Question

我一直收到一个未知的属性错误，尽管我在这里尝试了一些类似的答案。我试图使用嵌套表单将委员会和属性属性更新为连接表委员会历史记录，当我尝试加载视图表单时，我得到这个错误，请建议您认为我可能做错了我是新的rails和编程。< / p>

错误

Started PUT "/properties/6/build/council" for 127.0.0.1 at 2013-08-19 17:35:45 +0100
Processing by Properties::BuildController#update as HTML
  Parameters: {"utf8"=>"✓",     "authenticity_token"=>"wBWQaxtBioqzGLkhUrstqS+cFD/xvEutXnJ0jWNtSa0=", "property"=>   {"council_history_attributes"=>{"council_id"=>""}}, "commit"=>"Create Council history",  "property_id"=>"6", "id"=>"council"}
  Property Load (0.3ms)  SELECT "properties".* FROM "properties" WHERE "properties"."id" =  ? LIMIT 1  [["id", "6"]]
   (0.1ms)  begin transaction
   (0.1ms)  rollback transaction
Completed 500 Internal Server Error in 6ms

ActiveRecord::UnknownAttributeError - unknown attribute: council_history_attributes:
  activerecord (3.2.13) lib/active_record/attribute_assignment.rb:88:in `block in  assign_attributes'
  activerecord (3.2.13) lib/active_record/attribute_assignment.rb:78:in `assign_attributes'
  activerecord (3.2.13) lib/active_record/persistence.rb:216:in `block in update_attributes'
  activerecord (3.2.13) lib/active_record/transactions.rb:313:in `block in with_transaction_returning_status'
  activerecord (3.2.13) lib/active_record/connection_adapters/abstract/database_statements.rb:192:in `transaction'
  activerecord (3.2.13) lib/active_record/transactions.rb:208:in `transaction'
  activerecord (3.2.13) lib/active_record/transactions.rb:311:in `with_transaction_returning_status'
  activerecord (3.2.13) lib/active_record/persistence.rb:215:in `update_attributes'
  app/controllers/properties/build_controller.rb:24:in `update'

属性模型

class Property < ActiveRecord::Base
  attr_accessible  :name, :address_attributes, :tenants_attributes, :meter_attributes, :council_history, :council_history_attributes, :property_id, :council_id, :status
  belongs_to :user 

  has_one :council_history

  has_one :council, through: :council_history, :foreign_key => :council_id
  accepts_nested_attributes_for :council

end

理事会模式

class Council < ActiveRecord::Base
  attr_accessible :CouncilEmail, :name, :CouncilTel

  has_many   :council_history

  has_many   :properties, :through => :council_history, :foreign_key => :property_id
end

委员会历史模型 - 加入表

class CouncilHistory < ActiveRecord::Base
  attr_accessible :council_id, :property_id, :vacant 

  belongs_to :council

  belongs_to :property

end

* 查看*

<%= simple_form_for @property, :url => url_for(:action => 'update', :controller =>    'properties/build'), :method => 'put' do |f| %>
  <%= f.simple_fields_for :council do |builder| %>
      <%= builder.input :council_id, :collection => Council.all  %>
      <%= builder.submit %>
    <% end %>
<% end %>

属性/构建控制器

class Properties::BuildController < ApplicationController
  include Wicked::Wizard

   steps :tenant, :meter, :council, :confirmed 

  def show
    @property = Property.find(params[:property_id])
    @tenants = @property.tenants.new(params[:tenant_id])
    @meter = @property.build_meter
    @council = @property.build_council
    @council_history = @property.council_history.build
    render_wizard
  end

  def edit
    @property = Property.find(params[:property_id])
  end


  def update
    @property = Property.find(params[:property_id])
    params[:property][:status] = step.to_s
    params[:property][:status] = 'active' if step == steps.last
    @property.update_attributes(params[:property])
    render_wizard @property
  end

Answer 1

property.rb 中的

添加accepts_nested_attributes_for :council_history

class Property < ActiveRecord::Base
 attr_accessible  :name, :address_attributes, :tenants_attributes, :meter_attributes,         :council_history, :council_history_attributes, :property_id, :council_id, :status
 belongs_to :user 

 has_one :council_history

  has_one :council, through: :council_history, :foreign_key => :council_id
  accepts_nested_attributes_for :council

  accepts_nested_attributes_for :council_history #add this line

 end

Answer 2

感谢您的回答Muntasim。我无法直接对已接受的答案发表评论但是，想要更新如何执行此操作，因为attr_accessible不再位于Rails（上一版本v2.3.8）中，并引入了 strong parameters 在Rails 4 +。

控制器中的强参数，

def person_params
  params.permit(:name, {:emails => []}, :friends => [ :name, { :family => [ :name ], :hobbies => [] }])
end

可以使用强参数outside of controllers（这是我遇到的问题，导致我在这里），

raw_parameters = { :email => "john@example.com", :name => "John", :admin => true }
parameters = ActionController::Parameters.new(raw_parameters)
user = User.create(parameters.permit(:name, :email))

或者，如果您想使用attr_accessible，您仍然可以，请参阅此answer。

如果您想使用attr_accessible，则需要添加 protected_attributes到您的Gemfile。否则，你将面临带有RuntimeError。

未知属性错误嵌套属性

2 个答案: