使用join model
时,是否可以在accepts_nested_attributes_for
上设置其他属性?
我有用户,帐户和角色模型。 Account模型接受用户的嵌套属性。这样,用户可以同时创建他们的帐户和用户记录。
class AccountsController < ApplicationController
def new
@account = Account.new
@user = @account.users.build
end
end
上述方法有效,但user.roles.type
默认为member
。在注册时,我需要user.roles.type
默认为admin
。这不起作用:
class AccountsController < ApplicationController
def new
@account = Account.new
@role = @account.role.build
# Role.type is protected; assign manually
@role.type = "admin"
@user = @account.users.build
end
end
<%= simple_form_for(@account, html: { class: 'form-horizontal' }) do |f| %>
<legend>Account Details</legend>
<%= render 'account_fields', f: f %>
<%= f.simple_fields_for :users do |user_form| %>
<legend>Personal Details</legend>
<%= render 'users/user_fields', f: user_form %>
<% end %>
<%= f.submit t('views.accounts.post.create'), class: 'btn btn-large btn-primary' %>
<% end %>
class User < ActiveRecord::Base
has_many :roles
has_many :accounts, through: :roles
end
class Account < ActiveRecord::Base
has_many :roles
has_many :users, through: :roles
accepts_nested_attributes_for :users
end
# user_id, account_id, type [admin|moderator|member]
class Role < ActiveRecord::Base
belongs_to :user
belongs_to :account
after_initialize :init
ROLES = %w[owner admin moderator member]
private
def init
self.type = "member" if self.new_record?
end
end
继承可以解决这个问题,但我发现它使事情变得复杂。我需要角色是动态的,因此用户可以添加自己的管理员和mod,等等。我想我遇到了这些问题,因为我没有正确建模我的数据建模。
答案 0 :(得分:0)
您可以更改模型以将类型初始化为“admin”而不是“member”。
private
def init
self.type = "admin" if self.new_record?
end