ActiveModel :: MissingAttributeError - rails

Question

我的代码存在问题：

模型：

class UsefulPhrase < ActiveRecord::Base
   has_many :useful_phrase_contents
   accepts_nested_attributes_for :useful_phrase_contents
   validates_presence_of :key
end

class UsefulPhraseContent < ActiveRecord::Base
   belongs_to :useful_phrase
   attr_accessor :useful_phrase_id
   validates_presence_of :language, :content
end

控制器：

def new
  @useful_phrase = UsefulPhrase.new
  @available_languages = available_languages
  @useful_phrase.useful_phrase_contents.build
end

def create
  @useful_phrase = UsefulPhrase.new(useful_phrase_params)
  @useful_phrase.useful_phrase_contents.build(upc_params)

  respond_to do |format|
   if @useful_phrase.save
     format.html { redirect_to @useful_phrase, notice: 'bla-bla' }
     format.json { render :show, status: :created, location: @useful_phrase }
   else
     format.html { render :new }
     format.json { render json: @useful_phrase.errors, status: :unprocessable_entity }
   end
  end
end

def useful_phrase_params
   params.require(:useful_phrase).permit(:key)    
end


def upc_params
    params.require(:useful_phrase).require(:useful_phrase_content).permit(:language, :content)
end

当我尝试保存我得到的任何记录时：

  

/ useful_phrases中的ActiveModel :: MissingAttributeError       无法写出未知属性useful_phrase_id

我不知道如何修复它。

Answer 1

尝试在upc_params中编辑参数

params.require（：useful_phrase）       .permit（：language，content，：useful_phrase_content =＆gt; [puttheattributefor use_ful_phrase_content]）