多重嵌套形式

Question

我已经实现了基于Ryan Bates Screen Cast的复杂嵌套形式。

我修整有相同的形式

一个是CUTOMER的联系人和其他客户的约会

为2种嵌套形式我有

患者模型

class Patient < ActiveRecord::Base 
    has_many :contacts, :dependent => :destroy 
    accepts_nested_attributes_for :contacts, :reject_if => lambda { |a| a[:content].blank? }, :allow_destroy => true 

    has_many :appointments, :dependent => :destroy 
    accepts_nested_attributes_for :appointments, :reject_if => lambda { |a| a[:content].blank? }, :allow_destroy => true 
end 

contact model

class Contact < ActiveRecord::Base 
    belongs_to :patient 
end 

预约模型

class Appointment < ActiveRecord::Base 
    belongs_to :patient 
end 

appointment_fields局部形式

<div class="fields"> 
     Appointment: <%= f.datetime_select :appointment_date %> 
     <%= link_to_remove_fields "remove", f%><br /> 
</div> 

contact_fields局部形式

<div class="fields"> 
     Contact: <%= f.text_field :contact_type %> 
     <%= f.text_field :content %> 
     <%= link_to_remove_fields "remove", f%><br /> 
</div> 

患者_form局部

Edited to show only the formfields 

    <%= f.fields_for :contacts do |builder| %> 
     <%= render "contact_fields", :f => builder %> 
    <% end %> 

    <p><%= link_to_add_fields "Add More Contact", f, :contacts %></p> 

    <%= f.fields_for :appointments do |builder| %> 
     <%= render "appointment_fields", :f => builder %> 
    <% end %> 

    <p><%= link_to_add_fields "Add Appointment", f, :appointments %></p> 

Application_helper

module ApplicationHelper 
    def link_to_remove_fields(name, f) 
    f.hidden_field(:_destroy) + link_to_function(name, "remove_fields(this)") 
    end 

    def link_to_add_fields(name, f, association) 
    new_object = f.object.class.reflect_on_association(association).klass.new 
    fields = f.fields_for(association, new_object, :child_index => "new_#{association}") do |builder| 
     render(association.to_s.singularize + "_fields", :f => builder) 
    end 
    link_to_function(name, "add_fields(this, '#{association}', '#{escape_javascript(fields)}')") 
     end 

end 

的application.js

function remove_fields(link) { 
    $(link).prev("input[type=hidden]").val("1"); 
    $(link).closest(".fields").hide(); 
} 

function add_fields(link, association, content) { 
    var new_id = new Date().getTime(); 
    var regexp = new RegExp("new_" + association, "g"); 
    $(link).parent().before(content.replace(regexp, new_id)); 
} 

我使用的铁轨3.0.3和1.9.2的红宝石

的联系的工作，但任命没有。任何错误消息只是不运行包含语句

这里输出的时候我在表单中输入的数据，然后输入提交

Started POST "/patients" for 127.0.0.1 at 2011-09-17 16:59:46 -0700 
    Processing by PatientsController#create as HTML 
    Parameters: {"utf8"=>"✓", "authenticity_token"=>"AEhUmtE5vIMrjHYWvGWRzlDc2hKrN0nc9gXPCSlIz50=", "patient"=>{"first_name"=>"test", "middle"=>"", "last_name"=>"", "dob(1i)"=>"2011", "dob(2i)"=>"9", "dob(3i)"=>"17", "address1"=>"", "address2"=>"", "city"=>"", "state"=>"", "country"=>"", "insurance_name"=>"", "contacts_attributes"=>{"0"=>{"contact_type"=>"cell", "content"=>"999-999-9999", "_destroy"=>"false"}, "1"=>{"contact_type"=>"", "content"=>"", "_destroy"=>"false"}}, "appointments_attributes"=>{"0"=>{"appointment_date(1i)"=>"2011", "appointment_date(2i)"=>"9", "appointment_date(3i)"=>"17", "appointment_date(4i)"=>"23", "appointment_date(5i)"=>"59", "_destroy"=>"false"}}, "notes"=>""}, "commit"=>"Create Patient"} 
    SQL (0.9ms) BEGIN 
    SQL (1.2ms) describe `patients` 
    AREL (1.5ms) INSERT INTO `patients` (`first_name`, `middle`, `last_name`, `dob`, `address1`, `address2`, `city`, `state`, `country`, `notes`, `insured`, `insurance_name`, `created_at`, `updated_at`) VALUES ('test', '', '', '2011-09-17 00:00:00', '', '', '', '', '', '', NULL, '', '2011-09-17 23:59:46', '2011-09-17 23:59:46') 
    SQL (3.2ms) describe `contacts` 
    AREL (0.3ms) INSERT INTO `contacts` (`patient_id`, `contact_type`, `content`, `created_at`, `updated_at`) VALUES (8, 'cell', '999-999-9999', '2011-09-17 23:59:46', '2011-09-17 23:59:46') 
    SQL (0.4ms) COMMIT 
Redirected to http://localhost:3000/patients/8 
Completed 302 Found in 74ms 

如果我在下面的控制台模式的代码做

@patients = Patient.find_by_id(1) 
@patients.appointment 

返回[]这说明关系是正确的

哦，我想注释掉接触，但仍然能够得到它的工作

任何想法??

Answer 1

在您的患者模型中，在约会的nested_attributes_for声明中，对于不存在的“内容”属性，您有一个reject_if。

content属性不是约会的参数，它只是联系人的参数。因此，当您发送属性并且您的患者模型发现约会具有空白内容属性时，它会拒绝约会的嵌套属性。

为了解决这个问题，从appointement nested_attributes_for声明

accepts_nested_attributes_for :appointments, :allow_destroy => true 

删除reject_if条款或改变它，对已有的属性。像appointement_date一样。

让我知道这是否是问题所在。