Awesome_nested_set：选择不工作的轨道
我已经尝试了我能想到的所有方法，但它们似乎都不起作用：
f.select :destination_group_id, options_for_select(nested_set_options(DestinationGroup) {|i| "#{'-' * i.level} #{i.name}" }, :selected => @purchase.destination_group_id)
select_tag 'purchases[destination_group_id]', options_for_select(nested_set_options(DestinationGroup) {|i| "#{'-' * i.level} #{i.name}" }, :selected => @purchase.destination_group_id)
f.select :destination_group_id, options_for_select(nested_set_options(DestinationGroup) {|i| "#{'-' * i.level} #{i.name}" }, :selected => @purchase)
f.select :destination_group_id, options_for_select(nested_set_options(DestinationGroup) {|i| "#{'-' * i.level} #{i.name}" }), :selected => @purchase.destination_group_id
f.select :destination_group_id, nested_set_options(DestinationGroup) {|i| "#{'-' * i.level} #{i.name}" }), :selected => @purchase.destination_group_id
以及我能想到的几乎所有其他方法
如何让它在与编辑匹配的选项中选择destination_group_id值？
I have tried this all the ways I can think of, but none of them seem to be working:
f.select :destination_group_id, options_for_select(nested_set_options(DestinationGroup) {|i| "#{'-' * i.level} #{i.name}" }, :selected => @purchase.destination_group_id)
select_tag 'purchases[destination_group_id]', options_for_select(nested_set_options(DestinationGroup) {|i| "#{'-' * i.level} #{i.name}" }, :selected => @purchase.destination_group_id)
f.select :destination_group_id, options_for_select(nested_set_options(DestinationGroup) {|i| "#{'-' * i.level} #{i.name}" }, :selected => @purchase)
f.select :destination_group_id, options_for_select(nested_set_options(DestinationGroup) {|i| "#{'-' * i.level} #{i.name}" }), :selected => @purchase.destination_group_id
f.select :destination_group_id, nested_set_options(DestinationGroup) {|i| "#{'-' * i.level} #{i.name}" }), :selected => @purchase.destination_group_id
and pretty much every other way I can think of
How do I get it to select the destination_group_id value in the option that matches for the edit?
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我会删除它，因为我现在觉得很愚蠢，但我会把它留给遇到同样问题的任何人。
我将值存储为整数，并且选择正在寻找字符串。
I would delete this because I feel stupid now, but I will leave it for anyone that comes across it with the same problem.
I had the values stored as integers, and the select was looking for a string.