Is there a way to use either Ruby or Rail''s self reflection to return a list of actions a given controller can respond to? I found the "methods" method, but it appears to return everything, including all of the super class methods. I want just the actions a given controller has defined. I am trying to implement a Roles Based Access framework and want to have dynamic links based upon what a user can do. It would be nice if the controllers can tell me what is possible, and then remove those things the user isn''t allowed to do. Any suggestions? --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Greg Donald
2007-Dec-17 19:15 UTC
Re: Use of self reflection to determine possible actions
On Dec 17, 2007 1:11 PM, Crispy <cris_paltenghe-/E1597aS9LQAvxtiuMwx3w@public.gmane.org> wrote:> > Is there a way to use either Ruby or Rail''s self reflection to return > a list of actions a given controller can respond to? > I found the "methods" method, but it appears to return everything, > including all of the super class methods. I want just the actions a > given controller has defined. I am trying to implement a Roles Based > Access framework and want to have dynamic links based upon what a user > can do. It would be nice if the controllers can tell me what is > possible, and then remove those things the user isn''t allowed to do. > > Any suggestions?http://destiney.com/blog/rubyonrails-get-public-actions-from-a-controller -- Greg Donald http://destiney.com/ --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Jean-François Trân
2007-Dec-17 19:29 UTC
Re: Use of self reflection to determine possible actions
Crispy :> Is there a way to use either Ruby or Rail''s self reflection to return > a list of actions a given controller can respond to?ActionController::Base#action_methods and ActionController::Base.action_methods -- Jean-François. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Neither of the two seem to work. I get... Evaluation failed. Reason(s): uninitialized constant ActionWebService::Dispatcher::ActionController::Base On Dec 17, 11:29 am, "Jean-François Trân" <jft...-HujFcYLiWL6M4zKIHC2jIg@public.gmane.org> wrote:> Crispy : > > > Is there a way to use either Ruby or Rail''s self reflection to return > > a list of actions a given controller can respond to? > > ActionController::Base#action_methods and > ActionController::Base.action_methods > > -- Jean-François.--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Everton J. Carpes
2007-Dec-28 04:18 UTC
Re: Use of self reflection to determine possible actions
Sometimes this happen. Where you want to know actions??? On Dec 27, 2007 11:32 PM, Crispy <cris_paltenghe@yahoo.com> wrote:> > Neither of the two seem to work. > I get... > > Evaluation failed. Reason(s): > uninitialized constant > ActionWebService::Dispatcher::ActionController::Base > > On Dec 17, 11:29am, "Jean-François Trân" <jft...@rubyfrance.org> > wrote: > > Crispy : > > > > > Is there a way to use either Ruby or Rail's self reflection to return > > > a list of actions a given controller can respond to? > > > > ActionController::Base#action_methods and > > ActionController::Base.action_methods > > > > -- Jean-François. > > >-- Everton J. Carpes Mobile: +55 53 9129.4593 MSN: maskejc@gmail.com UIN: 343716195 Jabber: everton.carpes@jabber.org "If art interprets our dreams, the computer executes them in the guise of programs!" - Alan J. Perlis --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Everton, I wasn''t sure I understood your question. What I''m trying to do is implement a Role Based Access Control (RBAC) framework. Basically, a user gets assigned one or more Roles. A Role has a collection of Rights. A Right is a Controller and Action within in the applicatoin. If a user has a given right, the authenticator will allow a redirect to that Controller and Action. In the administration section of the application, where Rights are defined and assigned to Roles, I wanted to provide a drop down list of all the possible Rights to select from. Ideally, the application itself should be able to tell me what Controllers and Actions it provides via self reflection. This would have been a snap in Smalltalk, but I can''t seem to get something that works in Ruby/Rails. If one does something like allowedControllers = ApplicationController.subclasses you only get the controller that was in context (presumably because the subclasses method uses ObjectSpace), and its only a string, not the actual class. Therefore, I can''t loop through the collection and do something like allowedActions = aController.action_methods Therefore, i''m a bit frustrated and looking for those wiser than I to clue me in. On Dec 27, 8:18 pm, "Everton J. Carpes" <everton.car...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> Sometimes this happen. > > Where you want to know actions??? > > On Dec 27, 2007 11:32 PM, Crispy <cris_palten...-/E1597aS9LQAvxtiuMwx3w@public.gmane.org> wrote: > > > > > > > > > Neither of the two seem to work. > > I get... > > > Evaluation failed. Reason(s): > > uninitialized constant > > ActionWebService::Dispatcher::ActionController::Base > > > On Dec 17, 11:29am, "Jean-François Trân" <jft...-HujFcYLiWL6M4zKIHC2jIg@public.gmane.org> > > wrote: > > > Crispy : > > > > > Is there a way to use either Ruby or Rail''s self reflection to return > > > > a list of actions a given controller can respond to? > > > > ActionController::Base#action_methods and > > > ActionController::Base.action_methods > > > > -- Jean-François. > > -- > Everton J. Carpes > Mobile: +55 53 9129.4593 > MSN: mask...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org > UIN: 343716195 > Jabber: everton.car...-/eSpBmjxGS4dnm+yROfE0A@public.gmane.org > > "If art interprets our dreams, the computer executes them in the guise of > programs!" - Alan J. Perlis- Hide quoted text - > > - Show quoted text ---~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
The problem with calling ApplicationController.subclasses is that Rails does
not loadclasses until they are invoked - so all you see is the current
controller. To get a list of
all available controllers, you need to explicitly load them all. Example:
(in your controller)
def load_all_controllers
require RAILS_ROOT + "/app/controllers/application"
# Load all the controller files
controller_files = Dir[RAILS_ROOT +
"/app/controllers/**/*_controller.rb"]
controller_files.each do |file_name|
require file_name
end
end
This will pull all of the controller definitions in, giving a complete list
in ApplicationController.subclasses.
To use the list, you need to iterate over the entries:
def iterate_over_controllers
ApplicationController.subclasses.each do |controller_name|
controller_name.constantize.action_methods.each do |method|
# do something with combination of controller_name and method
end
end
end
You may also want to take a look at the User engine (
http://agilewebdevelopment.com/plugins/user_engine ) - even if Engines
aren''t your thing, the ideas there could be useful. Note that the
engine
uses
a rake task to sync available controller/action pairs rather than generating
them on the fly.
Hope this helps..
--Matt
On Dec 28, 2007 12:10 PM, Crispy
<cris_paltenghe-/E1597aS9LQAvxtiuMwx3w@public.gmane.org> wrote:
>
> Everton,
> I wasn''t sure I understood your question.
> What I''m trying to do is implement a Role Based Access Control
(RBAC)
> framework.
> Basically, a user gets assigned one or more Roles. A Role has a
> collection of Rights. A Right is a Controller and Action within in
> the applicatoin.
> If a user has a given right, the authenticator will allow a redirect
> to that Controller and Action.
> In the administration section of the application, where Rights are
> defined and assigned to Roles, I wanted to provide a drop down list of
> all the possible Rights to select from. Ideally, the application
> itself should be able to tell me what Controllers and Actions it
> provides via self reflection.
> This would have been a snap in Smalltalk, but I can''t seem to get
> something that works in Ruby/Rails.
> If one does something like
> allowedControllers = ApplicationController.subclasses
> you only get the controller that was in context (presumably because
> the subclasses method uses ObjectSpace), and its only a string, not
> the actual class.
> Therefore, I can''t loop through the collection and do something
like
> allowedActions = aController.action_methods
> Therefore, i''m a bit frustrated and looking for those wiser than I
to
> clue me in.
>
>
>
> On Dec 27, 8:18pm, "Everton J. Carpes"
<everton.car...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> wrote:
> > Sometimes this happen.
> >
> > Where you want to know actions???
> >
> > On Dec 27, 2007 11:32 PM, Crispy
<cris_palten...-/E1597aS9LQAvxtiuMwx3w@public.gmane.org> wrote:
> >
> >
> >
> >
> >
> >
> >
> > > Neither of the two seem to work.
> > > I get...
> >
> > > Evaluation failed. Reason(s):
> > > uninitialized constant
> > > ActionWebService::Dispatcher::ActionController::Base
> >
> > > On Dec 17, 11:29am, "Jean-François Trân"
<jft...-HujFcYLiWL6M4zKIHC2jIg@public.gmane.org>
> > > wrote:
> > > > Crispy :
> >
> > > > > Is there a way to use either Ruby or Rail''s
self reflection to
> return
> > > > > a list of actions a given controller can respond to?
> >
> > > > ActionController::Base#action_methods and
> > > > ActionController::Base.action_methods
> >
> > > > -- Jean-François.
> >
> > --
> > Everton J. Carpes
> > Mobile: +55 53 9129.4593
> > MSN: mask...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
> > UIN: 343716195
> > Jabber: everton.car...-/eSpBmjxGS4dnm+yROfE0A@public.gmane.org
> >
> > "If art interprets our dreams, the computer executes them in the
guise
> of
> > programs!" - Alan J. Perlis- Hide quoted text -
> >
> > - Show quoted text -
> >
>
--
Matt Jones
mdj.acme-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
President/Technical Director, Acme Art Company (acmeartco.org)
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Everton J. Carpes
2007-Dec-28 21:01 UTC
Re: Use of self reflection to determine possible actions
On previous post i spoke about similar question: http://groups.google.com/group/rubyonrails-talk/browse_thread/thread/f6c1b3a546e7e240/40233a3286dfdccf?hl=en&lnk=gst&q=%22Admin+and+Dry%22#40233a3286dfdccf I have done the same thing that are you speaking about, but controllers/actions was created on a migration. I think that this should be moved to a rake task too. I think that engines like User Engine have problems for me, and so, i create RBAC system myself. On my system, i have more than just controller/action or "permissions" models, i have tools_categories that group actions behind some "tool". Each permission is maded by relationships between tools_categories and roles through functions (where functions is just C-R-U-D at now). The system "introspect" function of each action based on his name (ugly, but works). When you specify a permission you just say that some role have access to create and read, but not update or delete on a specific tool. This is very simple to use and configure and works fine for me. To help me, i just add some useful methods to user model, like canCreate?(action) or canUpdate?(action) and i just overwrite link_to*** helpers to return "" if user has no access to relative access. Note: actions like ''new'' should be classified as C (create), so links for new never will appear if the role has no permissions to create. This give more freedom to write my code, without many IFs on all views... I can give you all this code, but it's in portuguese until now, :( . I will translate all and move to engine in a few days. If you want to help me, i will be grateful. On Dec 28, 2007 5:23 PM, Matt Jones < mdj.acme@gmail.com> wrote:> The problem with calling ApplicationController.subclasses is that Rails > does not loadclasses until they are invoked - so all you see is the > current controller. To get a list of > all available controllers, you need to explicitly load them all. Example: > > (in your controller) > def load_all_controllers > require RAILS_ROOT + "/app/controllers/application" > > # Load all the controller files > controller_files = Dir[RAILS_ROOT + > "/app/controllers/**/*_controller.rb"] > controller_files.each do |file_name| > require file_name > end > end > > This will pull all of the controller definitions in, giving a complete > list in ApplicationController.subclasses. > > To use the list, you need to iterate over the entries: > def iterate_over_controllers > ApplicationController.subclasses.each do |controller_name| > controller_name.constantize.action_methods.each do |method| > # do something with combination of controller_name and method > end > end > end > > You may also want to take a look at the User engine (http://agilewebdevelopment.com/plugins/user_engine) - even if Engines aren't your thing, the ideas there could be useful. Note > that the engine uses > a rake task to sync available controller/action pairs rather than > generating them on the fly. > > Hope this helps.. > > --Matt > > On Dec 28, 2007 12:10 PM, Crispy < cris_paltenghe@yahoo.com> wrote: > > > > > Everton, > > I wasn't sure I understood your question. > > What I'm trying to do is implement a Role Based Access Control (RBAC) > > framework. > > Basically, a user gets assigned one or more Roles. A Role has a > > collection of Rights. A Right is a Controller and Action within in > > the applicatoin. > > If a user has a given right, the authenticator will allow a redirect > > to that Controller and Action. > > In the administration section of the application, where Rights are > > defined and assigned to Roles, I wanted to provide a drop down list of > > all the possible Rights to select from. Ideally, the application > > itself should be able to tell me what Controllers and Actions it > > provides via self reflection. > > This would have been a snap in Smalltalk, but I can't seem to get > > something that works in Ruby/Rails. > > If one does something like > > allowedControllers = ApplicationController.subclasses > > you only get the controller that was in context (presumably because > > the subclasses method uses ObjectSpace), and its only a string, not > > the actual class. > > Therefore, I can't loop through the collection and do something like > > allowedActions = aController.action_methods > > Therefore, i'm a bit frustrated and looking for those wiser than I to > > clue me in. > > > > > > > > On Dec 27, 8:18pm, "Everton J. Carpes" <everton.car...@gmail.com> > > > > wrote: > > > Sometimes this happen. > > > > > > Where you want to know actions??? > > > > > > On Dec 27, 2007 11:32 PM, Crispy <cris_palten...@yahoo.com> wrote: > > > > > > > > > > > > > > > > > > > > > > > > > Neither of the two seem to work. > > > > I get... > > > > > > > Evaluation failed. Reason(s): > > > > uninitialized constant > > > > ActionWebService::Dispatcher::ActionController::Base > > > > > > > On Dec 17, 11:29am, "Jean-François Trân" <jft...@rubyfrance.org> > > > > wrote: > > > > > Crispy : > > > > > > > > > Is there a way to use either Ruby or Rail's self reflection to > > return > > > > > > a list of actions a given controller can respond to? > > > > > > > > ActionController::Base#action_methods and > > > > > ActionController::Base.action_methods > > > > > > > > -- Jean-François. > > > > > > -- > > > Everton J. Carpes > > > Mobile: +55 53 9129.4593 > > > MSN: mask...@gmail.com > > > UIN: 343716195 > > > Jabber: everton.car...@jabber.org > > > > > > "If art interprets our dreams, the computer executes them in the guise > > of > > > programs!" - Alan J. Perlis- Hide quoted text - > > > > > > - Show quoted text - > > acmeartco.org) > > > > > > > >-- Everton J. Carpes Mobile: +55 53 9129.4593 MSN: maskejc@gmail.com UIN: 343716195 Jabber: everton.carpes@jabber.org "If art interprets our dreams, the computer executes them in the guise of programs!" - Alan J. Perlis --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Everton J. Carpes
2007-Dec-28 21:14 UTC
Re: Use of self reflection to determine possible actions
One smallest p.s.: My approach was so non-intrusive, that all application was created before AC, and so i do the AC system and restrict all data under the system on a complex scope restriction, without any change on code that was made before the system. Some practices on this system could be "questionable" (abusive use of with_scope, link_to*** that return blank string obviously generate some invalid or ugly html (tables and lists with blank tds/items, etc)), but the clean code and very fast work done pay this price. On Dec 28, 2007 7:01 PM, Everton J. Carpes <everton.carpes@gmail.com> wrote:> On previous post i spoke about similar question: > > http://groups.google.com/group/rubyonrails-talk/browse_thread/thread/f6c1b3a546e7e240/40233a3286dfdccf?hl=en&lnk=gst&q=%22Admin+and+Dry%22#40233a3286dfdccf > > > I have done the same thing that are you speaking about, but > controllers/actions was created on a migration. I think that this should be > moved to a rake task too. > > I think that engines like User Engine have problems for me, and so, i > create RBAC system myself. On my system, i have more than just > controller/action or "permissions" models, i have tools_categories that > group actions behind some "tool". Each permission is maded by relationships > between tools_categories and roles through functions (where functions is > just C-R-U-D at now). The system "introspect" function of each action based > on his name (ugly, but works). When you specify a permission you just say > that some role have access to create and read, but not update or delete on a > specific tool. This is very simple to use and configure and works fine for > me. > To help me, i just add some useful methods to user model, like > canCreate?(action) or canUpdate?(action) and i just overwrite link_to*** > helpers to return "" if user has no access to relative access. > > Note: actions like ''new'' should be classified as C (create), so links > for new never will appear if the role has no permissions to create. This > give more freedom to write my code, without many IFs on all views... > > I can give you all this code, but it's in portuguese until now, :( . I > will translate all and move to engine in a few days. If you want to help me, > i will be grateful. > > > On Dec 28, 2007 5:23 PM, Matt Jones < mdj.acme@gmail.com> wrote: > > > The problem with calling ApplicationController.subclasses is that Rails > > does not loadclasses until they are invoked - so all you see is the > > current controller. To get a list of > > all available controllers, you need to explicitly load them all. > > Example: > > > > (in your controller) > > def load_all_controllers > > require RAILS_ROOT + "/app/controllers/application" > > > > # Load all the controller files > > controller_files = Dir[RAILS_ROOT + > > "/app/controllers/**/*_controller.rb"] > > controller_files.each do |file_name| > > require file_name > > end > > end > > > > This will pull all of the controller definitions in, giving a complete > > list in ApplicationController.subclasses. > > > > To use the list, you need to iterate over the entries: > > def iterate_over_controllers > > ApplicationController.subclasses.each do |controller_name| > > controller_name.constantize.action_methods.each do |method| > > # do something with combination of controller_name and method > > end > > end > > end > > > > You may also want to take a look at the User engine (http://agilewebdevelopment.com/plugins/user_engine) - even if Engines aren't your thing, the ideas there could be useful. Note > > that the engine uses > > a rake task to sync available controller/action pairs rather than > > generating them on the fly. > > > > Hope this helps.. > > > > --Matt > > > > On Dec 28, 2007 12:10 PM, Crispy < cris_paltenghe@yahoo.com> wrote: > > > > > > > > Everton, > > > I wasn't sure I understood your question. > > > What I'm trying to do is implement a Role Based Access Control (RBAC) > > > framework. > > > Basically, a user gets assigned one or more Roles. A Role has a > > > collection of Rights. A Right is a Controller and Action within in > > > the applicatoin. > > > If a user has a given right, the authenticator will allow a redirect > > > to that Controller and Action. > > > In the administration section of the application, where Rights are > > > defined and assigned to Roles, I wanted to provide a drop down list of > > > all the possible Rights to select from. Ideally, the application > > > itself should be able to tell me what Controllers and Actions it > > > provides via self reflection. > > > This would have been a snap in Smalltalk, but I can't seem to get > > > something that works in Ruby/Rails. > > > If one does something like > > > allowedControllers = ApplicationController.subclasses > > > you only get the controller that was in context (presumably because > > > the subclasses method uses ObjectSpace), and its only a string, not > > > the actual class. > > > Therefore, I can't loop through the collection and do something like > > > allowedActions = aController.action_methods > > > Therefore, i'm a bit frustrated and looking for those wiser than I to > > > clue me in. > > > > > > > > > > > > On Dec 27, 8:18pm, "Everton J. Carpes" <everton.car...@gmail.com> > > > > > > wrote: > > > > Sometimes this happen. > > > > > > > > Where you want to know actions??? > > > > > > > > On Dec 27, 2007 11:32 PM, Crispy <cris_palten...@yahoo.com> wrote: > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Neither of the two seem to work. > > > > > I get... > > > > > > > > > Evaluation failed. Reason(s): > > > > > uninitialized constant > > > > > ActionWebService::Dispatcher::ActionController::Base > > > > > > > > > On Dec 17, 11:29am, "Jean-François Trân" <jft...@rubyfrance.org> > > > > > wrote: > > > > > > Crispy : > > > > > > > > > > > Is there a way to use either Ruby or Rail's self reflection to > > > return > > > > > > > a list of actions a given controller can respond to? > > > > > > > > > > ActionController::Base#action_methods and > > > > > > ActionController::Base.action_methods > > > > > > > > > > -- Jean-François. > > > > > > > > -- > > > > Everton J. Carpes > > > > Mobile: +55 53 9129.4593 > > > > MSN: mask...@gmail.com > > > > UIN: 343716195 > > > > Jabber: everton.car...@jabber.org > > > > > > > > "If art interprets our dreams, the computer executes them in the > > > guise of > > > > programs!" - Alan J. Perlis- Hide quoted text - > > > > > > > > - Show quoted text - > > > acmeartco.org) > > > > > > > > > > > > > > > -- > Everton J. Carpes > Mobile: +55 53 9129.4593 > MSN: maskejc@gmail.com > UIN: 343716195 > Jabber: everton.carpes@jabber.org > > > "If art interprets our dreams, the computer executes them in the guise of > programs!" - Alan J. Perlis >-- Everton J. Carpes Mobile: +55 53 9129.4593 MSN: maskejc@gmail.com UIN: 343716195 Jabber: everton.carpes@jabber.org "If art interprets our dreams, the computer executes them in the guise of programs!" - Alan J. Perlis --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---