我试图让嵌套表单工作，但不断收到以下错误：
ActiveModel::MassAssignmentSecurity::ResponsesController#create 中的错误
无法批量分配受保护的属性：gate_answer
这是我的模型......我做错了什么？
class Response < ActiveRecord::Base
attr_accessible :gate_id, :gate_answers_attributes
belongs_to :gate
has_many :gate_answers
accepts_nested_attributes_for :gate_answers
end
class GateAnswer < ActiveRecord::Base
attr_accessible :prospect_id, :gate_question_id, :content, :response_id
belongs_to :response
end
和数据库模式提取：
create_table "gate_answers", :force => true do |t|
t.integer "prospect_id"
t.integer "gate_question_id"
t.text "content"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
t.integer "response_id"
end
create_table "responses", :force => true do |t|
t.integer "gate_id"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
end
..和我的控制器
# responses_controller.rb
def create
@response = Response.new(params[:response])
respond_to do |format|
if @response.save
format.html { redirect_to :action => 'index', :gate_id => (params[:response][:gate_id]), notice: 'Response was successfully created.' }
else
format.html { render action: "new" }
end
end
end
#gate_answers_controller.rb
def create
@gate_answer = GateAnswer.new(params[:gate_answer])
#code below finds URL that user will be redirected to after form is saved
@gate = Gate.find(params[:gate_answer][:gate_id])
respond_to do |format|
if @gate_answer.save
format.html { redirect_to @gate.content_url, notice: 'Redirecting.' } #redirect to URL per above
else
format.html { render action: "new" }
end
end
end
我究竟做错了什么？