Awesome_nested_set 在选择中复制子项

Question

我在选择中遇到 Awesome_nested_set 复制子项的问题（如标题所示）

我在表中有以下数据（phpmyadmin 在字段周围加引号）：

id      name            parent_id   lft    rgt      created_at              updated_at
"12" "BNW"      NULL     "1"     "8"     "2010-12-01 22:23:36" "2010-12-01 22:23:36"
"13" "NYSSA"      "12"     "2"     "3"     "2010-12-01 22:23:48" "2010-12-01 22:25:12"
"14" "BOARDMAN"     "12"     "4"     "5"     "2010-12-01 22:25:28" "2010-12-01 22:25:28"
"15" "QUINCY"     "12"     "6"     "7"     "2010-12-01 22:25:37" "2010-12-01 22:25:37"
"16" "WCC"      NULL     "9"     "16" "2010-12-02 18:08:00" "2010-12-02 18:08:00"
"17" "CALIFORNIA" "16"     "10" "11" "2010-12-02 18:08:08" "2010-12-02 18:08:08"
"18" "NORTH POWDER" "16"     "12" "13" "2010-12-02 18:08:16" "2010-12-02 18:08:16"
"19" "ELLENSBURG" "16"     "14" "15" "2010-12-02 18:08:25" "2010-12-02 18:08:25"

模型：

class DestinationGroup < ActiveRecord::Base
  acts_as_audited
  has_one :purchase
  acts_as_nested_set
end

控制器：

class PurchasesController < ApplicationController
  def new
    @destination_groups = DestinationGroup.all
    ...
  end
...

视图：

= f.select :destination_group_id, options_for_select(nested_set_options(@destination_groups) {|i| "#{'-' * i.level} #{i.name}" } )

如果您需要更多信息，我可以发布它，但我认为这就是与问题真正相关的全部内容。

编辑：

我得到这个html：

<select id="purchase_destination_group_id" name="purchase[destination_group_id]">
  <option value="12"> BNW</option> 
  <option value="13">- NYSSA</option> 
  <option value="14">- BOARDMAN</option> 
  <option value="15">- QUINCY</option> 
  <option value="13">- NYSSA</option> 
  <option value="14">- BOARDMAN</option> 
  <option value="15">- QUINCY</option> 
  <option value="16"> WCC</option> 
  <option value="17">- CALIFORNIA</option> 
  <option value="18">- NORTH POWDER</option> 
  <option value="19">- ELLENSBURG</option> 
  <option value="17">- CALIFORNIA</option> 
  <option value="18">- NORTH POWDER</option> 
  <option value="19">- ELLENSBURG</option>
</select> 

编辑2

这变得更奇怪：

DestinationGroup.all.collect{|i| "#{'-' * i.level} #{i.name}" }
=> [" BNW", "- NYSSA", "- BOARDMAN", "- QUINCY", " WCC", "- CALIFORNIA", "- NORTH POWDER", "- ELLENSBURG"]

这显然效果很好。

我在视图中这样做了：

= "<!-- #{@destination_groups.inspect} -->"

<!-- 
  [
  #<DestinationGroup id: 12, name: "BNW", parent_id: nil, lft: 1, rgt: 8, created_at: "2010-12-01 22:23:36", updated_at: "2010-12-01 22:23:36">, 
  #<DestinationGroup id: 13, name: "NYSSA", parent_id: 12, lft: 2, rgt: 3, created_at: "2010-12-01 22:23:48", updated_at: "2010-12-01 22:25:12">, 
  #<DestinationGroup id: 14, name: "BOARDMAN", parent_id: 12, lft: 4, rgt: 5, created_at: "2010-12-01 22:25:28", updated_at: "2010-12-01 22:25:28">, 
  #<DestinationGroup id: 15, name: "QUINCY", parent_id: 12, lft: 6, rgt: 7, created_at: "2010-12-01 22:25:37", updated_at: "2010-12-01 22:25:37">, 
  #<DestinationGroup id: 16, name: "WCC", parent_id: nil, lft: 9, rgt: 16, created_at: "2010-12-02 18:08:00", updated_at: "2010-12-02 18:08:00">, 
  #<DestinationGroup id: 17, name: "CALIFORNIA", parent_id: 16, lft: 10, rgt: 11, created_at: "2010-12-02 18:08:08", updated_at: "2010-12-02 18:08:08">, 
  #<DestinationGroup id: 18, name: "NORTH POWDER", parent_id: 16, lft: 12, rgt: 13, created_at: "2010-12-02 18:08:16", updated_at: "2010-12-02 18:08:16">, 
  #<DestinationGroup id: 19, name: "ELLENSBURG", parent_id: 16, lft: 14, rgt: 15, created_at: "2010-12-02 18:08:25", updated_at: "2010-12-02 18:08:25">
  ] 
--> 

谢谢

Answer 1

我想通了，我正在使用：

# controller
@destination_groups = DestinationGroup.all

then:

# view
= f.select :destination_group_id, options_for_select(nested_set_options(@destination_groups) {|i| "#{'-' * i.level} #{i.name}" } )

我将其更改为：

# view
= f.select :destination_group_id, options_for_select(nested_set_options(DestinationGroup) {|i| "#{'-' * i.level} #{i.name}" } )

我猜它是从 DestinationGroup.all 复制的，无论如何它是固定的，以防有人再次遇到这个问题。