Rails:多态用户表AuthLogic是一个好主意吗? [英] Rails: Polymorphic User Table a good idea with AuthLogic?

问题描述

我有一个系统，需要从主页上的一种登录表单登录三种用户类型:客户，公司和供应商.

I have a system where I need to login three user types: customers, companies, and vendors from one login form on the home page.

我在 http://github.com/binarylogic中创建了一个根据AuthLogic的示例应用程序工作的用户表. /authlogic_example .我添加了一个名为用户类型"的字段，该字段当前包含客户"，公司"或供应商".

I have created one User table that works according to AuthLogic's example app at http://github.com/binarylogic/authlogic_example. I have added a field called "User Type" that currently contains either 'Customer', 'Company', or 'Vendor'.

注意:每种用户类型都包含许多不同的字段，因此我不确定单表继承是否是最好的方法(如果此结论无效，欢迎进行更正).

Note: each user type contains many disparate fields so I'm not sure if Single Table Inheritance is the best way to go (would welcome corrections if this conclusion is invalid).

这是一种多态关联，其中三种类型中的每一种都用用户记录标记"了吗?我的模型应该如何显示，这样我的用户表和用户类型客户，公司，供应商之间具有正确的关系?

Is this a polymorphic association where each of the three types is 'tagged' with a User record? How should my models look so I have the right relationships between my User table and my user types Customer, Company, Vendor?

非常感谢！

------更新------

------UPDATE------

当前设置:

#User model
class User < ActiveRecord::Base
  acts_as_authentic
  belongs_to :authenticable, :polymorphic => true
end

#Customer model (Company and Vendor models are similar)
class Customer < ActiveRecord::Base
  has_many :users, :as => :authenticable
  acts_as_authentic
end

这是设置它们的有效方法吗?

Is this a valid way to set them up?

推荐答案

这听起来像是您正在尝试做的事情:

This is what it sounds like you are trying to do:

您有users，可以在三个groups之一中.如果那还不太正确，那么进行一些澄清将有所帮助.

You have users that can be in one of three groups. If that isn't quite right a little clarification would help.

由于AuthLogic只关心它的特殊字段，因此在用户模型中制作和使用其他字段并不繁琐.

Since AuthLogic only cares about it's special fields, making and using other fields in your user model is no biggy.

每个user可能都是这样的:

#The Authlogic Fields
t.string :username,          :null => false
t.string :crypted_password,  :null => false
t.string :password_salt,     :null => false
t.string :persistence_token, :null => false

#Your field to identify user type
t.integer :user_type

#If your user is a customer, you would populate these fields
t.integer :customer_name
...

#If your user is a company, you would populate these fields
t.integer :company_name
...

#If your user is a vendor, you would populate these fields
t.integer :vendor_name
...

我不确定单表继承"是什么意思，但是如果您想将有关vendor的信息保留在与用户表分开的表中(除非您真的非常担心性能，否则没有理由)您可以像这样链接您的模型:

I'm not sure what you mean by "single table inheritance" but if you want to keep information about a vendor in a table separate from the users table (really no reason to unless you are REALLY concerned about performance) you can just link up your models like this:

class User < ActiveRecord::Base
  has_many :customers, :companies, :vendors
end

class Customer < ActiveRecord::Base
  belongs_to :user
end

class Company < ActiveRecord::Base
  belongs_to :user
end

class Vendor < ActiveRecord::Base
  belongs_to :user
end

在这种情况下，由于用户与3种用户类型中的2种没有关联，因此您会被迫使用has_many关联，该关联在0关联的情况下效果很好.您只需要在代码中进行一些检查，以确保不会加倍.

In this case, since a user would have no associations to 2 of the 3 user types, you are pushed into using the has_many association which works nicely with the 0 association case. You would just have to do some checks in your code to make sure you don't double up.

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