我有一个Forum
模型,其实例可以有许多嵌套论坛:
class Forum < ActiveRecord::Base
has_many :nested_forums,
:class_name => 'Forum',
:foreign_key => 'parent_forum_id',
:dependent => :nullify
belongs_to :parent_forum,
:class_name => 'Forum'
end
我的路线是这样的:
# Standard resource routes
GET /forums/:id => 'forums#show'
# ...
GET /forums/:forum_id/nested_forums/new => 'Forums/nested_forums#new'
POST /forums/:forum_id/nested_forums => 'forums/nested_forums#create'
现在,在控制器中:
class Forums::NestedForumsController < ApplicationController
expose(:forum) # Will find with :forum_id
expose(:nested_forums) { forum.nested_forums }
expose(:nested_forum) # Main issue here
end
在该:create
操作中,该行生成的代码expose(:nested_forum)
将尝试使用params[:nested_forum]
. 这是一个尴尬的情况,因为我使用的是自联接并且没有NestedForum
模型,而且似乎没有办法告诉decent_exposure
.
处理这种情况的好方法是什么?