Rails - May 2006 - Problem with case / when conditional of db values

Hello *,

I have been trying to perform conditional actions in the controller 
depending on values in the db - in this case, the object
''info'' and the
column ''status''. I would just like the controller to run an
action
depending on the value in the column, in this case ''OPEN'' or
''SENT'':

1.  def infoupdate
2.   case @info.attribute(:status)
3.    when ''OPEN''
...
       when ''SENT''
...

but keep getting:

''You have a nil object when you didn''t expect it!
The error occured while evaluating nil.attribute''

I believe something is wrong with my code in line 2. and I have been 
trying many alternatives. Please, let me know what I am doing wrong.

Thank you,

Alex





-- 
Posted via http://www.ruby-forum.com/.

Hi Alex,

is the @info instance variable guarenteed to be set before the controller
gets to the infoupdate method?

Perhaps if you set @info in a before_filter to ensure that it is available
at all times.

Alternatively you could make this an instance method of your model

eg
@info.info_update

def info_update
  case self.status
...
...
end

On 5/4/06, Alex S?rensen <as@hippolime.com> wrote:
>
> Hello *,
>
> I have been trying to perform conditional actions in the controller
> depending on values in the db - in this case, the object
''info'' and the
> column ''status''. I would just like the controller to run
an action
> depending on the value in the column, in this case ''OPEN''
or ''SENT'':
>
> 1.  def infoupdate
> 2.   case @info.attribute(:status)
> 3.    when ''OPEN''
> ...
>        when ''SENT''
> ...
>
> but keep getting:
>
> ''You have a nil object when you didn''t expect it!
> The error occured while evaluating nil.attribute''
>
> I believe something is wrong with my code in line 2. and I have been
> trying many alternatives. Please, let me know what I am doing wrong.
>
> Thank you,
>
> Alex
>
>
>
>
>
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
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