Ruby on rails 3 如何使用Rails以嵌套形式访问模型的虚拟属性
我有一个基本的嵌套表单。我想访问嵌套表单模型的虚拟属性Ruby on rails 3 如何使用Rails以嵌套形式访问模型的虚拟属性,ruby-on-rails-3,nested-forms,virtual-attribute,Ruby On Rails 3,Nested Forms,Virtual Attribute,我有一个基本的嵌套表单。我想访问嵌套表单模型的虚拟属性 Model 1: Lease Has_many :transactions accepts_nested_attributes_for :transactions, :reject_if => lambda { |a| a[:dated].blank? }, :allow_destroy => true ... Model 2: Transaction belongs_to :lease def balan
Model 1: Lease
Has_many :transactions
accepts_nested_attributes_for :transactions, :reject_if => lambda { |a| a[:dated].blank? }, :allow_destroy => true
...
Model 2: Transaction
belongs_to :lease
def balance_to_date(aDate)
#Returns the current balance up to aDate
...
end
...
在嵌套形式中,我想放置如下内容:
<td style="width:100px;"><%= nested_f.text_field :dated, size: 8 %> </td>
<td style="width:100px;"><%= nested_f.text_field :label, size: 8 %> </td>
<td style="width:100px;"><%= nested_f.text_field :credit, size: 6 %> </td>
<td style="width:100px;"><%= nested_f.text_field :debit, size: 6 %> </td>
<td style="width:100px;"><%= nested_f.balance_to_date(:dated) %> </td>
对于如何访问和显示模型的虚拟属性以及显示当前记录的日期,我们非常感谢。我希望我没有重复前面的问题
我使用的是Rails 3.2.12和Ruby 1.9.3
谢谢!
菲尔如果我明白你想做什么,你就很接近了。只需向下钻取一个级别即可访问form builder正在使用的模型对象:
<td style="width:100px;"><%= nested_f.object.balance_to_date(:dated) %> </td>
就是这样!谢谢你,丹。我完全忘了。物体。
Dated Label Credit Debit Balance
[ 1/1/2012 ] [ Rent due ] [ ] [ 600 ] -600
[ 1/2/2012 ] [ Payment ] [ 600 ] [ ] 0
[ 2/1/2012 ] [ Rent due ] [ ] [ 600 ] -600
[ 2/2/2012 ] [ Payment ] [ 500 ] [ ] -100
[ 3/1/2012 ] [ Rent due ] [ ] [ 600 ] -700
[ 3/6/2012 ] [ late fee ] [ ] [ 50 ] -750
[ 3/7/2012 ] [ Payment ] [ 800 ] [ ] 50
[ 4/1/2012 ] [ Rent due ] [ ] [ 600 ] -550
<td style="width:100px;"><%= nested_f.object.balance_to_date(:dated) %> </td>