型號:不能得到對象屬性
class Car < ActiveRecord::Base
...
belongs_to :manufacturer
...
end
class Manufacturer < ActiveRecord::Base
...
has_many :cars
...
end
車控制器:
def index
@title = "All cars"
@cars = Car.paginate(:page => params[:page], :per_page => 20)
end
查看:
<%= car.manufacturer.name %>
表演:未定義的方法'名」的零:NilClass
好。查看:
<%= car.manufacturer[name] %>
表演:0x460c488>
但是:對#<#未定義的局部變量或方法'名」!查看:
<%= car.manufacturer.to_yaml %>
表演:
--- !ruby/object:Manufacturer
attributes:
id: 1
name: Acura
created_at: 2011-11-30 09:59:19.750976000 Z
updated_at: 2011-12-06 10:38:46.569531000 Z
因此,如何能我讀Car.manufacturer的名字嗎?
你'belongs_to的:model',不'belongs_to的:manufacturer'。這是一個抄寫錯誤嗎? – Chowlett 2012-04-17 13:25:03
固定,thx。汽車同時擁有:型號和製造商 – bravedick 2012-04-17 13:26:16
'car.manufacturer [name]'無論如何都是錯誤的,您可能想要'car.manufacturer [:name]' – Achilles 2012-04-17 14:56:06