Rails 4 Checkbox helper-table - Many_to_many

Question

У меня возникла следующая проблема: я хочу создать сайт с флажками, где пользователь может выбрать других пользователей для определенной задачи (например, клоун-каракули). До сих пор я получил представление о том, что он отображает всех существующих пользователей, но теперь я хочу, чтобы пользователь решил, какой из них «посещает» задачу.

Я тестировал модель через консоль, и все работает до сих пор, но я просто не могу получить участие в boolean в наборе помощников-участников. Если я запускаю такой код, я всегда получаю « NoMethodError in TasksController # участвовать undefined method` find_by_user_id 'for # "- Ошибка!

Любые идеи?

модели:

class Testuser < ActiveRecord::Base 
    has_many :attendees 
    has_many :tasks, :through => :attendees 
end 
class Task < ActiveRecord::Base 
    has_many :attendees 
    has_many :testusers, :through => :attendees 

class Attendee < ActiveRecord::Base 
    belongs_to :task 
    belongs_to :testuser 
end 

schema.rb:

create_table "attendees", force: true do |t| 
    t.integer "task_id" 
    t.integer "testuser_id" 
    t.boolean "participate" 
    t.datetime "created_at" 
    t.datetime "updated_at" 
    end 

    create_table "tasks", force: true do |t| 
    t.string "title" 
    t.text  "text" 
    t.datetime "created_at" 
    t.datetime "updated_at" 
    t.datetime "task_date" 
    t.boolean "participate" 
    end 

    create_table "testusers", force: true do |t| 
    t.string "username" 
    t.datetime "created_at" 
    t.datetime "updated_at" 
    end 

tasks_controller.rb

 def select_user 
     @testuser = Testuser.all 
    end 

    def participate 

     # "user_checkbox"=>["4","6","8"], => example_output of the parameters 
     params[:user_checkbox].each do |check| 
      check_id = check 

      t = Attendee.find_by_user_id(check_id) 
      t.update_attribute(:participate, true) 

      @attendee = Attendee(where participate == true) 
     end 
     end 

select_user.html.erb

<h1>Select Users</h1> 
<%= form_tag("/tasks/participate/", :method => "post") do %> 
    <ul> 
    <% @testuser.each do |testuser| %> 
     <li> <%= check_box_tag "user_checkbox[]",testuser.id %> <%= testuser.username %></li> 
    <% end %> 
    </ul> 
    <%= submit_tag("Teilnehmer hinzufügen") %> 
<% end %> 

полный трассировки стека:

activerecord (4.1.6) lib/active_record/dynamic_matchers.rb:26:in `method_missing' 
app/controllers/tasks_controller.rb:46:in `block in participate' 
app/controllers/tasks_controller.rb:41:in `each' 
app/controllers/tasks_controller.rb:41:in `participate' 
actionpack (4.1.6) lib/action_controller/metal/implicit_render.rb:4:in `send_action' 
actionpack (4.1.6) lib/abstract_controller/base.rb:189:in `process_action' 
actionpack (4.1.6) lib/action_controller/metal/rendering.rb:10:in `process_action' 
actionpack (4.1.6) lib/abstract_controller/callbacks.rb:20:in `block in process_action' 
activesupport (4.1.6) lib/active_support/callbacks.rb:113:in `call' 
activesupport (4.1.6) lib/active_support/callbacks.rb:113:in `call' 
activesupport (4.1.6) lib/active_support/callbacks.rb:229:in `block in halting' 
activesupport (4.1.6) lib/active_support/callbacks.rb:229:in `call' 
activesupport (4.1.6) lib/active_support/callbacks.rb:229:in `block in halting' 
activesupport (4.1.6) lib/active_support/callbacks.rb:166:in `call' 
activesupport (4.1.6) lib/active_support/callbacks.rb:166:in `block in halting' 
activesupport (4.1.6) lib/active_support/callbacks.rb:166:in `call' 
activesupport (4.1.6) lib/active_support/callbacks.rb:166:in `block in halting' 
activesupport (4.1.6) lib/active_support/callbacks.rb:166:in `call' 
activesupport (4.1.6) lib/active_support/callbacks.rb:166:in `block in halting' 
activesupport (4.1.6) lib/active_support/callbacks.rb:86:in `call' 
activesupport (4.1.6) lib/active_support/callbacks.rb:86:in `run_callbacks' 
actionpack (4.1.6) lib/abstract_controller/callbacks.rb:19:in `process_action' 
actionpack (4.1.6) lib/action_controller/metal/rescue.rb:29:in `process_action' 
actionpack (4.1.6) lib/action_controller/metal/instrumentation.rb:31:in `block in process_action' 
activesupport (4.1.6) lib/active_support/notifications.rb:159:in `block in instrument' 
activesupport (4.1.6) lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
activesupport (4.1.6) lib/active_support/notifications.rb:159:in `instrument' 
actionpack (4.1.6) lib/action_controller/metal/instrumentation.rb:30:in `process_action' 
actionpack (4.1.6) lib/action_controller/metal/params_wrapper.rb:250:in `process_action' 
activerecord (4.1.6) lib/active_record/railties/controller_runtime.rb:18:in `process_action' 
actionpack (4.1.6) lib/abstract_controller/base.rb:136:in `process' 
actionview (4.1.6) lib/action_view/rendering.rb:30:in `process' 
actionpack (4.1.6) lib/action_controller/metal.rb:196:in `dispatch' 
actionpack (4.1.6) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch' 
actionpack (4.1.6) lib/action_controller/metal.rb:232:in `block in action' 
actionpack (4.1.6) lib/action_dispatch/routing/route_set.rb:82:in `call' 
actionpack (4.1.6) lib/action_dispatch/routing/route_set.rb:82:in `dispatch' 
actionpack (4.1.6) lib/action_dispatch/routing/route_set.rb:50:in `call' 
actionpack (4.1.6) lib/action_dispatch/journey/router.rb:73:in `block in call' 
actionpack (4.1.6) lib/action_dispatch/journey/router.rb:59:in `each' 
actionpack (4.1.6) lib/action_dispatch/journey/router.rb:59:in `call' 
actionpack (4.1.6) lib/action_dispatch/routing/route_set.rb:678:in `call' 
rack (1.5.2) lib/rack/etag.rb:23:in `call' 
rack (1.5.2) lib/rack/conditionalget.rb:35:in `call' 
rack (1.5.2) lib/rack/head.rb:11:in `call' 
actionpack (4.1.6) lib/action_dispatch/middleware/params_parser.rb:27:in `call' 
actionpack (4.1.6) lib/action_dispatch/middleware/flash.rb:254: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 (4.1.6) lib/action_dispatch/middleware/cookies.rb:560:in `call' 
activerecord (4.1.6) lib/active_record/query_cache.rb:36:in `call' 
activerecord (4.1.6) lib/active_record/connection_adapters/abstract/connection_pool.rb:621:in `call' 
activerecord (4.1.6) lib/active_record/migration.rb:380:in `call' 
actionpack (4.1.6) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call' 
activesupport (4.1.6) lib/active_support/callbacks.rb:82:in `run_callbacks' 
actionpack (4.1.6) lib/action_dispatch/middleware/callbacks.rb:27:in `call' 
actionpack (4.1.6) lib/action_dispatch/middleware/reloader.rb:73:in `call' 
actionpack (4.1.6) lib/action_dispatch/middleware/remote_ip.rb:76:in `call' 
actionpack (4.1.6) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call' 
actionpack (4.1.6) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call' 
railties (4.1.6) lib/rails/rack/logger.rb:38:in `call_app' 
railties (4.1.6) lib/rails/rack/logger.rb:20:in `block in call' 
activesupport (4.1.6) lib/active_support/tagged_logging.rb:68:in `block in tagged' 
activesupport (4.1.6) lib/active_support/tagged_logging.rb:26:in `tagged' 
activesupport (4.1.6) lib/active_support/tagged_logging.rb:68:in `tagged' 
railties (4.1.6) lib/rails/rack/logger.rb:20:in `call' 
actionpack (4.1.6) 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 (4.1.6) lib/active_support/cache/strategy/local_cache_middleware.rb:26:in `call' 
rack (1.5.2) lib/rack/lock.rb:17:in `call' 
actionpack (4.1.6) lib/action_dispatch/middleware/static.rb:64:in `call' 
rack (1.5.2) lib/rack/sendfile.rb:112:in `call' 
railties (4.1.6) lib/rails/engine.rb:514:in `call' 
railties (4.1.6) lib/rails/application.rb:144:in `call' 
rack (1.5.2) lib/rack/lock.rb:17:in `call' 
rack (1.5.2) lib/rack/content_length.rb:14:in `call' 
rack (1.5.2) lib/rack/handler/webrick.rb:60:in `service' 
/Users/xxx/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/webrick/httpserver.rb:138:in `service' 
/Users/xxx/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/webrick/httpserver.rb:94:in `run' 
/Users/xxx/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/webrick/server.rb:295:in `block in start_thread' 

Answer 1

Ваш дб таблица attendees не имеет user_id поле:

create_table "attendees", force: true do |t| 
    t.integer "task_id" 
    t.integer "testuser_id" 
    t.boolean "participate" 
    t.datetime "created_at" 
    t.datetime "updated_at" 
end 

Вот почему t = Attendee.find_by_user_id(check_id) не работает.

Также ваш код очень странный и крайне неэффективен. Вы запускаете sql SELECT для каждой записи. Вы запускаете sql UPDATE для каждой записи без транзакции. Также вы переписываете @attendee на каждом шагу и, в конце концов, у вас есть только последний. И этот синтаксис неверен: Attendee(where participate == true). Вы можете переписать все так:

# in case if you don't need to run validations and callbacks on each Attendee 
# you can make all job by 1 SQL UPDATE 
Attendee.where(testuser_id: params[:user_checkbox]).update_all(participate: true) 
@attendees = Attendee.where(testuser_id: params[:user_checkbox]) 

# in case if you need to run validations and callbacks on each Attendee 
# you pull all records by 1 query and then update each 
@attendees = Attendee.where(testuser_id: params[:user_checkbox]) 
Attendee.transaction do 
    @attendees.each do |attendee| 
    attendee.update_attributes!(participate: true) 
    end 
end