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amvis

2012-Apr-21 05:21 UTC

issues with changing directory structure in rails3

class BranchesController < ApplicationController
  def branch
    @branch = Branch.new (params[:branch])
    branch_back = @branch.*branch*
  end
end

 in the model have one *branch.rb*
 class Branch
    def branch
    end
 end

In the view have one branches folder, also have the branch.html.erb in that 
folder.
   <%= form_for(@branch) do |f| %>
   <%end%>

*routes.rb*
*
*
match ''branch''     => ''branches#branch''
resources :branches

*i am getting this following error*
*NoMethodError in BranchesController#branch*

*You have a nil object when you didn''t expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.each*

What am I doing wrong?
Thank you

vishnu

*
*

*
*

*
*

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amvis

2012-Apr-21 07:39 UTC

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Re: issues with changing directory structure in rails3

I have changed the code like this
class BranchesController < ApplicationController
  def branch
    @branch = Branch.new  
  end

  def create
    @branch = Branch.new(params[:branch])
  end
end
branch.html.erb in branches folder

<%= form_for(@branch) do |f| %>
 <%end%>


Now the problem is if i want to display some value from branches controller 
to branch.html.erb, i have to define that in branch method 
in BranchesController, but here  all the functionality can be done in 
create method in BranchesController, so that way i didn''t get any
values in
branch.html.erb, How to do that....?. How to  write that in branch 
method?.. if the branch method not in BranchesController, the error will be 
*undefined method model_name nill class*, also if the create method not 
in BranchesController, the error will be *the action create not found*

What am i doing wrong
 thanks..



On Saturday, 21 April 2012 01:21:51 UTC-4, amvis wrote:>
> class BranchesController < ApplicationController
>   def branch
>     @branch = Branch.new (params[:branch])
>     branch_back = @branch.*branch*
>   end
> end
>
>  in the model have one *branch.rb*
>  class Branch
>     def branch
>     end
>  end
>
> In the view have one branches folder, also have the branch.html.erb in 
> that folder.
>    <%= form_for(@branch) do |f| %>
>    <%end%>
>
> *routes.rb*
> *
> *
> match ''branch''     =>
''branches#branch''
> resources :branches
>
> *i am getting this following error*
> *NoMethodError in BranchesController#branch*
>
> *You have a nil object when you didn''t expect it!
> You might have expected an instance of Array.
> The error occurred while evaluating nil.each*
>
> What am I doing wrong?
> Thank you
>
> vishnu
>
> *
> *
>
> *
> *
>
> *
> *
>
>
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Colin Law

2012-Apr-21 07:56 UTC

head link

Re: Re: issues with changing directory structure in rails3

On 21 April 2012 08:39, amvis
<vgrkrishnan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> I have changed the code like this
> class BranchesController < ApplicationController
>   def branch
>     @branch = Branch.new
>   end
>
>   def create
>     @branch = Branch.new(params[:branch])
>   end
> end
> branch.html.erb in branches folder
>
> <%= form_for(@branch) do |f| %>
>  <%end%>
>
>
> Now the problem is if i want to display some value from branches controller
> to branch.html.erb, i have to define that in branch method
> in BranchesController, but here  all the functionality can be done in
create
> method in BranchesController, so that way i didn''t get any values
in
> branch.html.erb, How to do that....?. How to  write that in branch
method?..
> if the branch method not in BranchesController, the error will be undefined
> method model_name nill class, also if the create method not
> in BranchesController, the error will be the action create not found
>
> What am i doing wrong
I don''t have much idea about what problem you are trying to describe,
I presume English is not your first language and understand it can be
difficult to explain a problem clearly.  If I am right then you have
an action branch in the branches controller but have the problem that
in order for data to be seen in the view then you have to setup
variables in that action.  If you don''t want to set them up there then
possibly a before_filter is what you want.

If I am not understanding the problem correctly then please try again
to explain it.  Cut your example down to the absolute minimum code
required and show what you are trying to do and what the problem is.
After writing your description of the problem imagine yourself as
someone who knows nothing about your requirement, read your
description carefully, and make sure the description of the problem is
clear.

Colin
>  thanks..
>
>
>
> On Saturday, 21 April 2012 01:21:51 UTC-4, amvis wrote:
>>
>> class BranchesController < ApplicationController
>>   def branch
>>     @branch = Branch.new (params[:branch])
>>     branch_back = @branch.branch
>>   end
>> end
>>
>>  in the model have one branch.rb
>>  class Branch
>>     def branch
>>     end
>>  end
>>
>> In the view have one branches folder, also have the branch.html.erb in
>> that folder.
>>    <%= form_for(@branch) do |f| %>
>>    <%end%>
>>
>> routes.rb
>>
>> match ''branch''     =>
''branches#branch''
>> resources :branches
>>
>> i am getting this following error
>>
>> NoMethodError in BranchesController#branch
>>
>> You have a nil object when you didn''t expect it!
>> You might have expected an instance of Array.
>> The error occurred while evaluating nil.each
>>
>> What am I doing wrong?
>> Thank you
>>
>> vishnu
>>
>>
>>
>>
> --
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>
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amvis

2012-Apr-21 08:14 UTC

head link

Re: Re: issues with changing directory structure in rails3

On Saturday, 21 April 2012 03:56:02 UTC-4, Colin Law
wrote:>
> On 21 April 2012 08:39, amvis
<vgrkrishnan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > I have changed the code like this 
> > class BranchesController < ApplicationController 
> >   def branch 
> >     @branch = Branch.new 
> >   end 
> > 
> >   def create 
> >     @branch = Branch.new(params[:branch]) 
> >   end 
> > end 
> > branch.html.erb in branches folder 
> > 
> > <%= form_for(@branch) do |f| %> 
> >  <%end%> 
> > 
> > 
> > Now the problem is if i want to display some value from branches 
> controller 
> > to branch.html.erb, i have to define that in branch method 
> > in BranchesController, but here  all the functionality can be done in 
> create 
> > method in BranchesController, so that way i didn''t get any
values in
> > branch.html.erb, How to do that....?. How to  write that in branch 
> method?.. 
> > if the branch method not in BranchesController, the error will be 
> undefined 
> > method model_name nill class, also if the create method not 
> > in BranchesController, the error will be the action create not found 
> > 
> > What am i doing wrong 
>
> I don''t have much idea about what problem you are trying to
describe,
> I presume English is not your first language and understand it can be 
> difficult to explain a problem clearly.  If I am right then you have 
> an action branch in the branches controller but have the problem that 
> in order for data to be seen in the view then you have to setup 
> variables in that action.  If you don''t want to set them up there
then
> possibly a before_filter is what you want. 
>
 
   Thanks colin, 
   what i am trying to do,

*branches_controller*
*
*
class BranchesController < ApplicationController 
   def branch 
     @branch = Branch.new 
   end 
 
   def create 
     @branch = Branch.new(params[:branch]) 
     @name = "vishnu"
   end 
 end 

*branch.html.erb*
<h4> new  <%=@name %> </h4>
 <%= form_for(@branch) do |f| %> 
   <%= f.submit "Save" %>
  <%end%> 

 if i have to get @name in branch.html.erb, i have to define that branch 
action in BranchesController, am i correct...?. So in this application all 
the main function done in create action in BranchesController. In that way 
how to get that values in branch.html.erb

Vishnu
 
> If I am not understanding the problem correctly then please try again 
> to explain it.  Cut your example down to the absolute minimum code 
> required and show what you are trying to do and what the problem is. 
> After writing your description of the problem imagine yourself as 
> someone who knows nothing about your requirement, read your 
> description carefully, and make sure the description of the problem is 
> clear. 
>
> Colin 
>
> >  thanks.. 
> > 
> > 
> > 
> > On Saturday, 21 April 2012 01:21:51 UTC-4, amvis wrote: 
> >> 
> >> class BranchesController < ApplicationController 
> >>   def branch 
> >>     @branch = Branch.new (params[:branch]) 
> >>     branch_back = @branch.branch 
> >>   end 
> >> end 
> >> 
> >>  in the model have one branch.rb 
> >>  class Branch 
> >>     def branch 
> >>     end 
> >>  end 
> >> 
> >> In the view have one branches folder, also have the
branch.html.erb in
> >> that folder. 
> >>    <%= form_for(@branch) do |f| %> 
> >>    <%end%> 
> >> 
> >> routes.rb 
> >> 
> >> match ''branch''     =>
''branches#branch''
> >> resources :branches 
> >> 
> >> i am getting this following error 
> >> 
> >> NoMethodError in BranchesController#branch 
> >> 
> >> You have a nil object when you didn''t expect it! 
> >> You might have expected an instance of Array. 
> >> The error occurred while evaluating nil.each 
> >> 
> >> What am I doing wrong? 
> >> Thank you 
> >> 
> >> vishnu 
> >> 
> >> 
> >> 
> >> 
> > -- 
> > You received this message because you are subscribed to the Google 
> Groups 
> > "Ruby on Rails: Talk" group. 
> > To view this discussion on the web visit 
> > https://groups.google.com/d/msg/rubyonrails-talk/-/765tgLwVuLwJ. 
> > 
> > To post to this group, send email to
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>
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Colin Law

2012-Apr-21 08:19 UTC

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Re: Re: issues with changing directory structure in rails3

On 21 April 2012 09:14, amvis
<vgrkrishnan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> ...
>    what i am trying to do,
>
> branches_controller
>
> class BranchesController < ApplicationController
>    def branch
>      @branch = Branch.new
>    end
>
>    def create
>      @branch = Branch.new(params[:branch])
>      @name = "vishnu"
>    end
>  end
>
> branch.html.erb
> <h4> new  <%=@name %> </h4>
>  <%= form_for(@branch) do |f| %>
>    <%= f.submit "Save" %>
>   <%end%>
>
>  if i have to get @name in branch.html.erb, i have to define that branch
> action in BranchesController, am i correct...?. So in this application all
> the main function done in create action in BranchesController. In that way
> how to get that values in branch.html.erb
Use before_filter to setup @name for both create and branch.

Colin

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amvis

2012-Apr-21 08:35 UTC

head link

Re: Re: issues with changing directory structure in rails3

On Saturday, 21 April 2012 04:19:05 UTC-4, Colin Law
wrote:>
> On 21 April 2012 09:14, amvis
<vgrkrishnan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > ... 
> >    what i am trying to do, 
> > 
> > branches_controller 
> > 
> > class BranchesController < ApplicationController 
> >    def branch 
> >      @branch = Branch.new 
> >    end 
> > 
> >    def create 
> >      @branch = Branch.new(params[:branch]) 
> >      @name = "vishnu" 
> >    end 
> >  end 
> > 
> > branch.html.erb 
> > <h4> new  <%=@name %> </h4> 
> >  <%= form_for(@branch) do |f| %> 
> >    <%= f.submit "Save" %> 
> >   <%end%> 
> > 
> >  if i have to get @name in branch.html.erb, i have to define that
branch
> > action in BranchesController, am i correct...?. So in this application
> all 
> > the main function done in create action in BranchesController. In that
> way 
> > how to get that values in branch.html.erb 
>
>     Thanks   Can i do like that,

    class BranchesController < ApplicationController  
     before_filter :branch,:create
    def branch 
      @branch = Branch.new 
    end 
 
    def create 
      @branch = Branch.new(params[:branch]) 
      @name = "vishnu" 
    end 
  end 
  
Is it correct way...? 

 
> Use before_filter to setup @name for both create and branch. 
>
> Colin 
>
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Colin Law

2012-Apr-21 08:44 UTC

head link

Re: Re: issues with changing directory structure in rails3

On 21 April 2012 09:35, amvis
<vgrkrishnan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:>
>
> On Saturday, 21 April 2012 04:19:05 UTC-4, Colin Law wrote:
>>
>> On 21 April 2012 09:14, amvis
<vgrkrishnan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>> > ...
>> >    what i am trying to do,
>> >
>> > branches_controller
>> >
>> > class BranchesController < ApplicationController
>> >    def branch
>> >      @branch = Branch.new
>> >    end
>> >
>> >    def create
>> >      @branch = Branch.new(params[:branch])
>> >      @name = "vishnu"
>> >    end
>> >  end
>> >
>> > branch.html.erb
>> > <h4> new  <%=@name %> </h4>
>> >  <%= form_for(@branch) do |f| %>
>> >    <%= f.submit "Save" %>
>> >   <%end%>
>> >
>> >  if i have to get @name in branch.html.erb, i have to define that
branch
>> > action in BranchesController, am i correct...?. So in this
application
>> > all
>> > the main function done in create action in BranchesController. In
that
>> > way
>> > how to get that values in branch.html.erb
>>
>     Thanks
>    Can i do like that,
>
>     class BranchesController < ApplicationController
>      before_filter :branch,:create
>
>     def branch
>       @branch = Branch.new
>     end
>
>     def create
>       @branch = Branch.new(params[:branch])
>       @name = "vishnu"
>     end
>   end
>
> Is it correct way...?
No, have a look at the Rails Guide on Action Controller Overview to
see how to use it.  Also google for
rails before_filter
to find many examples and documentation.

Colin
>
>
>>
>> Use before_filter to setup @name for both create and branch.
>>
>> Colin
>
> --
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amvis

2012-Apr-22 10:45 UTC

head link

Re: Re: issues with changing directory structure in rails3

On Saturday, 21 April 2012 04:44:57 UTC-4, Colin Law
wrote:>
> On 21 April 2012 09:35, amvis
<vgrkrishnan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >
> >
> > On Saturday, 21 April 2012 04:19:05 UTC-4, Colin Law wrote:
> >>
> >> On 21 April 2012 09:14, amvis
<vgrkrishnan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >> > ...
> >> >    what i am trying to do,
> >> >
> >> > branches_controller
> >> >
> >> > class BranchesController < ApplicationController
> >> >    def branch
> >> >      @branch = Branch.new
> >> >    end
> >> >
> >> >    def create
> >> >      @branch = Branch.new(params[:branch])
> >> >      @name = "vishnu"
> >> >    end
> >> >  end
> >> >
> >> > branch.html.erb
> >> > <h4> new  <%=@name %> </h4>
> >> >  <%= form_for(@branch) do |f| %>
> >> >    <%= f.submit "Save" %>
> >> >   <%end%>
> >> >
> >> >  if i have to get @name in branch.html.erb, i have to define
that
> branch
> >> > action in BranchesController, am i correct...?. So in this
application
> >> > all
> >> > the main function done in create action in
BranchesController. In that
> >> > way
> >> > how to get that values in branch.html.erb
> >>
> >     Thanks
> >    Can i do like that,
> >
> >     class BranchesController < ApplicationController
> >      before_filter :branch,:create
> >
> >     def branch
> >       @branch = Branch.new
> >     end
> >
> >     def create
> >       @branch = Branch.new(params[:branch])
> >       @name = "vishnu"
> >     end
> >   end
> >
> > Is it correct way...?
>
> No, have a look at the Rails Guide on Action Controller Overview to
> see how to use it.  Also google for
> rails before_filter
> to find many examples and documentation.
>      i have used this 
http://rails-bestpractices.com/posts/57-substituting-before_filter-load_object, 
but i didn''t get that correctly, when i use the access 
specifier(private,protected),i am trying that for 2 days, i have got the 
issues...can u rearrange with the above code, for accessing 
instance variable in all action...

Thank you
vishnu

 
> Colin
>
> >
> >
> >>
> >> Use before_filter to setup @name for both create and branch.
> >>
> >> Colin
> >
> > --
> > You received this message because you are subscribed to the Google
Groups
> > "Ruby on Rails: Talk" group.
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> >
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>
>
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Colin Law

2012-Apr-22 10:49 UTC

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Re: Re: issues with changing directory structure in rails3

On 22 April 2012 11:45, amvis
<vgrkrishnan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:>
>       i have used
>
this http://rails-bestpractices.com/posts/57-substituting-before_filter-load_object,
> but i didn''t get that correctly, when i use the access
> specifier(private,protected),i am trying that for 2 days, i have got the
> issues...can u rearrange with the above code, for accessing
> instance variable in all action...
Show us what you tried and what happened.

Colin

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Colin Law

2012-Apr-22 10:51 UTC

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Re: Re: issues with changing directory structure in rails3

On 22 April 2012 11:49, Colin Law
<clanlaw-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
wrote:> On 22 April 2012 11:45, amvis
<vgrkrishnan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>>
>>       i have used
>>
this http://rails-bestpractices.com/posts/57-substituting-before_filter-load_object,
>> but i didn''t get that correctly, when i use the access
>> specifier(private,protected),i am trying that for 2 days, i have got
the
>> issues...can u rearrange with the above code, for accessing
>> instance variable in all action...
>
> Show us what you tried and what happened.
Just use a simple before_filter initially to get it working.

Colin

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amvis

2012-Apr-22 10:59 UTC

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Re: Re: issues with changing directory structure in rails3

On Sunday, 22 April 2012 06:51:09 UTC-4, Colin Law
wrote:>
> On 22 April 2012 11:49, Colin Law
<clanlaw-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org> wrote:
> > On 22 April 2012 11:45, amvis
<vgrkrishnan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >>
> >>       i have used
> >> this 
>
http://rails-bestpractices.com/posts/57-substituting-before_filter-load_object
> ,
> >> but i didn''t get that correctly, when i use the access
> >> specifier(private,protected),i am trying that for 2 days, i have
got the
> >> issues...can u rearrange with the above code, for accessing
> >> instance variable in all action...
> >
> > Show us what you tried and what happened.
>
> Just use a simple before_filter initially to get it working.
>
>  class BranchesController < ApplicationController  
>      before_filter :create
>
>     def branch 
>       @branch = Branch.new 
>
>         * puts "name...#{@name}"  //i didn''t get the
@name variable *
>     end 
>  
>     def create 
>       @branch = Branch.new(params[:branch]) 
>       @name = "vishnu" 
>     end 
>   end 
>
>   Here the create is my calling function,i mean when i click the button that create function will call, ie *Branches#create.*
*  What am i  wrong...?*
*  Thank you*
*  vishnu*
 
> Colin
>
>
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Colin Law

2012-Apr-22 11:10 UTC

head link

Re: Re: issues with changing directory structure in rails3

On 22 April 2012 11:59, amvis
<vgrkrishnan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:>
>
> On Sunday, 22 April 2012 06:51:09 UTC-4, Colin Law wrote:
>>
>> On 22 April 2012 11:49, Colin Law
<clanlaw-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org> wrote:
>> > On 22 April 2012 11:45, amvis
<vgrkrishnan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>> >>
>> >>       i have used
>> >>
>> >>
this http://rails-bestpractices.com/posts/57-substituting-before_filter-load_object,
>> >> but i didn''t get that correctly, when i use the
access
>> >> specifier(private,protected),i am trying that for 2 days, i
have got
>> >> the
>> >> issues...can u rearrange with the above code, for accessing
>> >> instance variable in all action...
>> >
>> > Show us what you tried and what happened.
>>
>> Just use a simple before_filter initially to get it working.
>>
>>  class BranchesController < ApplicationController
>>      before_filter :create
>>
>>     def branch
>>       @branch = Branch.new
>
>          puts "name...#{@name}"  //i didn''t get the
@name variable
>>
>>     end
>>
>>     def create
>>       @branch = Branch.new(params[:branch])
>>       @name = "vishnu"
>>     end
>>   end
>
>   Here the create is my calling function,i mean when i click the button
that
> create function will call, ie Branches#create.
Don''t try and call one of the actions in the filter.  Add a new method
that is called from the before filter and sets up what you want, so
possibly
before_filter :setup

and

private
  def setup
    @name = "vishnu"
  end

Then setup will be called before each action.
By putting it in the private section of the controller the setup
method is not available as an action itself, but just as a method that
can be called within the controller

Colin

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amvis

2012-Apr-23 03:55 UTC

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Re: Re: issues with changing directory structure in rails3

On Sunday, 22 April 2012 07:10:02 UTC-4, Colin Law
wrote:>
> On 22 April 2012 11:59, amvis
<vgrkrishnan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > 
> > 
> > On Sunday, 22 April 2012 06:51:09 UTC-4, Colin Law wrote: 
> >> 
> >> On 22 April 2012 11:49, Colin Law
<clanlaw-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org> wrote:
> >> > On 22 April 2012 11:45, amvis
<vgrkrishnan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >> >> 
> >> >>       i have used 
> >> >> 
> >> >> this 
>
http://rails-bestpractices.com/posts/57-substituting-before_filter-load_object,
>
> >> >> but i didn''t get that correctly, when i use the
access
> >> >> specifier(private,protected),i am trying that for 2 days,
i have got
> >> >> the 
> >> >> issues...can u rearrange with the above code, for
accessing
> >> >> instance variable in all action... 
> >> > 
> >> > Show us what you tried and what happened. 
> >> 
> >> Just use a simple before_filter initially to get it working. 
> >> 
> >>  class BranchesController < ApplicationController 
> >>      before_filter :create 
> >> 
> >>     def branch 
> >>       @branch = Branch.new 
> > 
> >          puts "name...#{@name}"  //i didn''t get the
@name variable
> >> 
> >>     end 
> >> 
> >>     def create 
> >>       @branch = Branch.new(params[:branch]) 
> >>       @name = "vishnu" 
> >>     end 
> >>   end 
> > 
> >   Here the create is my calling function,i mean when i click the
button
> that 
> > create function will call, ie Branches#create. 
>
> Don''t try and call one of the actions in the filter.  Add a new
method
> that is called from the before filter and sets up what you want, so 
> possibly 
> before_filter :setup 
>
> and 
>
> private 
>   def* setup *
>     @name = "vishnu" 
>   end 
>     
Thanks colin, thank you
when i compare this code with my application code, in the above code, 
before doing all the method, the *setup* method will run, and set the 
variables, so that can be accessed for all methods. But here i have one 
doubt, This is my application structure.....

*-Myapp*

    * -Controller*
           ->pages_controller.rb
     *-View*
           *-pages*
              ->page.html.erb

*class PagesController < ApplicationController*

def *page*
     
end

*end*
My doubt is if i display any variable(example is @name = vishnu) in 
page.html.erb, i have to  create one *page* action in PagesController..? or 
any other way to access....?




 
> Then setup will be called before each action. 
> By putting it in the private section of the controller the setup 
> method is not available as an action itself, but just as a method that 
> can be called within the controller 
>
> Colin 
>
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Colin Law

2012-Apr-23 07:44 UTC

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Re: Re: issues with changing directory structure in rails3

On 23 April 2012 04:55, amvis
<vgrkrishnan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> ...
> Thanks colin, thank you
> when i compare this code with my application code, in the above code,
before
> doing all the method, the setup method will run, and set the variables, so
> that can be accessed for all methods. But here i have one doubt, This is my
> application structure.....
>
> -Myapp
>
>      -Controller
>            ->pages_controller.rb
>      -View
>            -pages
>               ->page.html.erb
>
> class PagesController < ApplicationController
>
> def page
>
> end
>
> end
> My doubt is if i display any variable(example is @name = vishnu) in
> page.html.erb, i have to  create one page action in PagesController..? or
> any other way to access....?
Sorry, no idea what you mean.

Colin

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