Can we add a string to a instance varaiable

Rails
1

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…

2

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

3

Ryan B. 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()

?

4

Why? What are you trying to accomplish?

On Mon, Jun 16, 2008 at 4:30 PM, Vamsi K. <
[email protected]> wrote:

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

5

On Jun 16, 8:31 am, Vamsi K. [email protected]
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

6

Ryan B. wrote:

Why? What are you trying to accomplish?

On Mon, Jun 16, 2008 at 4:30 PM, Vamsi K. <
[email protected]> 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 …

7

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)