Question

我正在使用ryan bates的插件nested_form，我一直在尝试为has_many：through关系编写我的表单。

我有3个型号：

Profile
  has_many :memberships
  has_many :organizations, :through => :memberships
  accepts_attributes_for :organizations
  attr_accessible :organization_attribtues
Membership
  has_many :profiles
  has_many :organizations
Organization
  has_many :memberships
  has_many :profiles, :though => :memberships

以下表单适用于配置文件，但组织嵌套在其中。我可以通过f.fields_for：组织创建有关组织的信息，但后来我不清楚如何更新特定于组织成员身份的信息。具体来说，在成员资格表上有一个title属性（我在下面评论它，因为它会为组织抛出一个错误的未定义方法`title'）。任何帮助都会非常感激！谢谢。

= f.fields_for :organisations do |org|
    = org.input :name, :label => "<strong>Name of the Organization</strong>"
    = org.input :title, :label => "Your role"
    = org.input :description, :as => :text, :label => "Description of the organization",

Answer 1

正如我在StackOverflow上看到的另一个问题，我需要嵌套hm =＆gt;是这样的

= f.fields_for :memberships do |mem|
= mem.fields_for :organisation do |org|
  .row
    .span5.org_name
      = org.input :name, :label => "<strong>Name of the Organization</strong>"
    .span5
      = mem.input :title, :label => "<strong>Title in the Organization</strong>"
  .row
    .span5
      = mem.input :starting_year, :label => "<strong>Starting Year</strong>"
    .span5
      = mem.input :ending_year, :label => "<strong>Ending Year</strong>"
  .row
    .span10
      = org.text_area :description, :label => "<strong>Description of Organisation</strong>"
= mem.link_to_remove "Remove this oranisation"
= f.link_to_add "Add an organisation", :memberships

对于Ryan Bates的插件，与会员组织的关联并不是我所知道的，所以我创建了一个这样的新方法：

     = f.link_to_add_hmt "Add an organisation", :organisation, :memberships

然后我几乎只是简单地复制了Ryan Bates的插件，添加了一个新的参数，在下面添加了2行

def link_to_add_hmt(*args, &block)
  options = args.extract_options!.symbolize_keys
  association = args.pop
  association_two = args.pop
  options[:class] = [options[:class], "add_nested_fields"].compact.join(" ")
  options["data-association"] = association
  args << (options.delete(:href) || "javascript:void(0)")
  args << options
  @fields ||= {}
  @template.after_nested_form(association) do
    model_object = object.class.reflect_on_association(association).klass.new
    model_object.send(:"build_#{association_two}")
    output = %Q[<div id="#{association}_fields_blueprint" style="display: none">].html_safe
    output << fields_for(association, model_object, :child_index => "new_#{association}", &@fields[association])
    output.safe_concat('</div>')
    output
  end 
  @template.link_to(*args, &block)
end

查找对“association_two”的引用。这很棒！

Answer 2

更新了最新版本的nested_form

https://gist.github.com/stuartchaney/7274894

nested_form，has_many：through，更新连接模型的属性

2 个答案: