【发布时间】：2014-09-02 01:27:19
【问题描述】：
我在两个模型之间有 belongs_to 和 has_many 关联。我有一个用户创建表单，它创建用户并在此过程中创建一个组织并将两者关联起来。我对是否存在组织名称进行了验证。如果验证失败，我希望Organiation 将Name cannot be blank 错误添加到User 具有的相同错误消息哈希中。基本上，创建一个错误消息列表。
这是我的模型：
class User < ActiveRecord::Base
devise :database_authenticatable, :registerable, :recoverable, :rememberable, :trackable, :validatable, :confirmable, :lockable, :timeoutable
belongs_to :organization
validates_presence_of :display_name
end
class Organization < ActiveRecord::Base
has_many :users, dependent: :destroy
accepts_nested_attributes_for :users, :allow_destroy => true
validates_presence_of :name
end
这是我的创建操作：
def create
@user = User.new(sign_up_params)
if params[:user][:organization][:access_code].blank?
# create new organization
@access_code = "#{SecureRandom.urlsafe_base64(16)}#{Time.now.to_i}"
@organization = Organization.create(name: params[:user][:organization][:name], access_code: @access_code)
@user.organization_id = @organization.id
@user.is_admin = true
else
# try and add someone to an organization
@organization = Organization.find(:all, conditions: ["name = ? AND access_code = ?", params[:user][:organization][:name], params[:user][:organization][:access_code]])
if @organization.empty?
flash.now[:error] = "No organization has been found with that name and access code."
render :new
return
else
@user.organization_id = @organization.first.id
end
end
if @user.save
flash[:success] = "Your account has been successfully created! Check your email for a confirmation link to activate your account."
redirect_to sign_in_path
else
flash.now[:error] = "Something went wrong! Please try again."
render :new
end
end
这是我的观点：
<% provide(:title, 'Sign Up') %>
<h1>Create Account</h1>
<%= nested_form_for(resource, as: resource_name, url: registration_path(resource_name)) do |f| %>
<%= render "shared/error_messages", obj: @user %>
<fieldset>
<legend>Account Information</legend>
<div class="form-group">
<%= f.label :email %>
<%= f.email_field :email, class: "form-control", autofocus: true %>
</div>
<div class="form-group">
<%= f.label :display_name, "Display Name" %>
<%= f.text_field :display_name, class: "form-control" %>
</div>
<div class="form-group">
<%= f.label :password %> <% if @validatable %><i>(<%= @minimum_password_length %> characters minimum)</i><% end %>
<%= f.password_field :password, class: "form-control", autocomplete: "off" %>
</div>
<div class="form-group">
<%= f.label :password_confirmation %>
<%= f.password_field :password_confirmation, class: "form-control", autocomplete: "off" %>
</div>
</fieldset>
<%= f.fields_for :organization do |o| %>
<fieldset>
<legend>Organization Information</legend>
<p>
<strong>Creating a New Organization:</strong> Fill out the Organization Name field, but leave the Access Code field blank.<br />
<strong>Joining an Existing Organization:</strong> Fill out both the Organization Name and Access Code field, using the access code that you received from someone at your organization.
</p>
<div class="form-group">
<%= o.label :name, "Organization Name" %>
<%= o.text_field :name, class: "form-control" %>
</div>
<div class="form-group">
<%= o.label :access_code, "Organization Access Code" %>
<%= o.text_field :access_code, class: "form-control" %>
</div>
</fieldset>
<% end %>
<div class="form-actions">
<%= f.submit "Create Account", class: "btn btn-primary" %>
<%= link_to "Cancel", :back %>
</div>
<% end %>
<%= render "users/shared/links" %>
还有，这是error_messages 部分：
<% if obj.errors.any? %>
<div id="error_explanation">
<h2>There are <%= pluralize(obj.errors.count, "error") %> errors with this form:</h2>
<ul>
<% obj.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
User 的错误显示正常，但Organization 却没有。是否与仅将 @user 传递给部分有关？
【问题讨论】：
-
如果您只传入用户，那么您只会收到用户对象的错误消息是有道理的，对吧？在你的控制器中，与其说 flash.now[:error] = "..."，不如直接说 flash.now[:errors] = @user.errors.full_messages + @organization.errors。 full_messages?
-
flash 消息实际上与此问题无关。问题在于我通过我相信的模型设置的 ActiveModel 验证。我假设通过
@user是可以的，组织错误将通过@user.organization进入。
标签： ruby-on-rails-4 devise nested-forms