Re: [Rails] Find Last Errors

On Mar 11, 2010, at 2:21 PM, Colin Law wrote:
> On 11 March 2010 18:56, Chris Kalaboukis <lists@ruby-forum.com> wrote:
>> Hi guys: This is driving me crazy. Can someone please point me in the
>> right direction:
>>
>> I'm trying to get the last record from my table. Every time I do
>> this,
>> it tells me there is no method, other than id.
>>
>> theconditions = "criteria = '"+t+"'"
>> lastrec = Capture.last(:all, :conditions => theconditions)
>>
>> This table has a number of fields in it
>> id, created_at, tid, text
>>
>> When I call lastrec.id, it works
>> When I call lastrec.created_at it gives me (undefined method
>> `created_at' for nil:NilClass)
>
> I feel sure you must be mistaken somehow. Are you saying that if you
> immediately follow the Capture.last line with
> id = lastrec.id
> created_at = lastrec.created_at
> then the first line passes but you get the nil error on the second? I
> will be surprised if that is the case (I am often surprised mind you).
>
> One thing to try is to run that code in the ruby console.
> Another is to use ruby-debug to break in after the Capture.last line
> and examine the data at that point.
> See the rails guide on debugging if you do not know about ruby-debug
> (http://guides.rubyonrails.org/)
>
> Colin

Hmm, does the id happen to be 4? ;-)

try:
irb> puts nil.id

Last relative to what? If you mean: most recently created, try:

lastrec = Capture.first(:conditions => ['criteria = ?', t], :order =>
'created_at DESC')

-Rob

Rob Biedenharn http://agileconsultingllc.com
Rob@AgileConsultingLLC.com

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