thr3ads.net - Rails - before filter in applicatino

If this information is useful, please help other people find it:
Share via:

Mauro

2011-Feb-24 08:21 UTC

before filter in applicatino_controller.

If I do something like this:

class ApplicationController < ActionController::Base
  protect_from_forgery
  before_filter RubyCAS::Filter
  before_filter :fetch_operator
  include SessionsHelper

  private

  def fetch_operator
    @current_operator ||= session[:cas_user] &&
Operator.find_by_uid(session[:cas_user])
    rescue ActiveRecord::RecordNotFound
      redirect_to("/404.html")
  end

end

The fetch_operator action is always executed, before every action in
every controller?
I''d want to fetch the operator only at start and not before every
action but I need to have it available on every view and controller.

-- 
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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en.

exequiel

2011-Feb-24 13:10 UTC

head link

Re: before filter in applicatino_controller.

Hi,
> The fetch_operator action is always executed, before every action in every
controller?Yes, all kind of filters implemented inside ApplicationController
class are always executed in every controller (whose parent is
ApplicationController) unless you change the behavior explicitly.

class ApplicationController < ActionController::Base
  ...
  before_filter :fetch_operator
...
end

class anotherController < ApplicationController
  before_filter :fetch_operator, :only => [:login]
end

For further information, see:
http://rails.rubyonrails.org/classes/ActionController/Filters/ClassMethods.html

Exequiel.

-- 
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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en.

Michael Pavling

2011-Feb-24 13:37 UTC

head link

Re: before filter in applicatino_controller.

On 24 February 2011 08:21, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> If I do something like this:
>
> [snip controller code]
>
> The fetch_operator action is always executed, before every action in
> every controller?
> I''d want to fetch the operator only at start and not before every
> action but I need to have it available on every view and controller.
Are you then using the @current_operator variable in places in your
controller? (like "if @current_operator.name ==
''fred''..."?)

If so, instead use a helper method to return the operator (and
populate it if necessary), rather than the filter method:


class ApplicationController < ActionController::Base
  protect_from_forgery
  before_filter RubyCAS::Filter
  include SessionsHelper
  helper_method :current_operator

  def current_operator
    @current_operator ||= fetch_operator
  end

  private
  def fetch_operator
    session[:cas_user] &&
Operator.find_by_uid(session[:cas_user])
    rescue ActiveRecord::RecordNotFound
      redirect_to("/404.html")
  end

end

-- 
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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en.

Mauro

2011-Feb-24 15:48 UTC

head link

Re: before filter in applicatino_controller.

On 24 February 2011 13:37, Michael Pavling
<pavling-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> On 24 February 2011 08:21, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>> If I do something like this:
>>
>> [snip controller code]
>>
>> The fetch_operator action is always executed, before every action in
>> every controller?
>> I''d want to fetch the operator only at start and not before
every
>> action but I need to have it available on every view and controller.
>
> Are you then using the @current_operator variable in places in your
> controller? (like "if @current_operator.name ==
''fred''..."?)
>
> If so, instead use a helper method to return the operator (and
> populate it if necessary), rather than the filter method:
>
>
> class ApplicationController < ActionController::Base
>  protect_from_forgery
>  before_filter RubyCAS::Filter
>  include SessionsHelper
>  helper_method :current_operator
>
>  def current_operator
>    @current_operator ||= fetch_operator
>  end
>
>  private
>  def fetch_operator
>    session[:cas_user] &&
> Operator.find_by_uid(session[:cas_user])
>    rescue ActiveRecord::RecordNotFound
>      redirect_to("/404.html")
>  end
>
> end
But if I want fetch the operator only once at application startup?

-- 
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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@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.

exequiel

2011-Feb-24 17:48 UTC

head link

Re: before filter in applicatino_controller.

> But if I want fetch the operator only once at application startup?
I guess you can set up a session variable to make sure to call only
once.

if !session[:operator_called]
  ...
  session[:operator_called] = true
end

-- 
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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en.

Mauro

2011-Feb-24 19:29 UTC

head link

Re: Re: before filter in applicatino_controller.

On 24 February 2011 17:48, exequiel
<efulet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:>> But if I want fetch the operator only once at application startup?
>
> I guess you can set up a session variable to make sure to call only
> once.
>
> if !session[:operator_called]
>  ...
>  session[:operator_called] = true
> end
>In a method of application controller?

-- 
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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@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.

Exequiel Fuentes

2011-Feb-24 19:40 UTC

head link

Re: Re: before filter in applicatino_controller.

On Thu, Feb 24, 2011 at 4:29 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> On 24 February 2011 17:48, exequiel
<efulet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >> But if I want fetch the operator only once at application startup?
> >
> > I guess you can set up a session variable to make sure to call only
> > once.
> >
> > if !session[:operator_called]
> >  ...
> >  session[:operator_called] = true
> > end
> >
> In a method of application controller?

It''s just an example, you can add that piece of code in any method, for
example:

class ApplicationController < ActionController::Base
  ...
  before_filter :call_operator_once
  ...
  def call_operator_once
    if !session[:operator_called]
      fetch_operator()
      !session[:operator_called] = true
    end
  end
end

-- 
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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en.

Mauro

2011-Feb-24 19:44 UTC

head link

Re: Re: before filter in applicatino_controller.

On 24 February 2011 19:40, Exequiel Fuentes
<efulet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:>
> On Thu, Feb 24, 2011 at 4:29 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>>
>> On 24 February 2011 17:48, exequiel
<efulet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>> >> But if I want fetch the operator only once at application
startup?
>> >
>> > I guess you can set up a session variable to make sure to call
only
>> > once.
>> >
>> > if !session[:operator_called]
>> >  ...
>> >  session[:operator_called] = true
>> > end
>> >
>> In a method of application controller?
>
> It''s just an example, you can add that piece of code in any
method, for
> example:
> class ApplicationController < ActionController::Base
>   ...
>   before_filter :call_operator_once
>   ...
>   def call_operator_once
>     if !session[:operator_called]
>       fetch_operator()
>       !session[:operator_called] = true
>     end
>   end
> end
Yes but it executes the call_operator before each action of each
controller in my application.

-- 
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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@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.

exequiel

2011-Feb-24 20:22 UTC

head link

Re: before filter in applicatino_controller.

Typo error, it should be:

def call_operator_once
    if !session[:operator_called]
      fetch_operator()
      session[:operator_called] = true
    end
end

Right, it will called before each action of each controller in your
application, but only one time the fetch_operator method will be
executed. I thought you want to make sure that fetch_operator method
is executed at least one time independent of controller. Now, if you
want to use a filter method and avoid to call it in other controllers
you can use "skip_before_filter :my_method" in each controller. And if
you definitely don''t use this method in other controllers, I guess you
don''t need define a filter method, just call it as usually in each
action that you need it, because any filter that you defined inside
the ActionController class will be inherited by other controllers.

On Feb 24, 4:44 pm, Mauro
<mrsan...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:>
> Yes but it executes the call_operator before each action of each controller
in my application.
-- 
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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@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.

Rails - Feb 2011 - before filter in applicatino_controller.

before filter in applicatino_controller.

Re: before filter in applicatino_controller.

Re: before filter in applicatino_controller.

Re: before filter in applicatino_controller.

Re: before filter in applicatino_controller.

Re: Re: before filter in applicatino_controller.

Re: Re: before filter in applicatino_controller.

Re: Re: before filter in applicatino_controller.

Re: before filter in applicatino_controller.