleware/reloader.rb:64:in `call'
actionpack (4.0.0.beta1) lib/action_dispatch/middleware/remote_ip.rb:76:in
`call'
actionpack (4.0.0.beta1)
lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
actionpack (4.0.0.beta1)
lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
railties (4.0.0.beta1) lib/rails/rack/logger.rb:38:in `call_app'
railties (4.0.0.beta1) lib/rails/rack/logger.rb:21:in `block in call'
activesupport (4.0.0.beta1) lib/active_support/tagged_logging.rb:67:in `block
in tagged'
activesupport (4.0.0.beta1) lib/active_support/tagged_logging.rb:25:in `tagged'
activesupport (4.0.0.beta1) lib/active_support/tagged_logging.rb:67:in `tagged'
railties (4.0.0.beta1) lib/rails/rack/logger.rb:21:in `call'
actionpack (4.0.0.beta1) lib/action_dispatch/middleware/request_id.rb:21:in
`call'
rack (1.5.2) lib/rack/methodoverride.rb:21:in `call'
rack (1.5.2) lib/rack/runtime.rb:17:in `call'
activesupport (4.0.0.beta1)
lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.5.2) lib/rack/lock.rb:17:in `call'
actionpack (4.0.0.beta1) lib/action_dispatch/middleware/static.rb:64:in `call'
railties (4.0.0.beta1) lib/rails/engine.rb:510:in `call'
railties (4.0.0.beta1) lib/rails/application.rb:96:in `call'
railties (4.0.0.beta1) lib/rails/railtie/configurable.rb:30:in `method_missing'
unicorn (4.6.2) lib/unicorn/http_server.rb:552:in `process_client'
unicorn (4.6.2) lib/unicorn/http_server.rb:632:in `worker_loop'
unicorn (4.6.2) lib/unicorn/http_server.rb:500:in `spawn_missing_workers'
unicorn (4.6.2) lib/unicorn/http_server.rb:511:in `maintain_worker_count'
unicorn (4.6.2) lib/unicorn/http_server.rb:277:in `join'
unicorn (4.6.2) bin/unicorn_rails:209:in `<top (required)>'
/home/john/.rvm/gems/ruby-2.0.0-p0@rails-4/bin/unicorn_rails:23:in `load'
/home/john/.rvm/gems/ruby-2.0.0-p0@rails-4/bin/unicorn_rails:23:in `<top
(required)>'
ruby-debug-ide (0.4.17.beta16) lib/ruby-debug-ide.rb:86:in `debug_load'
ruby-debug-ide (0.4.17.beta16) lib/ruby-debug-ide.rb:86:in `debug_program'
ruby-debug-ide (0.4.17.beta16) bin/rdebug-ide:109:in `<top (required)>'
-e:1:in `load'
-e:1:in `<main>'
Request
*Parameters*:
{"id"=>"1"}
Toggle session dump <http://localhost:3100/controller_actions/1/edit#>
Toggle env dump <http://localhost:3100/controller_actions/1/edit#>
Response
*Headers*:
None
Sorry about the verbosity but I am really struggling to solve this most
basic use case.
I have tried to figure out why the form builder returns an array but and
would write my own if I could figure out how to.
Any help appreciated.
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