Hey guys, I have a pretty much noob question here.
I''m having problems adding values that come from a database, for
example if
I have several orders in the database, and they have their amounts I can add
them using something like
@outstanding = @bill.find_all_by_status(''1'').sum {|bill|
bill.amount}
and it works properly.
However, there are some instances where I would just like to add certain
values however everytime I want to do something like this
@outstanding += @bill.amount
It doesn''t work properly. It gives me a nil + error.
I''m sure you''ve all gone through this before. If someone could
help me out,
would be great.
--
Saludos,
Juan Roberto Morales
Gerente General
Digital Vision Studios
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You should initialize @outstanding first before trying to add something to it. So for example first set @outstanding to zero and then do @outstanding += @bill.amount Kind regards, Nick -- railshostinginfo.com Compare Rails hosting companies -- Posted via ruby-forum.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 groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Nick:
Thanks for the reply.
The problem I''m getting is that say I initialize it to 0 or 0.0 since
it''s a
float. I''m still getting the same issue.
It''s weird, could you or anyone else show me a working sample of this?
I''ve tried doing this
@outstanding = 0
for item in @items
if item.status == 1
@outstanding += item.amount
end
end
and I get an error.
On 2/24/07, Nick Snels
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:>
>
> You should initialize @outstanding first before trying to add something
> to it. So for example first set @outstanding to zero and then do
> @outstanding += @bill.amount
>
> Kind regards,
>
> Nick
> --
> railshostinginfo.com
> Compare Rails hosting companies
>
> --
> Posted via ruby-forum.com.
>
> >
>
--
Saludos,
Juan Roberto Morales
Gerente General
Digital Vision Studios
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And you''re sure that item.amount has been initialized? I would suggest using the script/console command to test this out... script/console opens up an IRB window that will allow you access to all of your models... you can do a find statement just like you would in your actual site outstanding = 0 Bill.find_by_status_id(1).each do |bill| puts outstanding, bill.amount outstanding += bill.amount end And see what the values are when it errors (see if it thinks that outstanding is nil, or bill.amount) If that works perfectly, then you are somehow un-initializing one of these values elsewhere in your application. On 2/25/07, Juan Roberto Morales <dvstudios-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> > Nick: > > Thanks for the reply. > > The problem I''m getting is that say I initialize it to 0 or 0.0 since it''s > a float. I''m still getting the same issue. > > It''s weird, could you or anyone else show me a working sample of this? > > I''ve tried doing this > > @outstanding = 0 > for item in @items > if item.status == 1 > @outstanding += item.amount > end > end > > > and I get an error. > > > On 2/24/07, Nick Snels <rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote: > > > > > > You should initialize @outstanding first before trying to add something > > to it. So for example first set @outstanding to zero and then do > > @outstanding += @bill.amount > > > > Kind regards, > > > > Nick > > -- > > railshostinginfo.com > > Compare Rails hosting companies > > > > -- > > Posted via ruby-forum.com. > > > > > > Digital Vision Studios > > > > > >--~--~---------~--~----~------------~-------~--~----~ 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 groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---