Hello, I have a quanity field in my form that should have a length of no more than 3. I tried validate_length_of :qty, :maximum => 3 and this fails Thanks Frank _______________________________________________ Rails mailing list Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org http://lists.rubyonrails.org/mailman/listinfo/rails
Frank,
try this:
validate_format_of :qty, /[1-9][\d]{0,2}/
That should get you a non-zero digit, followed by up to two more digits.
- Jamie
On Thu, 2005-12-08 at 16:22 -0500, Frank wrote:> Hello,
>
> I have a quanity field in my form that should have a length of no more
> than 3.
>
> I tried validate_length_of :qty, :maximum => 3
>
> and this fails
>
> Thanks
> Frank
> _______________________________________________
> Rails mailing list
> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
I get Application error (Rails) Frank ----- Original Message ----- From: "Jamie Macey" <jamie-7g3wz9A/6AxWk0Htik3J/w@public.gmane.org> To: <rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org> Sent: Thursday, December 08, 2005 4:27 PM Subject: Re: [Rails] how do I validate a numeric field?> Frank, > > try this: > > validate_format_of :qty, /[1-9][\d]{0,2}/ > > That should get you a non-zero digit, followed by up to two more digits. > > - Jamie > > On Thu, 2005-12-08 at 16:22 -0500, Frank wrote: >> Hello, >> >> I have a quanity field in my form that should have a length of no more >> than 3. >> >> I tried validate_length_of :qty, :maximum => 3 >> >> and this fails >> >> Thanks >> Frank >> _______________________________________________ >> Rails mailing list >> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org >> http://lists.rubyonrails.org/mailman/listinfo/rails > > _______________________________________________ > Rails mailing list > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org > http://lists.rubyonrails.org/mailman/listinfo/rails >
Frank wrote:> I have a quanity field in my form that should have a length of no more than 3. > > I tried validate_length_of :qty, :maximum => 3 > > and this failsNumbers don''t have a length. Just because a numeric value is 1001 doesn''t mean the variable has a "length" of 4. What you probably want to use is: validates_inclusion_of :qty, :in => 0..999 -Brian
I''m guessing, but is "length" meant for strings and it should be something like validate_with_precision? something like that. bruce On 8-Dec-05, at 2:22 PM, Frank wrote:> Hello, > > I have a quanity field in my form that should have a length of no > more than 3. > > I tried validate_length_of :qty, :maximum => 3 > > and this fails > > Thanks > Frank > _______________________________________________ > Rails mailing list > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org > http://lists.rubyonrails.org/mailman/listinfo/rails_______________________________________________ Rails mailing list Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org http://lists.rubyonrails.org/mailman/listinfo/rails
Sorry, validates_format_of (with an S). I like Brian''s answer better though. On Thu, 2005-12-08 at 16:36 -0500, Frank wrote:> I get Application error (Rails) > > Frank > ----- Original Message ----- > From: "Jamie Macey" <jamie-7g3wz9A/6AxWk0Htik3J/w@public.gmane.org> > To: <rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org> > Sent: Thursday, December 08, 2005 4:27 PM > Subject: Re: [Rails] how do I validate a numeric field? > > > > Frank, > > > > try this: > > > > validate_format_of :qty, /[1-9][\d]{0,2}/ > > > > That should get you a non-zero digit, followed by up to two more digits. > > > > - Jamie > > > > On Thu, 2005-12-08 at 16:22 -0500, Frank wrote: > >> Hello, > >> > >> I have a quanity field in my form that should have a length of no more > >> than 3. > >> > >> I tried validate_length_of :qty, :maximum => 3 > >> > >> and this fails > >> > >> Thanks > >> Frank > >> _______________________________________________ > >> Rails mailing list > >> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org > >> http://lists.rubyonrails.org/mailman/listinfo/rails > > > > _______________________________________________ > > Rails mailing list > > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org > > http://lists.rubyonrails.org/mailman/listinfo/rails > > >
Jamie Macey wrote:> try this: > > validate_format_of :qty, /[1-9][\d]{0,2}/Just so we''re clear, the method is correctly named, "validates_format_of", not "validate_format_of". At least, that''s what my PDF copy of AWDwR says. But I wouldn''t use validates_format_of to check for a number within a certain range of values. That''s what validates_inclusion_of is for... -Brian
Thanks, This worked: validates_inclusion_of :QTY1, :in => 0..999, :message => "must be between 0 and 999" Frank ----- Original Message ----- From: "Brian V. Hughes" <brianvh-ilmOVS5JQ6Xj7r8U7pfrKh2eb7JE58TQ@public.gmane.org> To: <rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org> Sent: Thursday, December 08, 2005 4:37 PM Subject: Re: [Rails] how do I validate a numeric field?> Frank wrote: >> I have a quanity field in my form that should have a length of no more >> than 3. >> >> I tried validate_length_of :qty, :maximum => 3 >> >> and this fails > > Numbers don''t have a length. Just because a numeric value is 1001 doesn''t > mean the variable has a "length" of 4. > > What you probably want to use is: > > validates_inclusion_of :qty, :in => 0..999 > > -Brian > > _______________________________________________ > Rails mailing list > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org > http://lists.rubyonrails.org/mailman/listinfo/rails >
Hi Frank, You could use the *validates_numericality_of(*args) *method. eg validates_numericality_of :qty, :only_integer => true http://api.rubyonrails.com/classes/ActiveRecord/Validations/ClassMethods.html#M000690 Your model class can then include a validate method. This method is called before the model is saved, and you should protect it. ie protected def validate errors.add( :qty, "Should be between 0 and 1000") unless ( :qty.nil? || (:qty >= 0 and :qty < 1000)) end This information came from the Agile web Development with Rails book modified for this situation. It is a great book when your starting with Rails. Cheers Dan On 12/9/05, Jamie Macey <jamie-7g3wz9A/6AxWk0Htik3J/w@public.gmane.org> wrote:> > Sorry, validates_format_of (with an S). I like Brian''s answer better > though. > > On Thu, 2005-12-08 at 16:36 -0500, Frank wrote: > > I get Application error (Rails) > > > > Frank > > ----- Original Message ----- > > From: "Jamie Macey" <jamie-7g3wz9A/6AxWk0Htik3J/w@public.gmane.org> > > To: <rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org> > > Sent: Thursday, December 08, 2005 4:27 PM > > Subject: Re: [Rails] how do I validate a numeric field? > > > > > > > Frank, > > > > > > try this: > > > > > > validate_format_of :qty, /[1-9][\d]{0,2}/ > > > > > > That should get you a non-zero digit, followed by up to two more > digits. > > > > > > - Jamie > > > > > > On Thu, 2005-12-08 at 16:22 -0500, Frank wrote: > > >> Hello, > > >> > > >> I have a quanity field in my form that should have a length of no > more > > >> than 3. > > >> > > >> I tried validate_length_of :qty, :maximum => 3 > > >> > > >> and this fails > > >> > > >> Thanks > > >> Frank > > >> _______________________________________________ > > >> Rails mailing list > > >> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org > > >> http://lists.rubyonrails.org/mailman/listinfo/rails > > > > > > _______________________________________________ > > > Rails mailing list > > > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org > > > http://lists.rubyonrails.org/mailman/listinfo/rails > > > > > > > _______________________________________________ > Rails mailing list > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org > http://lists.rubyonrails.org/mailman/listinfo/rails >_______________________________________________ Rails mailing list Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org http://lists.rubyonrails.org/mailman/listinfo/rails