为什么accepts_nested_attributes_for对我不起作用? (导轨3) [英] Why is accepts_nested_attributes_for not working for me? (rails 3)
问题描述
我在Rails 3应用程序上使用formtastic和haml.我正在尝试为调查和问题创建一个嵌套表格,但是它对我不起作用.我已经看过railscast及其相关内容,但似乎无法使其适用于我的应用程序.所以,现在,我有以下内容:
I'm using formtastic and haml on a Rails 3 application. I'm trying to make a nested form for surveys and questions, but it's just not working for me. I've watched the railscast and on it and everything, but I can't seem to make it work for my application. So right now, I have the following:
模型
class Survey < ActiveRecord::Base
attr_accessible :intro, :name, :pubdate, :enddate, :pubid
belongs_to :user
has_many :questions, :dependent => :destroy, :autosave => true
accepts_nested_attributes_for :questions, :allow_destroy => true
end
class Question < ActiveRecord::Base
belongs_to :survey
has_many :answers, :dependent => :destroy
attr_accessible :q_text, :order, :q_type
end
相关控制器方法
def update
@survey = Survey.find(params[:id])
@user = current_user
if check_auth_and_redirect @user, @survey
if @survey.update_attributes(params[:survey])
flash[:success] = "Survey Updated"
redirect_to edit_survey_path(@survey)
else
@title = "Editing Survey #{@survey.id}"
render 'edit'
end
end
end
观看次数
= semantic_form_for @survey do |f|
= render "shared/survey_inputs", :object => f
= f.inputs :for => :questions, :name => "Survey Questions" do |fq|
%hr
= fq.input :q_text, :label => "Question text"
= fq.input :q_type,
:label => "Question type",
:as => :select,
:collection => %w(text scale radio select)
= fq.input :order, :label => "Question order"
该表单可以正确显示,但是当我更改问题并单击保存"时,记录不会反映我的更改.我确实打开了debug(params),这就是它的返回结果:
The form renders correctly, but when I change a question and click save, the records doesn't reflect my changes. I do have debug(params) turned on, and here is what it comes back as:
--- !map:ActiveSupport::HashWithIndifferentAccess
utf8: "\xE2\x9C\x93"
_method: put
authenticity_token: CJCc9LvdoPjxwGJkhUnZjR0Z/c5Wt5VBT3bBr/wB4+A=
survey: !map:ActiveSupport::HashWithIndifferentAccess
name: This is my survey
intro: I've got a lovely bunch of coconuts. There they are all standing in a row.
pubid: smargdab
pubdate(1i): ""
pubdate(2i): ""
pubdate(3i): ""
enddate(1i): ""
enddate(2i): ""
enddate(3i): ""
questions_attributes: !map:ActiveSupport::HashWithIndifferentAccess
"0": !map:ActiveSupport::HashWithIndifferentAccess
q_text: one one one one one one one one one one one
q_type: text
order: "3"
id: "1"
"1": !map:ActiveSupport::HashWithIndifferentAccess
q_text: 2 2 2 2 2 2 2 2 2 2
q_type: text
order: "1"
id: "2"
"2": !map:ActiveSupport::HashWithIndifferentAccess
q_text: 3 3 3 3 3 3 3 3 3 3
q_type: text
order: "2"
id: "3"
commit: Update Survey
action: update
controller: surveys
id: "2"
我在这里做错了什么?我不想手动编写这些属性更改器!
What am I doing wrong here? I don't want to have to write these attribute changers manually!
推荐答案
我正在查看我的一些使用accepts_nested_attributes_for的旧代码,我认为您需要做的就是改变
I am looking at some old code of mine that uses accepts_nested_attributes_for and I think what you need to do is change
attr_accessible :intro, :name, :pubdate, :enddate, :pubid
到
attr_accessible :intro, :name, :pubdate, :enddate, :pubid, :questions_attributes
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