无法以嵌套形式更新子元素答案

【问题标题】：Unable to Update child element in nested form无法以嵌套形式更新子元素
【发布时间】：2014-10-16 07:05:08
【问题描述】：

无法更新 2 级和 3 级嵌套表单属性。我可以更新 1 级属性，但不知道为什么它不更新。

下面是我的代码

  def update
    @buyer.update_attributes(params[:buyer])
    if params[:id].to_i != 0 
      redirect_to wizard_path(:buyer_posting_params)
    else
      render_wizard @buyer
    end
  end

以下是我的参数

"buyer"=>{"buyer_forms_attributes"=>{"0"=>{"buyer_posting_params_attributes"=>{"0"=>{"id"=>"13", "_destroy"=>"false", "param_name"=>"11", "param_type"=>"dynamic", "param_value"=>"", "question_id"=>"17"}, "1"=>{"id"=>"14", "_destroy"=>"false", "param_name"=>"22", "param_type"=>"dynamic", "param_value"=>"", "question_id"=>"2"}, "2"=>{"id"=>"17", "_destroy"=>"false", "param_name"=>"33", "param_type"=>"static", "param_value"=>"test", "question_id"=>""}}, "id"=>"4"}, "1"=>{"buyer_posting_params_attributes"=>{"1413443012516"=>{"_destroy"=>"false", "param_name"=>"22", "param_type"=>"动态", "param_value"=>"", "question_id"=>"24"}}, "id"=>"44"}}}

我正在使用 Rails 3.2

关系如下：

One Buyer HasMany BuyerForms
One BuyerForm HasMany BuyerPostingParams

请帮帮我。

提前致谢

【问题讨论】：

标签： ruby-on-rails ruby-on-rails-3.2 nested-forms

【解决方案1】：

您接受嵌套属性吗？如果没有，这可能会对您有所帮助：

http://apidock.com/rails/ActiveRecord/NestedAttributes/ClassMethods/accepts_nested_attributes_for

# buyer.rb
accepts_nested_attributes_for :buyer_forms

# buyer_form.rb
accepts_nested_attributes_for :buyer_posting_params

【讨论】：