未定義的方法`build_users'與嵌套模型

Question

我陷入了嵌套屬性的麻煩。

這裏是我的帳號模式：

class Account < ActiveRecord::Base 

    has_many :products 
    has_many :blogs 
    has_many :openings 
    has_many :users 
    has_one :logo, :class_name => "AccountPicture" 
    has_one :address, :class_name => "AccountAddress" 
    has_and_belongs_to_many :options 


    accepts_nested_attributes_for :logo, :allow_destroy => true 
    accepts_nested_attributes_for :address, :allow_destroy => true 
    accepts_nested_attributes_for :users, :allow_destroy => true 

end 

這裏是我的用戶模型：

class User < ActiveRecord::Base 
    belongs_to :account 
end 

爲標誌，地址和用戶正如你所看到的，客戶接受嵌套屬性。

在測試時，我可以使用徽標和地址的嵌套屬性，但不能爲用戶使用。

a = Account.new 

=> #<Account id: nil, hostname: nil, subdomain: nil, name: nil, description: nil, base_line: nil, footer: nil, phone_number: nil, mobile_number: nil, email_address: nil, created_at: nil, updated_at: nil> 

# building the address works fine 
>> a.build_address 
=> #<AccountAddress id: nil, account_id: nil, country: nil, state: nil, county: nil, city: nil, suburb: nil, zipcode: nil, street: nil, streetno: nil, longitude: nil, latitude: nil, error_code: nil> 

# building the users fails 
>> a.build_users 
NoMethodError: undefined method `build_users' for #<Account:0x7f6862a5f948> 
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/attribute_methods.rb:260:in `method_missing' 
from (irb):2 

因此，我的看法，當我使用嵌套形式，我得到這個錯誤回：

User(#69850615730460) expected, got Array(#69850664775200) 

任何幫助，將不勝感激。

謝謝。

編輯：鑑於

<%= error_messages_for :account %> 

<% form_for :account, :url => accounts_path do |f| -%> 
<fieldset> 
    <legend>Account</legend> 

    <%= label_tag 'name' %> 
    <%= f.text_field :name, :class => "textbox" %> 

</fielset> 

<% f.fields_for :users do |user_form| %> 

    <fieldset> 
    <legend>User</legend> 
    <%= label_tag 'email' %> 
    <%= user_form.text_field :email, :class => "textbox" %> 

    <%= label_tag 'password' %> 
    <%= user_form.password_field :password, :class => "textbox" %> 

    <%= label_tag 'password_confirmation' %> 
    <%= user_form.password_field :password_confirmation, :class => "textbox" %> 

    </fieldset> 
<% end -%> 

<div class="buttons"> 
    <%= submit_tag 'Submit', :class => "button" %> 
</div> 
<% end -%> 

Answer 1

使用

a.users.build() #as Account has many users