Rails应用中的AssociationTypeMismatch(对象预期,获得了HashWithIndifferentAccess) [英] AssociationTypeMismatch (Object expected, got HashWithIndifferentAccess) in Rails app
问题描述
我遇到了AssociationTypeMismatch错误,并且不确定在哪里出错.我对Rails很陌生,所以我猜我在犯一些愚蠢的错误.我已经检查了语法并将其与在Ruby on Rails应用上的AssociationTypeMismatch错误
I'm getting a AssociationTypeMismatch Error and I'm not sure where I'm making a mistake. I'm pretty new to Rails so I'm guessing I'm making some silly mistake. I've checked my syntax and compared it against AssociationTypeMismatch Error on Ruby on Rails app
...但是我似乎仍然无法捕捉到错误.
... but I still can't seem to catch the error.
这是我的模特
class User < ActiveRecord::Base
attr_accessible :email, :full_name, :password, :password_confirmation, :preference
has_secure_password
validates_uniqueness_of :email
validates_presence_of :full_name
has_one :preference, :dependent => :destroy
accepts_nested_attributes_for :preference
end
class Preference < ActiveRecord::Base
attr_accessible :background_fill, :background_position, :layout
belongs_to :user
end
这是我的控制器:
def new
@user = User.new
@user.build_preference
end
def create
@user = User.new(params[:user])
if @user.save
session[:user_id] = @user.id
redirect_to root_url, notice: "Thanks for signing up!"
else
render "new"
end
end
这是我的观点
<%= form_for @user do |f| %>
<% if @user.errors.any? %>
<div class="error_messages">
<h2>There's an error!</h2>
<ul>
<% @user.errors.full_message.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<%= f.label :full_name %>
<%= f.text_field :full_name, :class => "target", :placeholder => "Your full name", :maxlength => "55", :autofocus => "autofocus" %>
<%= f.label :email %>
<%= f.email_field :email, :class => "target", :placeholder => "example@gmail.com", :maxlength => "55" %>
<%= f.label :password %>
<%= f.password_field :password, :class => "target", :placeholder => "Enter a password", :maxlength => "55" %>
<%= f.label :password_confirmation, "Confirmation" %>
<%= f.password_field :password_confirmation, :class => "target", :placeholder => "Enter your password again", :maxlength => "55" %>
<%= f.fields_for :preference do |builder| %>
<%= builder.hidden_field :layout, value: params[:layout] %>
<%= builder.hidden_field :background_fill, value: params[:background_fill] %>
<%= builder.hidden_field :background_position, value: params[:background_position] %>
<% end %>
<%= f.submit "Create an Account", :class => "button cta" %>
<% end %>
我的参数
{"utf8"=>"✓",
"authenticity_token"=>"[redacted]=",
"user"=>{"full_name"=>"test",
"email"=>"test@example.com",
"password"=>"[FILTERED]",
"password_confirmation"=>"[FILTERED]",
"preference"=>{"layout"=>"layout-3",
"background_fill"=>"restaurant-2",
"background_position"=>"position-center"}},
"commit"=>"Create an Account"}
修改:
我得到的错误是Preference(#70124732528700) expected, got ActiveSupport::HashWithIndifferentAccess(#70124687315200)
.我的理解是@user.build_preference
和accepts_nested_attributes_for :preference
只能单独工作.
The error I get is Preference(#70124732528700) expected, got ActiveSupport::HashWithIndifferentAccess(#70124687315200)
. My understanding is that @user.build_preference
and accepts_nested_attributes_for :preference
would just work on its own.
我是否需要创建一个def preferences_attributes=
?
http://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html#method-i-fields_for
Do I need to create a def preferences_attributes=
as per?
http://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html#method-i-fields_for
更新 好吧,我想我离这儿越来越近了.在Rails控制台中四处寻找,我认为需要先在UserController中创建Preference.new,然后才能传递哈希值.由于我不确定build_preference到底能做什么,所以我还没有运气.
Update Okay so I think I'm getting a bit closer. Poking around in the rails console, I figured I need to create Preference.new inside the UserController before I can pass in the hash. Since I'm not sure sure what build_preference does exactly, I'm not having any luck yet.
我尝试在构建首选项上方添加@user.preference = Preference.new
并将f.field_for :preference
更改为f.field_for @user.preference
,但是我仍然遇到相同的错误.
I've tried adding @user.preference = Preference.new
above build preference and changing f.field_for :preference
to f.field_for @user.preference
but I'm still getting the same error.
更新2
对于陷在此问题上的其他人,答案是将f.field_for :preference
更改为f.field_for :preference_attributes
.参见 zetetic 下方的评论.
Update 2
For anyone else that's stuck on this problem, the answer is to change f.field_for :preference
to f.field_for :preference_attributes
. See comment below by zetetic.
推荐答案
它是:
attr_accessible :preference_attributes
以及您的表单:
<%= f.fields_for :preference_attributes do |builder| %>
...
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