我正在尝试使用 Cocoon gem 为 Poi（兴趣点）对象创建具有嵌套属性的 Package 对象。当我创建一个新包时，我想添加现有的 Pois 来选择它们进行关联。但问题是当我创建一个新包时，我添加到这个包的 Pois 没有链接到它。因此，当我提交表单时，不会创建 package_pois 关系。
有我的代码：
class Package
has_many :package_pois
has_many :pois, :through => :package_pois, :class_name => 'Poi'
belongs_to :user
accepts_nested_attributes_for :pois
accepts_nested_attributes_for :package_pois
end
class PackagePoi
belongs_to :poi
belongs_to :package
accepts_nested_attributes_for :poi, :reject_if => :all_blank
end
包/_form.html.erb
<div id="package">
<%= f.simple_fields_for :package_pois do |poi| %>
<%= render 'package_poi_fields', :f => poi %>
<% end %>
<%= link_to_add_association 'dd poi', f, :package_pois %>
</div>
包/ackage_poi_fields.html.erb
<div class="nested-fields package-poi-fields">
<div id="pacakge_form_list">
<%= f.association :poi, :collection => Poi.all(:order => 'title'), :prompt => 'Add existing poi' %>
</div>
<%= link_to_remove_association "Remove poi", f %>
</div>
和 package-new.js：
$("#package a.add_fields").
data("association-insertion-position", 'before').
data("association-insertion-node", 'this');
$('#package').bind('insertion-callback',
function() {
$(".package-poi-fields a.add_fields").
data("association-insertion-position", 'before').
data("association-insertion-node", 'this');
$('.package-poi-fields').bind('insertion-callback',
function() {
$(this).children("#pacakge_form_list").remove();
$(this).children("a.add_fields").hide();
});
});
为什么它不创建 package_pois 关联？我能做什么？谢谢