如何允许具有强参数的数组

这是来自Rails 3应用程序的创建操作

def create @question = Question.new(params[:question]) respond_to do |format| if @question.save format.html { redirect_to @question, notice: 'Question was successfully created.' } format.json { render json: @question, status: :created, location: @question } else format.html { render action: "new" } format.json { render json: @question.errors, status: :unprocessable_entity } end end end 这是来自Rails 4应用程序的创建操作

def create @question = Question.new(question_params)

   respond_to do |format|
  if @question.save
    format.html { redirect_to @question, notice: 'Question was successfully created.' }
    format.json { render json: @question, status: :created, location: @question }
  else
    format.html { render action: "new" }
    format.json { render json: @question.errors, status: :unprocessable_entity }
  end
end
end

这是question_params方法

private def question_params params.require(:question).permit(:question_details, :question_content, :user_id, :accepted_answer_id, :province_id, :city, :category_ids) end