Rails - Aug 2009 - Check if error_messages_for is set

How do I check if error_messages_for is set?
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On Aug 17, 7:31 pm, Pål Bergström
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
> How do I check if error_messages_for is set?
error_messages_for is a method, I assume what you meant to ask was how
to check whether there are any errors. You can either call valid? or
look at your_ar_object.errors

Fred
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Frederick Cheung wrote:

Hmm. Ok. How do I check if a params part of the model is set? If run:

if params[:kind]

it''s ok. But when I test with

if params[:company][:kind]

it returns "The error occurred while evaluating nil.[]"
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2009/8/17 Pål Bergström
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>:
>
> Hmm. Ok. How do I check if a params part of the model is set? If run:
>
> if params[:kind]
>
> it''s ok. But when I test with
>
> if params[:company][:kind]
>
> it returns "The error occurred while evaluating nil.[]"
Look at the error carefully, if it is finding nil.[] then maybe either
params is nil (unlikely unless you typed it incorrectly) or
params[:company] is nil.  Look in the log file (in your application
log folder) it will show you the parameters posted.

Colin

On Aug 17, 9:04 pm, Pål Bergström
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
> Frederick Cheung wrote:
>
> Hmm. Ok. How do I check if a params part of the model is set? If run:
>
> if params[:kind]
That doesn''t check the model at all, you''re just looking at
the
submitted parameters. Or am I misunderstanding the
question
>
> it''s ok. But when I test with
>
> if params[:company][:kind]
>
> it returns "The error occurred while evaluating nil.[]"
if the parameters may or may not be there you need to check whether
params[:company] exists before you can look at params[:company][:kind]

Fred
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Frederick Cheung wrote:
> On Aug 17, 9:04�pm, P�l Bergstr�m
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
> wrote:
> That doesn''t check the model at all, you''re just looking
at the
> submitted parameters. Or am I misunderstanding the question
It''s a submitted parameters. :-)
> if the parameters may or may not be there you need to check whether
> params[:company] exists before you can look at params[:company][:kind]
Thanks. That might be it.

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Pål Bergström wrote:

What a long way for a simple answer, that I knew before. Why on earth 
check error_messages_for when I have params[my_model] :-)

Thanks for the help.

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