Wednesday, March 27, 2013
See https://github.com/ozpos/urps2 - use case 1
On Sunday, 24 March 2013 12:20:49 UTC, jle...@socit.co.uk wrote:
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
Show | Back
Under Rails 4.0 you get:-undefined method `role' for #<Array:0xb875d4c>Extracted source (around line #21):
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 | Framework Trace | Full Traceapp/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"}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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