与mongoid的轨道3嵌套属性问题(嵌套的对象不保存)
问题描述:
所以我有一个简单的应用程序,如RailsCast about nested forms.和一个问题是,当我提交表格(与调查和问题)问题不保存。与mongoid的轨道3嵌套属性问题(嵌套的对象不保存)
我的模型(调查中,有许多问题):
class Survey
include Mongoid::Document
field :name
has_many :questions, :dependent => :destroy
accepts_nested_attributes_for :questions, :allow_destroy => true
end
class Question
include Mongoid::Document
field :content
belongs_to :survey
end
和测量控制器:
def new
@survey = Survey.new
3.times {@survey.questions.build}
....
和视图:
<%= form_for(@survey) do |f| %>
<%= f.fields_for :questions do |builder| %>
<%= builder.label :content, "Question" %><br />
<%= builder.text_area :content, :rows => 3 %><br />
<%= builder.check_box :_destroy %>
<%= builder.label :_destroy, "Remove Question" %>
<% end %>
...
在我的日志,我有:
Started POST "/surveys" for 127.0.0.1 at 2011-05-24 13:26:51 +0400
Processing by SurveysController#create as HTML
Parameters: {"utf8"=>"G£ô", "authenticity_token"=>"tX0FfMiLbh1BwjuY4CuvAKt2UpTraY3vmdo58ocBnos=", "survey"=>{"name"=>"
Rails", "questions_attributes"=>{"0"=>{"content"=>"Are you fond of Rails?", "_destroy"=>"0"}, "1"=>{"content"=>"Rails is
the best, ha?", "_destroy"=>"0"}, "2"=>{"content"=>"How many railscasts have you watched?", "_destroy"=>"0"}}}, "commit
"=>"Create Survey"}
MONGODB nested_attributes_development['surveys'].insert([{"name"=>"Rails", "_id"=>BSON::ObjectId('4ddb79dba5372914380000
69')}])
Redirected to http://localhost:3000/surveys/4ddb79dba537291438000069
答
答案在谷歌群被发现,所以我只是复制它:
MONGODB
nested_attributes_development['surveys'].insert([{"name"=>"Rails",
"_id"=>BSON::ObjectId('4ddb79dba5372914380000
69')}])
这不保存质疑这是不符合默认 mongoid做收藏。 只需添加has_many:questions,:dependent =>:destroy,:autosave => true 这应该有效。
cf. http://mongoid.org/docs/upgrading.html了解更多详情。