Question

更新

我的节目功能

def show
@contact = Contact.find(params[:id])
@data = Register.all :include => {:session =>[:term, :course]}  , :conditions => ["contact_id = ?", params[:id]]
respond_to do |format|
  format.html # show.html.erb
  format.xml  { render :xml => @contact }
end

端

模型

class Register < ActiveRecord::Base
 belongs_to :session
 belongs_to :contact
end

class Session < ActiveRecord::Base
 belongs_to :term  
 belongs_to :course
 has_many :registers
 has_many :contacts, :through => :registers
end

嗨，

我对铁轨上的红宝石有点新意。我想显示以下内容 -

- !ruby/object:Register 
attributes: 
 created_at: 2010-06-20 11:39:06
 updated_at: 2010-06-20 11:39:06
 session_id: "32"
 contact_id: "601"
 id: "1"
attributes_cache: {}

session: !ruby/object:Session 
attributes: 
  created_at: 2010-06-19 10:16:13
  term_id: "26"
  updated_at: 2010-06-19 10:16:13
  id: "32"
  course_id: "4"
attributes_cache: {}

course: !ruby/object:Course 
  attributes: 
    created_at: 2010-05-30 14:36:24
    updated_at: 2010-05-30 14:36:28
    course_name: Beginner
    id: "4"
    course_type: Running
  attributes_cache: {}

term: &id001 !ruby/object:Term 
  attributes: 
    number: "1"
    start_date: "2010-06-19"
    created_at: 2010-06-19 10:16:13
    updated_at: 2010-06-19 10:16:13
    id: "26"
  attributes_cache: {}

我认为我做错了

    <% @data.Register.each do |c| %>
    <tr>
        <td><%=h c.Term.number %></td>
        <td><%=h c.Course.course_name %></td>
   </tr>
   <% end %>

由于

Answer 1

Ruby on Rails约定是类是大写的，类的实例不是。

如果模型注册包含声明

has_one term

然后您可以使用

访问该术语

registration = Registration.find xxx  # get an instance of the Registration model
registration.term # access the associated term model
                  # do not use registration.Term

因此...

1）您需要向我们展示您的控制器代码。你的ActiveRecord类文件 - 你是否使用belongs_to，has_many声明正确定义了关系？

2）你的sw应该更像：

# Controller
def show
   # Shows all the registrations for person_id
   # args: params['person_id']
   @registrations = Register.find_all_by_person_id(params['person_id'].to_i_
end

# View 

<% @registrations.each do |r| %>
<tr>
    <td><%=h r.term.number %></td>
    <td><%=h r.course.course_name %></td>
</tr>
<% end %>

ADDED

另外，要非常小心命名模型“会话” - 潜在的问题是，如果启用了db-backed会话，CGI会话可能会存储到模型会话中。

Ruby显示对象

1 个答案: