关注railscast#196但使用Rails 4 – 我在尝试从问题父模型中删除答案时遇到了问题.
未允许的参数:_destroy
_answer_fields.html.erb
<fieldset> <%= f.text_field :response %> <%= f.hidden_field :_destroy %> <%= link_to "remove","#",class: "remove_fields" %> </fieldset>
question.rb
accepts_nested_attributes_for :questions,:allow_destroy => true
surveys_controller.rb
def survey_params params.require(:survey).permit(:name,:questions_attributes => [:id,:content,:answers_attributes => [:id,:response]]) end
谢谢
编辑:JS设置隐藏变量
jQuery -> $(document).on 'click',".remove_fields",(event) -> $(this).prev('input[type=hidden]').val('1') $(this).closest('fieldset').hide() event.preventDefault()
解决方法
@Hitham S. AlQadheeb可能是对的 – 检查你的模型是否正确……
survey.rb
class Survey < ActiveRecord::Base has_many :questions,:dependent => :destroy accepts_nested_attributes_for :questions end
和问题.rb
class Question < ActiveRecord::Base belongs_to :survey has_many :answers,:dependent => :destroy accepts_nested_attributes_for :answers,:reject_if => lambda { |a| a[:content].blank? },:allow_destroy => true end
不允许的参数:_destroy错误实际上应该指的是你的控制器的强参数的实现:survey_params.你需要告诉rails你的表单将传递:_destroy字段.试试这个:
def survey_params params.require(:survey).permit(:name,:_destroy,:response,:_destroy]]) end ---------------------------------------------------------------------------------^ -------------------------------------------------------------------------------------------------------------------------------------^