Ruby on rails 另一个Rails 3嵌套表单问题

因此，我有以下几点：

class ComplexAssertion < ActiveRecord::Base
  has_many :assertion_groups
  has_many :assertions, :through => :assertion_group

class AssertionGroup < ActiveRecord::Base
  belongs_to :complex_assertion
  has_many :assertions, :dependent => :destroy, :autosave=>true

class Assertion < ActiveRecord::Base
  belongs_to :assertion_group

<%= form_for(@complex_assertion) do |f| %>
<div class="childGroup1" style="padding:5px;">
      <%= f.fields_for :assertion_groups do |assertion_group_fields| %>
      <%= assertion_group_fields.fields_for :assertions do |assertion_fields| %>
      Type: <%= assertion_fields.collection_select :assertion_type_id, AssertionType.all, :id, :name %>
      Attribute: <%= assertion_fields.collection_select :attribute_name, Attribute.find_by_sql("select distinct a.name from attributes a "), :name, :name %>
      <%= assertion_fields.label :operator_type_id %>: <%= assertion_fields.collection_select :operator_type_id, OperatorType.all, :id, :value %>
      Value: <%= assertion_fields.text_field :value, :size=>'1' %>
      <% end %>
          <div id="innerOperator">
            <!--OPERATOR BETWEEN EACH ASSERTION IN A GROUP-->
            <%= assertion_group_fields.collection_select :logical_operator_type_id, LogicalOperatorType.all, :id, :value %>
          </div>
      <% end %>
    </div>
    <div id="createComplex" align="center">
       <%= f.submit :value=>'Submit' %>
    </div>
<% end %>

我已经尝试了多次修改以使其正确工作，但我认为我缺少一些非常基本的逻辑。谁能给我指出正确的方向吗？我的印象是，如果我正确地完成模型并使用Form_构建器，Rails将处理插入和关系

谢谢

添加了控制器代码-非常普通

def create
@complex_assertion = ComplexAssertion.new(params[:complex_assertion])
respond_to do |format|
  if @complex_assertion.save
    format.html { redirect_to(@complex_assertion, :notice => 'Complex assertion was successfully created.') }
    format.xml  { render :xml => @complex_assertion, :status => :created, :location => @complex_assertion }
  else
    format.html { render :action => "new" }
    format.xml  { render :xml => @complex_assertion.errors, :status => :unprocessable_entity }
  end
end
end

---

您的

ComplexAssertion

类应该如下所示

class ComplexAssertion < ActiveRecord::Base
  has_many :assertion_groups
  has_many :assertions, :through => :assertion_group

  accepts_nested_attributes_for :assertion_groups # <= add this

class AssertionGroup < ActiveRecord::Base
  belongs_to :complex_assertion
  has_many :assertions, :dependent => :destroy, :autosave=>true

  accepts_nested_attributes_for :assertions # <= add this

---

您可以在（“嵌套属性示例”、“一对多”）中找到更多信息。

在这种情况下，添加控制器代码会很有帮助，因为这就是堆栈跟踪所指向的位置……添加该行后，我重新启动了服务器，提交表单并得到错误：unknown attribute:assertion\u group如果没有任何代码或堆栈跟踪，将很难帮助您，但是您的断言组接受断言字段。为了清楚起见，我更新了我的答案以反映这一点。请。让我知道你需要什么。我很乐意把它放在这里。我已经改变了我的模型，完全符合你上面所说的。当我这样做时，不会为这个块编写任何表单：我看不到任何错误，只是：assertion\u组没有表单，然后是：assertions显然没有表单。所以我很清楚：一个复杂的断言有多个断言\u组-在assertion\u groups表中有一个复杂的断言\u ID。然后，断言组由断言组成，断言组表中有一个断言ID。也许我的思维是倒退的。但是…表单应该创建一个新的包含组和组包含断言的复杂断言。

class AssertionGroup < ActiveRecord::Base
  belongs_to :complex_assertion
  has_many :assertions, :dependent => :destroy, :autosave=>true

  accepts_nested_attributes_for :assertions # <= add this