來自關聯的訪問屬性

Question

我有一個客戶和發票模型。客戶有許多發票和發票屬於客戶。

class Customer < ActiveRecord::Base 
attr_accessible :billing_address, :customer_currency, :email, :first_name, :last_name, :mobile, :name, :payment_terms, :phase_type, :pays_vat 
validates_presence_of :first_name, :last_name, :mobile, :billing_address, :payment_terms, :phase_type, :customer_currency 

has_many :invoices 

validates :email, 
     :presence => true, 
     :uniqueness => true, 
     :email_format => true 

validates :name, :mobile, :presence => true, :uniqueness => true 
end 

發票型號是

class Invoice < ActiveRecord::Base 
belongs_to :customer 
attr_accessible :approved_by, :due_date, :invoice_date, :terms, :customer_id, :customer 

validates :invoice_date, presence: true 
validates :due_date, presence: true 
validates :customer, presence: true 

我試圖創建一個索引頁，其中列出了系統中所有的發票，這將發票顯示誰發票所屬的客戶名稱。我如何檢索並在我的模型和視圖中清楚地描述它？

Answer 1

我認爲您已經創建了客戶和發票控制器和視圖（如果不通過generate scaffold）。在意見\發票\ index.html.erb然後列出發票：

<table> 
    <tr> 
    <th>Invoice</th> 
    <th>Customer/th> 
    </tr> 
<% @invoices.each do |invoice| %> 
    <tr> 
    <td><%= invoice.num %></td> 
    <td><%= invoice.customer.first_name %></td> 
    </tr> 
<% end %> 
</table> 

當然，你應該在控制器聲明@invoices/invoices_controller.rb

def index 
    @invoices = Invoice.includes(:customer).all 
end