Question

我有一个活动模型和一个场地模型。每个活动有1个场地。但是场地可以有多个活动。作为活动创建过程的一部分，我还想捕获有关场地的信息并存储它。现在我正在努力使用嵌套表单设置。我收到以下错误：

ActiveRecord::UnknownAttributeError in EventsController#new
unknown attribute: event_id

活动模型

class Event < ActiveRecord::Base
attr_accessible :name, :budget, :user_id, :venue_id, :client, :date, :description, 
:attendees, :assets_attributes, :tag_list, :venue_attributes
belongs_to :user

has_many :assets, :dependent => :destroy
has_many :vendors
has_one :venue

accepts_nested_attributes_for :assets, :allow_destroy => true
accepts_nested_attributes_for :vendors, :allow_destroy => true
accepts_nested_attributes_for :venue, :allow_destroy => true
acts_as_taggable
end

场地模型

class Venue < ActiveRecord::Base
attr_accessible :capacity, :city, :contact, :country, :email, :exclusiveVendors,:fee, 
:latitude, :longitude, :name, :state, :street, :tel, :union
belongs_to :event
has_many :vendors
acts_as_gmappable
has_many :events
end

事件控制器

def new
  @event = Event.new
  5.times { @event.assets.build }
  venue = @event.build_venue()
  # respond_to do |format|
  #   format.html # new.html.erb
  #   format.xml  { render :xml => @event }
  # end

end

def create
  @user = current_user
  @event = Event.new(params[:event])
  @event.create_venue()

  5.times { @event.build_assets}
  if @event.save
    redirect_to @event, :notice => "Successfully created event."
  else
    render :action => 'new'
  end
end

表格（摘录）

<%= f.fields_for :venue do |builder| %>

    <%= builder.label :name %><br />
    <%= builder.text_field :name %>

<% end %>

Answer 1

我认为你这里的关系错了。场地模型应该有has_many：events和Event模型应该有belongs_to：venue和一个名为venue_id的字段。

从场景模型中删除has_one：场地，并从场地模型中删除belongs_to：event。

嵌套表单的未知属性错误 - Rails 3.2

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