我在写一个简单的Rails模型,名为Person has_many :phone_numbers
,我试图将手机号码保存为复杂的形式,而无需手动编写setter方法。 accepts_nested_attributes_for
应该做我想要的,但我无法使其正常工作。下面的代码我到目前为止:使用Rails模型与accept_nested_attributes_for
迁移
class CreatePeople < ActiveRecord::Migration
def self.up
create_table :people do |t|
t.string :first_name
t.string :last_name
t.integer :address_id
t.string :email
t.timestamps
end
end
def self.down
drop_table :people
end
end
class CreatePhoneNumbers < ActiveRecord::Migration
def self.up
create_table :phone_numbers do |t|
t.string :number, :limit => 10
t.string :extension, :limit => 5
t.string :description, :null => false
t.integer :telephone_id
t.string :telephone_type
t.timestamps
end
end
def self.down
drop_table :phone_numbers
end
end
模式
class Person < ActiveRecord::Base
has_one :address, :as => :addressable, :dependent => :destroy
has_many :phone_numbers,
:as => :telephone,
:dependent => :destroy
accepts_nested_attributes_for :phone_numbers
attr_protected :id
validates_presence_of :first_name, :last_name, :email
end
class PhoneNumber < ActiveRecord::Base
attr_protected :id
belongs_to :telephone, :polymorphic => true
end
查看
<% form_for @person, :builder => CustomFormBuilder do |f| %>
<%= f.error_messages %>
<%= f.text_field :first_name %>
<%= f.text_field :last_name %>
<% fields_for "person[address]", @person.address, :builder => CustomFormBuilder do |ff| %>
<%= ff.text_field :address_1 %>
<%= ff.text_field :address_2 %>
<%= ff.text_field :city %>
<%= ff.text_field :state %>
<%= ff.text_field :zip %>
<% end %>
<h2>Phone Numbers</h2>
<% @person.phone_numbers.each do |phone_number| %>
<% fields_for "person[phone_numbers][]", phone_number, :builder => CustomFormBuilder do |ff| %>
<%= ff.text_field :description %>
<%= ff.text_field :number %>
<%= ff.text_field :extension %>
<% end %>
<% end %>
<%= f.text_field :email %>
<%= f.submit 'Create' %>
<% end %>
控制器
def new
@person = Person.new
@person.build_address
@person.phone_numbers.build
respond_to { |format| format.html }
end
def create
@person = Person.new(params[:person])
respond_to do |format|
if @person.save
flash[:notice] = "#{@person.name} was successfully created."
format.html { redirect_to(@person) }
else
format.html { render :action => 'new' }
end
end
end
我已经验证正在创建一个PHONE_NUMBERS =方法,但后还是引起了:
PhoneNumber(#69088460) expected, got HashWithIndifferentAccess(#32603050)
RAILS_ROOT: H:/projects/test_project
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/associations/association_proxy.rb:263:in `raise_on_type_mismatch'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/associations/association_collection.rb:319:in `replace'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/associations/association_collection.rb:319:in `each'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/associations/association_collection.rb:319:in `replace'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/associations.rb:1290:in `phone_numbers='
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/base.rb:2740:in `send'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/base.rb:2740:in `attributes='
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/base.rb:2736:in `each'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/base.rb:2736:in `attributes='
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/base.rb:2434:in `initialize'
H:/projects/salesguide/app/controllers/accounts_controller.rb:46:in `new'
H:/projects/test_project/app/controllers/accounts_controller.rb:46:in `create'
我能得到这个通过手动写PHONE_NUMBERS =方法来工作,但这会造成巨大的工作重复,我宁愿学习如何做到这一点。任何人都可以看到我在做什么错了吗?
我不敢相信,在我查阅的所有文档中,没有更清楚地指出。谢谢。 – 2009-09-17 22:42:35