English 中文(简体)
铁路模式属于一种或另一种模式。
原标题:Rails model belongs to either one model or another

对于客户关系评估,我希望能够将个人模式直接与账户模式或与账户模式相关的公司模式联系起来。 此外,我要将地址模式与公司或个人联系起来。 这是我所铭记的:

class Account
    has_many :Persons
    has_many :Companies
end

class Person
    belongs_to :Account
    belongs_to :Company
    has_one :Address
end

class Company
    belongs_to :Account
    has_many :Persons
    has_one :Address
end

class Address
    belongs_to :Person
    belongs_to :Company
end

因此,账户可以是“个人账户”或“企业账户”,视协会而定。 它们相互排斥。 我计划将外国钥匙账户——id和公司——列入个人表格。 同样,在地址表中,我将有外国钥匙人——id和公司——。 每一种情况下,一个外国钥匙都将无效。

铁路中的这种征兆吗? 如果没有,将非常感谢任何建议。

最佳回答

Take a look at polymorphic associations. I think that s what you are looking for: http://guides.rubyonrails.org/association_basics.html#polymorphic-associations

class Account
     belongs_to :User, :polymorphic => true
end

class Person
     belongs_to :Account, :as => :User
     belongs_to :Company
     has_one :Address, :as => :User
end

class Company
     belongs_to :Account, :as => :User
     belongs_to :Persons
     has_one :Address, :as => :User
end

class Address
     belongs_to :User, :polymorphic => true
end
...

Greetings Sven

问题回答

暂无回答




相关问题
rails collection_select vs. select

collection_select and select Rails helpers: Which one should I use? I can t see a difference in both ways. Both helpers take a collection and generates options tags inside a select tag. Is there a ...

SSL slowness in EC2

We ve deployed our rails app to EC2. In our setup, we have two proxies on small instances behind round-robin DNS. These run nginx load balancers for a dynamically growing and shrinking farm of web ...

Auth-code with A-Za-z0-9 to use in an URL parameter

As part of a web application I need an auth-code to pass as a URL parameter. I am currently using (in Rails) : Digest::SHA1.hexdigest((object_id + rand(255)).to_s) Which provides long strings like : ...

RubyCAS-Client question: Rails

I ve installed RubyCAS-Client version 2.1.0 as a plugin within a rails app. It s working, but I d like to remove the ?ticket= in the url. Is this possible?

activerecord has_many :through find with one sql call

I have a these 3 models: class User < ActiveRecord::Base has_many :permissions, :dependent => :destroy has_many :roles, :through => :permissions end class Permission < ActiveRecord::...

Ordering a hash to xml: Rails

I m building an xml document from a hash. The xml attributes need to be in order. How can this be accomplished? hash.to_xml

Text Editor for Ruby-on-Rails

guys which text editor is good for Rubyonrails? i m using Windows and i was using E-Texteditor but its not free n its expired now can anyone plese tell me any free texteditor? n which one is best an ...

How to get SQL queries for each user where env is production

I’m developing an application dedicated to generate statistical reports, I would like that user after saving their stat report they save sql queries too. To do that I wrote the following module: ...

热门标签