Ruby on rails '；Can'；t大规模分配受保护的属性'；使用嵌套表单实现多表继承时

嗨，我正在尝试在我的应用程序中实现MTI。我有一个人模型和从中继承的两个模型：客户和团队成员。创建团队成员时，我希望将人员（姓名、电子邮件等）和团队成员（经验水平、团队类型，如果领导与否）的值保存到数据库中。我使用嵌套属性表单，因此在我的团队成员表单中，我嵌套了person字段。不幸的是，我在尝试保存时遇到了“无法批量分配受保护的属性：个人”错误。有人能告诉我怎么解决这个问题吗？谢谢 型号：

更新了TeamMember类，但仍然存在相同的错误 还尝试了人员属性和人员属性，但均无效

class TeamMember < ActiveRecord::Base
  has_many :project_team_members
  has_many :projects, through: :project_team_members
  has_one :person, as: :profile, dependent: :destroy
  accepts_nested_attributes_for :person
  attr_accessible :person_attributes, :experience_level, :lead, :qualification, :team
end

class Person < ActiveRecord::Base
  belongs_to :company
  belongs_to :profile, polymorphic: true
  attr_accessible :email, :first_name, :last_name, :phone_number, :profile_id,     :profile_type
end

---

若要以嵌套形式大量指定属性，需要指定：

class TeamMember < ActiveRecord::Base
  has_many :project_team_members
  has_many :projects, through: :project_team_members
  has_one :person, as: :profile, dependent: :destroy
  :experience_level, :lead, :qualification, :team #what is this line doing??
  accepts_nested_attributes_for :person      
  attr_accessible :person_attributes    
end

---

然后您将有一个人（非持久化）与@team_member关联。

实际上，当我为：person添加行接受嵌套的属性并刷新页面时，person的字段完全消失。确定。它可能消失了，因为您传递的@team_member刚刚初始化，没有关联人员。是吗？是的，我确实是。调用新操作时，我初始化TeamMember对象。但是，当我尝试添加建议的行（@team_member.person.build）时，它返回'undefined method'build'for nil:NilClass'。为什么呢？顺便提一下，蒂亚戈-我真的很感谢你的帮助。对不起。我的错误。我编辑了答案。你应该尝试：@team\u member.build\u person，如果它是一个has\u one关联。build（）是为很多人准备的。我通过如上所述更改我的create方法解决了这个问题。蒂亚戈-你是最棒的：）非常感谢你！

<%= form_for(@team_member) do |f| %>
  <%= f.fields_for :person do |ff| %>
    <div>
      <%= ff.label :first_name %>
      <%= ff.text_field :first_name %>
    </div>
    <div>
      <%= ff.label :last_name %>
      <%= ff.text_field :last_name %>
    </div>
    <div>
      <%= ff.label :phone_number %>
      <%= ff.text_field :phone_number %>
    </div>
    <div>
      <%= ff.label :email %>
      <%= ff.text_field :email %>
    </div>
    <div>
      <%= ff.label :company_id %>
      <%= ff.text_field :company_id %>
    </div>
<% end %>
<div class="field">
  <%= f.label :team %><br />
  <%= f.text_field :team %>
</div>
<div class="field">
  <%= f.label :experience_level %><br />
  <%= f.text_field :experience_level %>
</div>
<div class="field">
  <%= f.label :qualification %><br />
  <%= f.text_field :qualification %>
</div>
<div class="field">
  <%= f.label :lead %><br />
  <%= f.check_box :lead %>
</div>
  <div class="actions">
<%= f.submit %>
</div>

def new
  @team_member = TeamMember.new
  @team_member.build_person

  respond_to do |format|
    format.html # new.html.erb
    format.json { render json: @team_member }
  end
end

def create
  @team_member = TeamMember.create!(params[:team_member])
  redirect_to root_url
end

class TeamMember < ActiveRecord::Base
  has_many :project_team_members
  has_many :projects, through: :project_team_members
  has_one :person, as: :profile, dependent: :destroy
  :experience_level, :lead, :qualification, :team #what is this line doing??
  accepts_nested_attributes_for :person      
  attr_accessible :person_attributes    
end

@team_member = TeamMember.new
@team_member.build_person