我有一个Bill
对象,它有很多Due
对象。该Due
对象也属于一个Person
。我想要一个可以在一个页面中创建Bill
及其子项的表单。Dues
我正在尝试使用嵌套属性创建一个表单,类似于这个 Railscast中的那些。
相关代码如下:
到期.rb
class Due < ActiveRecord::Base
belongs_to :person
belongs_to :bill
end
账单.rb
class Bill < ActiveRecord::Base
has_many :dues, :dependent => :destroy
accepts_nested_attributes_for :dues, :allow_destroy => true
end
bills_controller.rb
# GET /bills/new
def new
@bill = Bill.new
3.times { @bill.dues.build }
end
账单/_form.html.erb
<%= form_for(@bill) do |f| %>
<div class="field">
<%= f.label :company %><br />
<%= f.text_field :company %>
</div>
<div class="field">
<%= f.label :month %><br />
<%= f.text_field :month %>
</div>
<div class="field">
<%= f.label :year %><br />
<%= f.number_field :year %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<%= f.fields_for :dues do |builder| %>
<%= render 'due_fields', :f => builder %>
<% end %>
<% end %>
账单/_due_fields.html.erb
<div>
<%= f.label :amount, "Amount" %>
<%= f.text_field :amount %>
<br>
<%= f.label :person_id, "Renter" %>
<%= f.text_field :person_id %>
</div>
更新 bills_controller.rb 这行得通!
def bill_params
params
.require(:bill)
.permit(:company, :month, :year, dues_attributes: [:amount, :person_id])
end
正确的字段在页面上呈现(尽管还没有下拉菜单Person
)并且提交成功。但是,没有一个孩子的会费被保存到数据库中,并且在服务器日志中抛出了一个错误:
Unpermitted parameters: dues_attributes
就在错误之前,日志显示如下:
Started POST "/bills" for 127.0.0.1 at 2013-04-10 00:16:37 -0700
Processing by BillsController#create as HTML<br>
Parameters: {"utf8"=>"✓",
"authenticity_token"=>"ipxBOLOjx68fwvfmsMG3FecV/q/hPqUHsluBCPN2BeU=",
"bill"=>{"company"=>"Comcast", "month"=>"April ",
"year"=>"2013", "dues_attributes"=>{
"0"=>{"amount"=>"30", "person_id"=>"1"},
"1"=>{"amount"=>"30", "person_id"=>"2"},
"2"=>{"amount"=>"30", "person_id"=>"3"}}}, "commit"=>"Create Bill"}
Rails 4 有什么变化吗?