Rails - Apr 2006 - Validating a DateTime

Hi,

Does anyone know of a method to validate a DateTime field?

I''ve looked at the validation docs and the validates_date / 
validates_time plug-in but I can''t find a method to validate a value in
the format of yyyymmddhhmm.  It seems like something that should exist 
already, so I''d just like to check before I attempt my own version...

Cheers,
Mark

Hi, please take a look at the parse method at the following site:

http://www.ruby-doc.org/core/classes/DateTime.html

Peace,

-Conrad

On 4/9/06, Mark Paxton <mark@paxton.plus.com>
wrote:
> Hi,
>
> Does anyone know of a method to validate a DateTime field?
>
> I''ve looked at the validation docs and the validates_date /
> validates_time plug-in but I can''t find a method to validate a
value in
> the format of yyyymmddhhmm.  It seems like something that should exist
> already, so I''d just like to check before I attempt my own
version...
>
> Cheers,
> Mark
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

It should be reasonably straight forward to add a validates_date_time method
to my plugin. Just adapt the validator and regex code for the kind of input
you want.

http://svn.viney.net.nz/things/rails/plugins/validates_date_time

-Jonathan

On 4/10/06, Conrad Taylor <conradwt@gmail.com>
wrote:
>
> Hi, please take a look at the parse method at the following site:
>
> http://www.ruby-doc.org/core/classes/DateTime.html
>
> Peace,
>
> -Conrad
>
> On 4/9/06, Mark Paxton <mark@paxton.plus.com> wrote:
> > Hi,
> >
> > Does anyone know of a method to validate a DateTime field?
> >
> > I''ve looked at the validation docs and the validates_date /
> > validates_time plug-in but I can''t find a method to validate
a value in
> > the format of yyyymmddhhmm.  It seems like something that should exist
> > already, so I''d just like to check before I attempt my own
version...
> >
> > Cheers,
> > Mark
> > _______________________________________________
> > Rails mailing list
> > Rails@lists.rubyonrails.org
> > http://lists.rubyonrails.org/mailman/listinfo/rails
> >
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
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Jonathan Viney wrote:
 > It should be reasonably straight forward to add a validates_date_time
 > method to my plugin. Just adapt the validator and regex code for the
 > kind of input you want.

Conrad Taylor wrote:
> Hi, please take a look at the parse method at the following site:
> 
> http://www.ruby-doc.org/core/classes/DateTime.html
Thanks for the help...

Is there a particular reason that validates_date and validates_time 
doesn''t use the above method for Date and Time?

ie. Date.parse(value_before_type_cast.to_s) Rescue { errors.add.... }

I''ve messed around with the plugin and got it doing something 
approaching what I need, but it''s not very tidy yet.

My other problem is now that I have date and time on the form in 
seperate text boxes which are combined to be saved as one DateTime 
field.  Is there a way to validate the input from a form that isn''t a 
field in the model?

Cheers,
Mark

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On 4/10/06, Mark Paxton <mark@paxton.plus.com>
wrote:
>
>
> Is there a particular reason that validates_date and validates_time
> doesn''t use the above method for Date and Time?
>
> ie. Date.parse(value_before_type_cast.to_s) Rescue { errors.add.... }

Yes. It guesses wrongly too often when the date is a bit ambiguous. And also
doesn''t support some of the input formats I wanted.

I''ve messed around with the plugin and got it doing
something
> approaching what I need, but it''s not very tidy yet.

Email it to me off list if you want. I''ll have a look. I don''t
mind spending
a bit of time adding this sort of functionality to the plugin, I''m sure
others will find it useful and I will probably need it in a month or so
anyway.

My other problem is now that I have date and time on the form
in
> seperate text boxes which are combined to be saved as one DateTime
> field.  Is there a way to validate the input from a form that
isn''t a
> field in the model?

I''m sure we can figure something out. I think if you define {attr} and
{attr}= methods you can use the validators as normal. Untried though.

-Jonathan.
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Jonathan, does the validates_time support the :before and :after format?

ie. validates_time :office_time, :after => "9am",
:before=>"5pm"

I tried it in the code, and there is no compilation error, but it failed my unit
tests

- thanks

Not currently, it will very soon though. I might get time today or tomorrow
to implement it. Feel free to send me a patch if you feel so inclined!

-Jonathan.

On 4/27/06, Anonymous <list@freeonrails.com>
wrote:
>
>
> Jonathan, does the validates_time support the :before and :after format?
>
> ie. validates_time :office_time, :after => "9am",
:before=>"5pm"
>
> I tried it in the code, and there is no compilation error, but it failed
> my unit tests
>
> - thanks
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
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