[web2py] Re: Useful validators IS_LETTERS, IS_DIGITS
Since the two functions are subsets of IS_ALPHANUMERIC(), I'd suggest
that the sub-functions be named:
IS_ALPHA()
and
IS_NUMERIC()
On Aug 28, 2:56 pm, Jonathan Lundell wrote:
> On Aug 28, 2011, at 11:23 AM, Saurabh Sawant wrote:
>
> > They seem fine. Although, having ready to use validators would save
> > some time for those learning the framework. I personally expected
> > those validators to be already there while I was learning.
>
> Trouble is, there's an endless list of pattern expressions that can be
> useful. IS_MATCH is pretty powerful, and should be in your bag of tricks (in
> fact, IS_ALPHANUMERIC just calls IS_MATCH).
>
> At the very least, consider that you might want a language-dependent
> IS_LETTERS, or at least one that accepts the common alphabetic variants.
>
> However, if you do that, do it this way:
>
> IS_MATCH('[0-9]+', strict=True)
> IS_MATCH('[a-zA-Z]+', strict=True)
>
> strict=True forces a $ at the end of the regex. Or you can just include the
> $. (IS_MATCH is already anchored at the beginning of the string.)
>
>
>
>
>
>
>
>
>
> > On Aug 28, 11:05 pm, Massimo Di Pierro
> > wrote:
> >> what's wrong with?
>
> >> IS_MATCH('[0-9]+')
> >> IS_MATCH('[a-zA-Z]+')
>
> >> On Aug 28, 12:59 pm, Saurabh Sawant wrote:
>
> >>> But IS_ALPHANUMERIC by virtue of its name suggests both letters and
> >>> numbers. Having separate validators for each of the cases would make
> >>> the code more readable.
>
> >>> db.auth_user.first_name.requires=IS_LETTERS()
> >>> db.auth_user.age.requires=IS_DIGITS()
Re: [web2py] Re: Useful validators IS_LETTERS, IS_DIGITS
On Aug 28, 2011, at 11:23 AM, Saurabh Sawant wrote:
> They seem fine. Although, having ready to use validators would save
> some time for those learning the framework. I personally expected
> those validators to be already there while I was learning.
Trouble is, there's an endless list of pattern expressions that can be useful.
IS_MATCH is pretty powerful, and should be in your bag of tricks (in fact,
IS_ALPHANUMERIC just calls IS_MATCH).
At the very least, consider that you might want a language-dependent
IS_LETTERS, or at least one that accepts the common alphabetic variants.
However, if you do that, do it this way:
IS_MATCH('[0-9]+', strict=True)
IS_MATCH('[a-zA-Z]+', strict=True)
strict=True forces a $ at the end of the regex. Or you can just include the $.
(IS_MATCH is already anchored at the beginning of the string.)
>
> On Aug 28, 11:05 pm, Massimo Di Pierro
> wrote:
>> what's wrong with?
>>
>> IS_MATCH('[0-9]+')
>> IS_MATCH('[a-zA-Z]+')
>>
>> On Aug 28, 12:59 pm, Saurabh Sawant wrote:
>>
>>
>>
>>
>>
>>
>>
>>> But IS_ALPHANUMERIC by virtue of its name suggests both letters and
>>> numbers. Having separate validators for each of the cases would make
>>> the code more readable.
>>
>>> db.auth_user.first_name.requires=IS_LETTERS()
>>> db.auth_user.age.requires=IS_DIGITS()
>
[web2py] Re: Useful validators IS_LETTERS, IS_DIGITS
Hi Massimo,
They seem fine. Although, having ready to use validators would save
some time for those learning the framework. I personally expected
those validators to be already there while I was learning.
On Aug 28, 11:05 pm, Massimo Di Pierro
wrote:
> what's wrong with?
>
> IS_MATCH('[0-9]+')
> IS_MATCH('[a-zA-Z]+')
>
> On Aug 28, 12:59 pm, Saurabh Sawant wrote:
>
>
>
>
>
>
>
> > But IS_ALPHANUMERIC by virtue of its name suggests both letters and
> > numbers. Having separate validators for each of the cases would make
> > the code more readable.
>
> > db.auth_user.first_name.requires=IS_LETTERS()
> > db.auth_user.age.requires=IS_DIGITS()
>
> > is more readable and less ambiguous than
>
> > db.auth_user.first_name.requires=IS_ALPHANUMERIC(filter='letters')
> > db.auth_user.mobile.requires=IS_ALPHANUMERIC(filter='numbers')
>
> > On Aug 28, 10:13 pm, Bruno Rocha wrote:
>
> > > Or maybe the IS_ALPHANUMERIC can be extended and receive aditional
> > > argument
> > > 'filter' to allow only letters or only numbers
>
> > > IS_ALPHANUMERIC(error_message='', filter='numbers') # to allow only
> > > digits
> > > IS_ALPHANUMERIC(error_message='', filter='letters') # to allow
> > > letters
>
> > > can have some filter to allow special, underscores etc...
>
> > >http://web2py.com/book/default/docstring/IS_ALPHANUMERIC
>
> > > On Sun, Aug 28, 2011 at 1:54 PM, Saurabh Sawant wrote:
> > > > Hi,
>
> > > > I think these validators would be a nice addition to the great set of
> > > > validators we already have. They can be useful for fields for names
> > > > and phone numbers.
>
> > > > class IS_LETTERS(Validator):
> > > > """
> > > > Checks if field's value consists of all letters
>
> > > > example::
>
> > > > INPUT(_type='text', _name='name', requires=IS_LETTERS())
>
> > > > >>> IS_LETTERS()("A")
> > > > ('A', None)
> > > > >>> IS_LETTERS()("")
> > > > ('', None)
> > > > >>> IS_LETTERS()("A_")
> > > > ('A_', 'enter only letters')
> > > > >>> IS_LETTERS()("!")
> > > > ('!', 'enter only letters')
> > > > """
>
> > > > def __init__(self, error_message='enter only letters'):
> > > > IS_MATCH.__init__(self, '^[A-Za-z]*$', error_message)
>
> > > > class IS_DIGITS(Validator):
> > > > """
> > > > Checks if field's value consists of all numeric digits
>
> > > > example::
>
> > > > INPUT(_type='text', _name='name', requires=IS_DIGITS())
>
> > > > >>> IS_NUMBERS()("1")
> > > > ('1', None)
> > > > >>> IS_NUMBERS()("")
> > > > ('', None)
> > > > >>> IS_NUMBERS()("A")
> > > > ('A', 'enter only numbers')
> > > > >>> IS_NUMBERS()("!")
> > > > ('!', 'enter only numbers')
> > > > """
>
> > > > def __init__(self, error_message='enter only digits'):
> > > > IS_MATCH.__init__(self, '^[0-9]*$', error_message)
>
> > > > Regards,
> > > > Saurabh Sawant
>
> > > --
>
> > > --
> > > Bruno Rocha
> > > [ About me:http://zerp.ly/rochacbruno]
> > > [ Aprenda a programar:http://CursoDePython.com.br]
> > > [ O seu aliado nos cuidados com os animais:http://AnimalSystem.com.br]
> > > [ Consultoria em desenvolvimento web:http://www.blouweb.com]
[web2py] Re: Useful validators IS_LETTERS, IS_DIGITS
what's wrong with?
IS_MATCH('[0-9]+')
IS_MATCH('[a-zA-Z]+')
On Aug 28, 12:59 pm, Saurabh Sawant wrote:
> But IS_ALPHANUMERIC by virtue of its name suggests both letters and
> numbers. Having separate validators for each of the cases would make
> the code more readable.
>
> db.auth_user.first_name.requires=IS_LETTERS()
> db.auth_user.age.requires=IS_DIGITS()
>
> is more readable and less ambiguous than
>
> db.auth_user.first_name.requires=IS_ALPHANUMERIC(filter='letters')
> db.auth_user.mobile.requires=IS_ALPHANUMERIC(filter='numbers')
>
> On Aug 28, 10:13 pm, Bruno Rocha wrote:
>
>
>
>
>
>
>
> > Or maybe the IS_ALPHANUMERIC can be extended and receive aditional argument
> > 'filter' to allow only letters or only numbers
>
> > IS_ALPHANUMERIC(error_message='', filter='numbers') # to allow only
> > digits
> > IS_ALPHANUMERIC(error_message='', filter='letters') # to allow letters
>
> > can have some filter to allow special, underscores etc...
>
> >http://web2py.com/book/default/docstring/IS_ALPHANUMERIC
>
> > On Sun, Aug 28, 2011 at 1:54 PM, Saurabh Sawant wrote:
> > > Hi,
>
> > > I think these validators would be a nice addition to the great set of
> > > validators we already have. They can be useful for fields for names
> > > and phone numbers.
>
> > > class IS_LETTERS(Validator):
> > > """
> > > Checks if field's value consists of all letters
>
> > > example::
>
> > > INPUT(_type='text', _name='name', requires=IS_LETTERS())
>
> > > >>> IS_LETTERS()("A")
> > > ('A', None)
> > > >>> IS_LETTERS()("")
> > > ('', None)
> > > >>> IS_LETTERS()("A_")
> > > ('A_', 'enter only letters')
> > > >>> IS_LETTERS()("!")
> > > ('!', 'enter only letters')
> > > """
>
> > > def __init__(self, error_message='enter only letters'):
> > > IS_MATCH.__init__(self, '^[A-Za-z]*$', error_message)
>
> > > class IS_DIGITS(Validator):
> > > """
> > > Checks if field's value consists of all numeric digits
>
> > > example::
>
> > > INPUT(_type='text', _name='name', requires=IS_DIGITS())
>
> > > >>> IS_NUMBERS()("1")
> > > ('1', None)
> > > >>> IS_NUMBERS()("")
> > > ('', None)
> > > >>> IS_NUMBERS()("A")
> > > ('A', 'enter only numbers')
> > > >>> IS_NUMBERS()("!")
> > > ('!', 'enter only numbers')
> > > """
>
> > > def __init__(self, error_message='enter only digits'):
> > > IS_MATCH.__init__(self, '^[0-9]*$', error_message)
>
> > > Regards,
> > > Saurabh Sawant
>
> > --
>
> > --
> > Bruno Rocha
> > [ About me:http://zerp.ly/rochacbruno]
> > [ Aprenda a programar:http://CursoDePython.com.br]
> > [ O seu aliado nos cuidados com os animais:http://AnimalSystem.com.br]
> > [ Consultoria em desenvolvimento web:http://www.blouweb.com]
[web2py] Re: Useful validators IS_LETTERS, IS_DIGITS
But IS_ALPHANUMERIC by virtue of its name suggests both letters and
numbers. Having separate validators for each of the cases would make
the code more readable.
db.auth_user.first_name.requires=IS_LETTERS()
db.auth_user.age.requires=IS_DIGITS()
is more readable and less ambiguous than
db.auth_user.first_name.requires=IS_ALPHANUMERIC(filter='letters')
db.auth_user.mobile.requires=IS_ALPHANUMERIC(filter='numbers')
On Aug 28, 10:13 pm, Bruno Rocha wrote:
> Or maybe the IS_ALPHANUMERIC can be extended and receive aditional argument
> 'filter' to allow only letters or only numbers
>
> IS_ALPHANUMERIC(error_message='', filter='numbers') # to allow only
> digits
> IS_ALPHANUMERIC(error_message='', filter='letters') # to allow letters
>
> can have some filter to allow special, underscores etc...
>
> http://web2py.com/book/default/docstring/IS_ALPHANUMERIC
>
>
>
>
>
>
>
>
>
> On Sun, Aug 28, 2011 at 1:54 PM, Saurabh Sawant wrote:
> > Hi,
>
> > I think these validators would be a nice addition to the great set of
> > validators we already have. They can be useful for fields for names
> > and phone numbers.
>
> > class IS_LETTERS(Validator):
> > """
> > Checks if field's value consists of all letters
>
> > example::
>
> > INPUT(_type='text', _name='name', requires=IS_LETTERS())
>
> > >>> IS_LETTERS()("A")
> > ('A', None)
> > >>> IS_LETTERS()("")
> > ('', None)
> > >>> IS_LETTERS()("A_")
> > ('A_', 'enter only letters')
> > >>> IS_LETTERS()("!")
> > ('!', 'enter only letters')
> > """
>
> > def __init__(self, error_message='enter only letters'):
> > IS_MATCH.__init__(self, '^[A-Za-z]*$', error_message)
>
> > class IS_DIGITS(Validator):
> > """
> > Checks if field's value consists of all numeric digits
>
> > example::
>
> > INPUT(_type='text', _name='name', requires=IS_DIGITS())
>
> > >>> IS_NUMBERS()("1")
> > ('1', None)
> > >>> IS_NUMBERS()("")
> > ('', None)
> > >>> IS_NUMBERS()("A")
> > ('A', 'enter only numbers')
> > >>> IS_NUMBERS()("!")
> > ('!', 'enter only numbers')
> > """
>
> > def __init__(self, error_message='enter only digits'):
> > IS_MATCH.__init__(self, '^[0-9]*$', error_message)
>
> > Regards,
> > Saurabh Sawant
>
> --
>
> --
> Bruno Rocha
> [ About me:http://zerp.ly/rochacbruno]
> [ Aprenda a programar:http://CursoDePython.com.br]
> [ O seu aliado nos cuidados com os animais:http://AnimalSystem.com.br]
> [ Consultoria em desenvolvimento web:http://www.blouweb.com]
