Rails - Jun 2008 - can we add a string to a instance varaiable....

HI ,


 can we add a string to an instance variable like

 @jan+"#{users}"=User.find(:all)

 because i''ve the same query to be executed for both User and Post, for
every month jan..dec.


  so can i write a method which contains

 @jan+"#{name}"=#{Name}.find(:all)      name--> either post or user
that
i pass to the method....

 and how to convert Name i,e; string into object?

  plz reply........
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User.find(:all).group_by(&:month)

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Ryan Bigg wrote:
> User.find(:all).group_by(&:month)
 i need some thing like

 @jan is an instance varaible and can i add a string like name="hi"
 to the instance variable like

  @jan+"#{name}"

 is it possible and even i want to know can we convert a string object 
into object(instance)?


  like we do in java to_String() and to_Object()

   ?
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Why? What are you trying to accomplish?

On Mon, Jun 16, 2008 at 4:30 PM, Vamsi Krishna <
rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:
>
> Ryan Bigg wrote:
> > User.find(:all).group_by(&:month)
>
>  i need some thing like
>
>  @jan is an instance varaible and can i add a string like
name="hi"
>  to the instance variable like
>
>  @jan+"#{name}"
>
>  is it possible and even i want to know can we convert a string object
> into object(instance)?
>
>
>  like we do in java to_String() and to_Object()
>
>   ?
> --
> Posted via http://www.ruby-forum.com/.
>
> >
>

-- 
Appreciated my help?
Recommend me on Working With Rails
http://workingwithrails.com/person/11030-ryan-bigg

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Ryan Bigg wrote:
> Why? What are you trying to accomplish?
> 
> On Mon, Jun 16, 2008 at 4:30 PM, Vamsi Krishna <
> rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:
> 
>>
>> >
>>
> 
> 
> --
> Appreciated my help?
> Recommend me on Working With Rails
> http://workingwithrails.com/person/11030-ryan-bigg
   yeah, to be clear .....

 i''ve 2 methods one for posts and another for users...
 i''d like to get number of users for every month and same for number of
posts for every month..

 for that i had written like

               @januser=User.find(:all,:condition=>["created_at between 
? AND
?","#{changedyear}-01-01","#{changedyear}-01-31"])
 like this for every month as i don''t ''ve a feild name month
in
database....


and the same query can be used by post like
  @janpost=Post.find(:all,:condition=>["created_at between ? AND 
?","#{changedyear}-01-01","#{changedyear}-01-31"])


 and changedyear is a dynamic one...........

 so the query is same for both of them...

 so can i write

 @jan+"#{name}"="#{Name}".find(:all,:condition=>["created_at
between ?
AND ?","#{changedyear}-01-01","#{changedyear}-01-31"])
where name may be
post or user ....
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On Jun 16, 8:31 am, Vamsi Krishna
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
>  so the query is same for both of them...
>
>  so can i write
>
>
 @jan+"#{name}"="#{Name}".find(:all,:condition=>["created_at
between ?
> AND
?","#{changedyear}-01-01","#{changedyear}-01-31"])
where name may be
> post or user ....
Well I thin you''re looking for instance_variable_set and constantize,
but personally I''d put most of that method in the post/user model (and
probably  return  a hash keyed by the month you''re looking at).

Fred
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The finder methods generated by ActiveRecord take a range (I think), so you
can find the start date for January and then the end date and do something
like this:

Post.find_all_by_created_at(beginning_of_january..end_of_january)

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