Rails - Jan 2006 - Different Types of Users and User Engine

My question is how have people implemented different types of users in
their Web applications using user-engine?

As for my application, I use single table inheritance in order to derive
several different types of users, such as "moderators,"
"editors," etc
...

For example, let''s say that I want to create a moderator. I define a
new
moderator class and Controller like so:

class Moderator < User
end

class ModeratorController < UserController
end

My problem with this is that since several functions such as "login,"
"signup" and others directly call the User class. I cannot simply
inherit the ModeratorController from UserController without overriding
everyone of these functions and changing every instance of "User" with
"Moderator"

I think there must be a simple and elegant solution to this.  Any
suggestions?

-- 
Posted via http://www.ruby-forum.com/.

Daniel Holmlund wrote:
> My question is how have people implemented different types of users in
> their Web applications using user-engine?
> 
> As for my application, I use single table inheritance in order to derive
> several different types of users, such as "moderators,"
"editors," etc
> ...
> 
> For example, let''s say that I want to create a moderator. I define
a new
> moderator class and Controller like so:
> 
> class Moderator < User
> end
> 
> class ModeratorController < UserController
> end
> 
> My problem with this is that since several functions such as
"login,"
> "signup" and others directly call the User class. I cannot simply
> inherit the ModeratorController from UserController without overriding
> everyone of these functions and changing every instance of "User"
with
> "Moderator"
> 
> I think there must be a simple and elegant solution to this.  Any
> suggestions?
If you are using the ''user-engine'' then you should just create
roles
using the engine (role/list) for each type of user.  You can then query 
a user''s roles if you need to check them for access.  You can always 
create new columns on the user table if you need to associate more 
information.

Do you really need to subclass them?

_Kevin


-- 
Posted via http://www.ruby-forum.com/.

Well, for example, let''s say that I wanted to extend the user model so 
that each user has a GUID associated with them or include a has and 
belongs to many relationship with projects.

Roles will allow you assign permissions to particular users so that 
actions within the Web application that are allowed or denied, but roles 
don''t let you extend the User model.

I suppose I could write a Mixin in order to modify User, but and hoping 
to avoid that.



Kevin Olbrich wrote:
> Daniel Holmlund wrote:
>> My question is how have people implemented different types of users in
>> their Web applications using user-engine?
>> 
>> As for my application, I use single table inheritance in order to
derive
>> several different types of users, such as "moderators,"
"editors," etc
>> ...
>> 
>> For example, let''s say that I want to create a moderator. I
define a new
>> moderator class and Controller like so:
>> 
>> class Moderator < User
>> end
>> 
>> class ModeratorController < UserController
>> end
>> 
>> My problem with this is that since several functions such as
"login,"
>> "signup" and others directly call the User class. I cannot
simply
>> inherit the ModeratorController from UserController without overriding
>> everyone of these functions and changing every instance of
"User" with
>> "Moderator"
>> 
>> I think there must be a simple and elegant solution to this.  Any
>> suggestions?
> 
> If you are using the ''user-engine'' then you should just
create roles
> using the engine (role/list) for each type of user.  You can then query 
> a user''s roles if you need to check them for access.  You can
always
> create new columns on the user table if you need to associate more 
> information.
> 
> Do you really need to subclass them?
> 
> _Kevin

-- 
Posted via http://www.ruby-forum.com/.

On Jan 11, 2006, at 10:42 AM, Daniel Holmlund wrote:
> My question is how have people implemented different types of users in
> their Web applications using user-engine?
>
> As for my application, I use single table inheritance in order to  
> derive
> several different types of users, such as "moderators,"
"editors," etc
> ...
>
> For example, let''s say that I want to create a moderator. I define
> a new
> moderator class and Controller like so:
>
> class Moderator < User
> end
>
> class ModeratorController < UserController
> end
>
> My problem with this is that since several functions such as
"login,"
> "signup" and others directly call the User class. I cannot simply
> inherit the ModeratorController from UserController without overriding
> everyone of these functions and changing every instance of "User"
with
> "Moderator"
>
> I think there must be a simple and elegant solution to this.  Any
> suggestions?
>
Interesting approach.  I haven''t used the login generator yet, but it  
seems you''ve got a system that works :)

I would add a method to your base class (UserController in this case)  
called "user_class":

protected
   def user_class
     User
   end

Then, in your superclass,

def user_class
   Moderator
end

Now, in every instance where you used to reference "User", change it  
to user_class.  (e.g. User.new --->  user_class.new).  The controller  
will then be using the correct model in both cases.

Duane Johnson
(canadaduane)
http://blog.inquirylabs.com/

I have a problem with installing the Engines plug-in
for rails. 
I get a 
ruby: No such file or directory --
script/plug_in(LoadError)
error when running 
ruby script/plugin install engines

Any ideas what causes this problem? I''m upgraded to
1.0 and everything. 



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I agree with your approach Duane.

Coming from the Java world this is like writing a class getter function.

The only reason I didn''t do this at first was because I was hoping that
I would not have to modify classes that were in the actual user-engine. 
so next time there was a new release of the user engine I could simply 
check out the next version.

I think I will resort to modifying the User class.

Duane Johnson wrote:
> On Jan 11, 2006, at 10:42 AM, Daniel Holmlund wrote:
> 
>> moderator class and Controller like so:
>> everyone of these functions and changing every instance of
"User" with
>> "Moderator"
>>
>> I think there must be a simple and elegant solution to this.  Any
>> suggestions?
>>
> 
> Interesting approach.  I haven''t used the login generator yet, but
it
> seems you''ve got a system that works :)
> 
> I would add a method to your base class (UserController in this case)
> called "user_class":
> 
> protected
>    def user_class
>      User
>    end
> 
> Then, in your superclass,
> 
> def user_class
>    Moderator
> end
> 
> Now, in every instance where you used to reference "User", change
it
> to user_class.  (e.g. User.new --->  user_class.new).  The controller
> will then be using the correct model in both cases.
> 
> Duane Johnson
> (canadaduane)
> http://blog.inquirylabs.com/

-- 
Posted via http://www.ruby-forum.com/.

Daniel Holmlund wrote:
> I agree with your approach Duane.
> 
> Coming from the Java world this is like writing a class getter function.
> 
> The only reason I didn''t do this at first was because I was hoping
that
> I would not have to modify classes that were in the actual user-engine. 
> so next time there was a new release of the user engine I could simply 
> check out the next version.
> 
> I think I will resort to modifying the User class.
> 
You don''t have to.  If you have a user model in your app, the engines 
will overload your model.  All you have to do is create a user model 
with the appropriate function and it should just work.

_Kevin

-- 
Posted via http://www.ruby-forum.com/.

If you want to create different ''types'' of User purely to
control
which actions they have access to, you don''t need to subclass User at
all - you just need to create appropriate Roles and assign them to
specific users. As far as I can see, to solve the problem you describe
this is all that is necessary.

To ''extend'' the User class itself, you just need to create
your own
user.rb in /app/models, and include the modules
LoginEngine::AuthenticatedUser and UserEngine::AuthorizedUser. If you
look into the user engine you''ll see that this is all the user.rb file
has in it. You can then add new functionality to your custom User
class as you please. For example, your /app/models/user.rb file:

class User < ActiveRecord::Base
  include LoginEngine::AuthenticatedUser
  include UserEngine::AuthorizedUser

  has_many :projects

  def magic_method
     puts "this is my custom user model!"
  end

  # and so on...
end

- james

On 1/11/06, Daniel Holmlund <holmlundlists@gmail.com>
wrote:
> Well, for example, let''s say that I wanted to extend the user
model so
> that each user has a GUID associated with them or include a has and
> belongs to many relationship with projects.
>
> Roles will allow you assign permissions to particular users so that
> actions within the Web application that are allowed or denied, but roles
> don''t let you extend the User model.
>
> I suppose I could write a Mixin in order to modify User, but and hoping
> to avoid that.
>
>
>
> Kevin Olbrich wrote:
> > Daniel Holmlund wrote:
> >> My question is how have people implemented different types of
users in
> >> their Web applications using user-engine?
> >>
> >> As for my application, I use single table inheritance in order to
derive
> >> several different types of users, such as "moderators,"
"editors," etc
> >> ...
> >>
> >> For example, let''s say that I want to create a moderator.
I define a new
> >> moderator class and Controller like so:
> >>
> >> class Moderator < User
> >> end
> >>
> >> class ModeratorController < UserController
> >> end
> >>
> >> My problem with this is that since several functions such as
"login,"
> >> "signup" and others directly call the User class. I
cannot simply
> >> inherit the ModeratorController from UserController without
overriding
> >> everyone of these functions and changing every instance of
"User" with
> >> "Moderator"
> >>
> >> I think there must be a simple and elegant solution to this.  Any
> >> suggestions?
> >
> > If you are using the ''user-engine'' then you should
just create roles
> > using the engine (role/list) for each type of user.  You can then
query
> > a user''s roles if you need to check them for access.  You can
always
> > create new columns on the user table if you need to associate more
> > information.
> >
> > Do you really need to subclass them?
> >
> > _Kevin
>
>
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

On 1/11/06, jonathan Mcintire <hatejonny@yahoo.com>
wrote:
> I have a problem with installing the Engines plug-in
> for rails.
> I get a
> ruby: No such file or directory --
> script/plug_in(LoadError)
> error when running
> ruby script/plugin install engines
>
> Any ideas what causes this problem? I''m upgraded to
> 1.0 and everything.
> script/plug_in(LoadError)
I believe you''ve typed the script name incorrectly

It should be

ruby script/plugin

--
Lance Ball
http://lance.langwell-ball.com

Isn''t that what I typed? That looks exactly the same
to me...it''s a really odd error.

--- Lance Ball <lanceball@gmail.com> wrote:
> On 1/11/06, jonathan Mcintire <hatejonny@yahoo.com>
> wrote:
> > I have a problem with installing the Engines
> plug-in
> > for rails.
> > I get a
> > ruby: No such file or directory --
> > script/plug_in(LoadError)
> > error when running
> > ruby script/plugin install engines
> >
> > Any ideas what causes this problem? I''m upgraded
> to
> > 1.0 and everything.
> 
> 
> > script/plug_in(LoadError)
> 
> I believe you''ve typed the script name incorrectly
> 
> It should be
> 
> ruby script/plugin
> 
> --
> Lance Ball
> http://lance.langwell-ball.com
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
> 



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Can you install *any* plugins? It would seem this isn''t really an
engines problem - there''s something wrong with your
''script/plugin''
command...

- james

On 1/11/06, jonathan Mcintire <hatejonny@yahoo.com>
wrote:
> Isn''t that what I typed? That looks exactly the same
> to me...it''s a really odd error.
>
> --- Lance Ball <lanceball@gmail.com> wrote:
>
> > On 1/11/06, jonathan Mcintire <hatejonny@yahoo.com>
> > wrote:
> > > I have a problem with installing the Engines
> > plug-in
> > > for rails.
> > > I get a
> > > ruby: No such file or directory --
> > > script/plug_in(LoadError)
> > > error when running
> > > ruby script/plugin install engines
> > >
> > > Any ideas what causes this problem? I''m upgraded
> > to
> > > 1.0 and everything.
> >
> >
> > > script/plug_in(LoadError)
> >
> > I believe you''ve typed the script name incorrectly
> >
> > It should be
> >
> > ruby script/plugin
> >
> > --
> > Lance Ball
> > http://lance.langwell-ball.com
> > _______________________________________________
> > Rails mailing list
> > Rails@lists.rubyonrails.org
> > http://lists.rubyonrails.org/mailman/listinfo/rails
> >
>
>
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

That''s what I think...I can install gems but I haven''t
installed a plugin yet.

--- James Adam <james.adam@gmail.com> wrote:
> Can you install *any* plugins? It would seem this
> isn''t really an
> engines problem - there''s something wrong with your
> ''script/plugin''
> command...
> 
> - james
> 
> On 1/11/06, jonathan Mcintire <hatejonny@yahoo.com>
> wrote:
> > Isn''t that what I typed? That looks exactly the
> same
> > to me...it''s a really odd error.
> >
> > --- Lance Ball <lanceball@gmail.com> wrote:
> >
> > > On 1/11/06, jonathan Mcintire
> <hatejonny@yahoo.com>
> > > wrote:
> > > > I have a problem with installing the Engines
> > > plug-in
> > > > for rails.
> > > > I get a
> > > > ruby: No such file or directory --
> > > > script/plug_in(LoadError)
> > > > error when running
> > > > ruby script/plugin install engines
> > > >
> > > > Any ideas what causes this problem? I''m
> upgraded
> > > to
> > > > 1.0 and everything.
> > >
> > >
> > > > script/plug_in(LoadError)
> > >
> > > I believe you''ve typed the script name
> incorrectly
> > >
> > > It should be
> > >
> > > ruby script/plugin
> > >
> > > --
> > > Lance Ball
> > > http://lance.langwell-ball.com
> > > _______________________________________________
> > > Rails mailing list
> > > Rails@lists.rubyonrails.org
> > >
> http://lists.rubyonrails.org/mailman/listinfo/rails
> > >
> >
> >
> >
> >
> > __________________________________________________
> > Do You Yahoo!?
> > Tired of spam?  Yahoo! Mail has the best spam
> protection around
> > http://mail.yahoo.com
> > _______________________________________________
> > Rails mailing list
> > Rails@lists.rubyonrails.org
> >
> http://lists.rubyonrails.org/mailman/listinfo/rails
> >
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
> 



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It looks like you are calling script/plug_in (with an underscore) when
you should be calling script/plugin (no underscore)

Lance

On 1/11/06, jonathan Mcintire <hatejonny@yahoo.com>
wrote:
> Isn''t that what I typed? That looks exactly the same
> to me...it''s a really odd error.
>
> --- Lance Ball <lanceball@gmail.com> wrote:
>
> > On 1/11/06, jonathan Mcintire <hatejonny@yahoo.com>
> > wrote:
> > > I have a problem with installing the Engines
> > plug-in
> > > for rails.
> > > I get a
> > > ruby: No such file or directory --
> > > script/plug_in(LoadError)
> > > error when running
> > > ruby script/plugin install engines
> > >
> > > Any ideas what causes this problem? I''m upgraded
> > to
> > > 1.0 and everything.
> >
> >
> > > script/plug_in(LoadError)
> >
> > I believe you''ve typed the script name incorrectly
> >
> > It should be
> >
> > ruby script/plugin
> >
> > --
> > Lance Ball
> > http://lance.langwell-ball.com
> > _______________________________________________
> > Rails mailing list
> > Rails@lists.rubyonrails.org
> > http://lists.rubyonrails.org/mailman/listinfo/rails
> >
>
>
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

--
Lance Ball
http://lance.langwell-ball.com

On Jan 11, 2006, at 4:10 PM, Lance Ball wrote:
> It looks like you are calling script/plug_in (with an underscore) when
> you should be calling script/plugin (no underscore)
>
> Lance
No, he''s calling script/plugin but the error message he''s
getting is
reporting a missing file or directory called script/plug_in (with an  
underscore).
>
> On 1/11/06, jonathan Mcintire <hatejonny@yahoo.com> wrote:
>> Isn''t that what I typed? That looks exactly the same
>> to me...it''s a really odd error.
>>
>> --- Lance Ball <lanceball@gmail.com> wrote:
>>
>>> On 1/11/06, jonathan Mcintire <hatejonny@yahoo.com>
>>> wrote:
>>>> I have a problem with installing the Engines
>>> plug-in
>>>> for rails.
>>>> I get a
>>>> ruby: No such file or directory --
>>>> script/plug_in(LoadError)
>>>> error when running
>>>> ruby script/plugin install engines
>>>>
>>>> Any ideas what causes this problem? I''m upgraded
>>> to
>>>> 1.0 and everything.
>>>
>>>
>>>> script/plug_in(LoadError)
>>>
>>> I believe you''ve typed the script name incorrectly
>>>
>>> It should be
>>>
>>> ruby script/plugin
>>>
>>> --
>>> Lance Ball
>>> http://lance.langwell-ball.com
>>> _______________________________________________
>>> Rails mailing list
>>> Rails@lists.rubyonrails.org
>>> http://lists.rubyonrails.org/mailman/listinfo/rails
>>>
>>
>>
>>
>>
>> __________________________________________________
>> Do You Yahoo!?
>> Tired of spam?  Yahoo! Mail has the best spam protection around
>> http://mail.yahoo.com
>> _______________________________________________
>> Rails mailing list
>> Rails@lists.rubyonrails.org
>> http://lists.rubyonrails.org/mailman/listinfo/rails
>>
>
>
> --
> Lance Ball
> http://lance.langwell-ball.com
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
Duane Johnson
(canadaduane)
http://blog.inquirylabs.com/

thanks for your help, but my problem isn''t that I can''t extend
the User
model to create a moderator or editor, but rather that the 
UserControllor specifically instantiates a "User." if I want to create
a
Moderator and a ModeratorController I must override every function 
within UserController that uses "User" and the only change I make to
the
functions is to replace "User" with "Moderator"

Daniel


James Adam wrote:
> If you want to create different ''types'' of User purely to
control
> which actions they have access to, you don''t need to subclass User
at
> all - you just need to create appropriate Roles and assign them to
> specific users. As far as I can see, to solve the problem you describe
> this is all that is necessary.
> 
> To ''extend'' the User class itself, you just need to
create your own
> user.rb in /app/models, and include the modules
> LoginEngine::AuthenticatedUser and UserEngine::AuthorizedUser. If you
> look into the user engine you''ll see that this is all the user.rb
file
> has in it. You can then add new functionality to your custom User
> class as you please. For example, your /app/models/user.rb file:
> 
> class User < ActiveRecord::Base
>   include LoginEngine::AuthenticatedUser
>   include UserEngine::AuthorizedUser
> 
>   has_many :projects
> 
>   def magic_method
>      puts "this is my custom user model!"
>   end
> 
>   # and so on...
> end
> 
> - james

-- 
Posted via http://www.ruby-forum.com/.

Oh, I must have mistyped when writing about my
error...

The error displays "plugin" , not "plug_in"



--- Duane Johnson <duane.johnson@gmail.com> wrote:
> 
> On Jan 11, 2006, at 4:10 PM, Lance Ball wrote:
> 
> > It looks like you are calling script/plug_in (with
> an underscore) when
> > you should be calling script/plugin (no
> underscore)
> >
> > Lance
> 
> No, he''s calling script/plugin but the error message
> he''s getting is  
> reporting a missing file or directory called
> script/plug_in (with an  
> underscore).
> 
> >
> > On 1/11/06, jonathan Mcintire
> <hatejonny@yahoo.com> wrote:
> >> Isn''t that what I typed? That looks exactly the
> same
> >> to me...it''s a really odd error.
> >>
> >> --- Lance Ball <lanceball@gmail.com> wrote:
> >>
> >>> On 1/11/06, jonathan Mcintire
> <hatejonny@yahoo.com>
> >>> wrote:
> >>>> I have a problem with installing the Engines
> >>> plug-in
> >>>> for rails.
> >>>> I get a
> >>>> ruby: No such file or directory --
> >>>> script/plug_in(LoadError)
> >>>> error when running
> >>>> ruby script/plugin install engines
> >>>>
> >>>> Any ideas what causes this problem? I''m
> upgraded
> >>> to
> >>>> 1.0 and everything.
> >>>
> >>>
> >>>> script/plug_in(LoadError)
> >>>
> >>> I believe you''ve typed the script name
> incorrectly
> >>>
> >>> It should be
> >>>
> >>> ruby script/plugin
> >>>
> >>> --
> >>> Lance Ball
> >>> http://lance.langwell-ball.com
> >>> _______________________________________________
> >>> Rails mailing list
> >>> Rails@lists.rubyonrails.org
> >>>
> http://lists.rubyonrails.org/mailman/listinfo/rails
> >>>
> >>
> >>
> >>
> >>
> >>
> __________________________________________________
> >> Do You Yahoo!?
> >> Tired of spam?  Yahoo! Mail has the best spam
> protection around
> >> http://mail.yahoo.com
> >> _______________________________________________
> >> Rails mailing list
> >> Rails@lists.rubyonrails.org
> >>
> http://lists.rubyonrails.org/mailman/listinfo/rails
> >>
> >
> >
> > --
> > Lance Ball
> > http://lance.langwell-ball.com
> > _______________________________________________
> > Rails mailing list
> > Rails@lists.rubyonrails.org
> >
> http://lists.rubyonrails.org/mailman/listinfo/rails
> 
> Duane Johnson
> (canadaduane)
> http://blog.inquirylabs.com/
> 
> 
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
> 



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Daniel Holmlund wrote:
> thanks for your help, but my problem isn''t that I can''t
extend the User
> model to create a moderator or editor, but rather that the 
> UserControllor specifically instantiates a "User." if I want to
create a
> Moderator and a ModeratorController I must override every function 
> within UserController that uses "User" and the only change I make
to the
> functions is to replace "User" with "Moderator"
> 
> Daniel
> 
Note that the most recent release of the Engines core (1.0.3, I think) 
seems to have a minor bug in it.  This may be causing your trouble.

_Kevin

-- 
Posted via http://www.ruby-forum.com/.

There probably isn''t a particularly clean way of doing what you want -
which is perfectly normal, the login/user engines are quite simple,
and not designed to deal with other user classes.

If you think the login/user engines provide the *closest*
implementation of what you need, I''d suggest you copy it and make all
the modifications that you need locally. You can do this leaving it
running as an engine (probably a good idea if you think you''ll need to
re-use it in more projects), or just re-integrate the
controllers/models/views etc into your own application... and of
course there''s nothing stopping you from releasing what you produce in
it''s own right (with clear documentation of course).

- james

On 1/11/06, Daniel Holmlund <holmlundlists@gmail.com>
wrote:
> thanks for your help, but my problem isn''t that I can''t
extend the User
> model to create a moderator or editor, but rather that the
> UserControllor specifically instantiates a "User." if I want to
create a
> Moderator and a ModeratorController I must override every function
> within UserController that uses "User" and the only change I make
to the
> functions is to replace "User" with "Moderator"
>
> Daniel
>
>
> James Adam wrote:
> > If you want to create different ''types'' of User
purely to control
> > which actions they have access to, you don''t need to subclass
User at
> > all - you just need to create appropriate Roles and assign them to
> > specific users. As far as I can see, to solve the problem you describe
> > this is all that is necessary.
> >
> > To ''extend'' the User class itself, you just need to
create your own
> > user.rb in /app/models, and include the modules
> > LoginEngine::AuthenticatedUser and UserEngine::AuthorizedUser. If you
> > look into the user engine you''ll see that this is all the
user.rb file
> > has in it. You can then add new functionality to your custom User
> > class as you please. For example, your /app/models/user.rb file:
> >
> > class User < ActiveRecord::Base
> >   include LoginEngine::AuthenticatedUser
> >   include UserEngine::AuthorizedUser
> >
> >   has_many :projects
> >
> >   def magic_method
> >      puts "this is my custom user model!"
> >   end
> >
> >   # and so on...
> > end
> >
> > - james
>
>
> --
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