问题描述
我试图找到一个解决方案，一个rails设计，这不是所有的明显我。一个朋友谁是非常好的这个东西给了我他的承担，但我想知道是否有一个rails模式 - 我缺少的知识是如何rails创建关系...
I'm trying to find a solution to a rails design that isn't all that obvious to me. A friend who is very good with this stuff has given me his take on it, but I wondered if there is a rails pattern - the knowledge I'm missing is how rails creates the relationship…
我有一个问题空间这样。用户可以在多个组织中执行多个角色。例如，用户在组织1可以是标准用户和高级用户，但在组织2可以是管理员。
I have a problem space like this. Users can perform more than one role at more than one organisation. So for example, a user can be both a "Standard User" and an "Power User" at Organisation 1, but an "Admin" at Organisation 2.
m使用Devise和CanCan。我有一个Users表，Roles and Organizations表和一个roles_users表来管理多对多关系。然后我有一个user_organisations表，它存储用户和组织之间的M2M。这一切工作好。当我这样做;
I'm using Devise and CanCan. I have a Users table, Roles and an Organisations table and a roles_users table to manage that many-to-many relation. Then I have a user_organisations table, which stores the M2M between a user and the organisations. This all works okay. When I do this;
user = User.new({ :email => '[email protected]',
:password => 'password',
:password_confirmation => 'password',
:firstname => 'TestFirstName',
:surname => 'TestSurName'})
org1 = Org.new({:fullname => 'Test Org 1'})
org1.save
org2 = Org.new({:fullname => 'Test Org 2'})
org2.save
user.org << Org.first
user.org << Org.last
user.roles << Role.where('name'=>'administrator').first
user.roles << Role.where('name'=>'PowerUser').first
将期望）两个组织，以及两个用户注册。
I get (as you would expect) two orgs, and a user registered at both.
缺少的是角色。我有一个新模型（使用通过赋值）roles_user_orgs，这意味着user_org表和角色之间的链接，并通过使用user_org的主键和角色id存储用户的角色。但它从来没有人口。我不知道这是否是因为我没有正确地写入插入来填充它，或者因为我的关系不正确 - 或者 - 因为设计是完全错误的，不能在rails中工作。 simper模型是在user_roles表中使用org_id，但我不知道如何填充这个...
The missing bit is the roles. I have a new model (using through assignment), roles_user_orgs, which is meant to be the link between the user_org table and the roles, and store the role for the user by using the primary key of the user_org and the roles id. But it is never populated. I don't know if this is because I am not writing the insert correctly to populate it, or because my relations aren't correct - or - because the design is plain wrong and won't work in rails. The simper model is to use an org_id in the user_roles table, but I don't know how to populate this……
这是我的关联...
class Role
has_many :user_roles, :dependent => :destroy
has_many :users, :through => :user_roles, :uniq => true
has_many :role_user_orgs, :dependent => :destroy
has_many :user_orgs, :through => :role_user_orgs
class Org
has_many :user_orgs
has_many :users, :through => :user_orgs
class UserOrg
belongs_to :org
belongs_to :user
has_many :role_user_orgs, :dependent => :destroy
has_many :roles, :through => :role_user_orgs
class UserRole
belongs_to :User
belongs_to :role
class User
has_many :user_roles
has_many :roles, :through => :user_roles
has_many :user_orgs
has_many :orgs, :through => :user_orgs
class RoleUserOrg
belongs_to :role
belongs_to :user_orgs
推荐答案
我认为你在这里过于复杂。我看到它，你需要一个单一的表 memberships ，应该作为用户，组织和角色之间的连接表
I think you're overcomplicating things here. The way I see it, you need a single table called memberships that should act as a join table between User, Org and Role
class Membership
belongs_to :user
belongs_to :org
belongs_to :role
class User
has_many :memberships
has_many :orgs, through: :memberships
has_many :roles, through: :memberships
要为组织内的用户创建新角色，只需执行以下操作：
To create a new role for a user within an organization, just do:
org = Org.create({:fullname => 'Test Org 1'})
role = Role.where('name'=>'administrator').first
membership = user.memberships.create(org_id: org.id, role_id: role.id)
要查询组织，您可以：
org = Org.where(name: "Test Org").first
my_roles = Role.find(user.memberships.where(org_id: org.id).map(&:role_id))
这篇关于如何在Rails中加入mutli-role，多组织表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！