我一直在这一天卡住了一天。我听说过Rails能够处理这样简单的复杂性的所有这些话题(尽管这不是/不应该是复杂的)。Rails 3 has_many通过复选框形式不(不)工作
故事:用户可以有很多高级学位。我希望能够通过has_many through关系创建该关联,并在我的视图中使用复选框。
型号:
class User < ActiveRecord::Base
has_many :user_degree_lists
has_many :degrees, :through => :user_degree_lists, :source => :advanced_degree, :dependent => :destroy
end
class AdvancedDegree < ActiveRecord::Base
attr_accessible :value, :description
has_many :user_degree_lists
end
class UserDegreeList < ActiveRecord::Base
belongs_to :user
belongs_to :advanced_degree
end
的ActiveRecord:
class CreateUserDegreeLists < ActiveRecord::Migration
def self.up
create_table :user_degree_lists do |t|
t.integer :user_id
t.integer :advanced_degree_id
t.timestamps
end
add_index :user_degree_lists, :user_id
add_index :user_degree_lists, :advanced_degree_id
add_index :user_degree_lists, [:user_id, :advanced_degree_id], :unique => true
end
def self.down
drop_table :user_degree_lists
end
end
查看:
<%= form_for(@user, :html => {:autocomplete => 'off', :id => "sign_up_user" }) do |f| %>
...
<% for advanced_degree in AdvancedDegree.find(:all)%>
<%= check_box_tag "user[advanced_degree_ids][]", advanced_degree.id, @user.degrees.include? (advanced_degree.id) %>
<%= f.label :advanced_degrees, advanced_degree.description %>
...
<% end %>
一旦提交表单,所有用户字段被更新,但:user_degree_lists关系不创建。
我在这里做错了什么?
你是如何解决它的? – sparkle 2013-07-03 18:52:38