Re: validate user input on templates

hey

use:
str.isdigit()
http://www.tutorialspoint.com/python/string_isdigit.htm

what is idDigit() ? is that a call to a method somewhere else.
and arent you trying to validate numberofapples = request.POST['numberofapples']
not playerid?

Personally if this is form data you are trying to validate i'd write a
form class and use the form clean() method to evaluate them as
integerfields:

http://docs.djangoproject.com/en/1.2/ref/forms/fields/
http://docs.djangoproject.com/en/1.2/topics/forms/

Also you can verify using regular expressions *good to get comfortable
with if you're new to django.

cheers

sam_w

On Mon, Mar 28, 2011 at 4:59 PM, django beginner <djangopyth@gmail.com> wrote:
> Hi django experts,
>
> just want to know your opinion on how to validate the user input
> (example: the user input field should be integer, but the user
> accidentally inputs any character), here is my code:
>
> FYI; the numberofapples field is IntegerField
>
> here is my sample code:
>
> def apples_edit(request):
>    if request.POST['id']:
>         id = request.POST['id']
>         numberofapples = request.POST['numberofapples']
>         conn = psycopg2.connect("dbname=my_db user=user password=pass
> host=localhost")
>         cur = conn.cursor()
>
>        try:
>           if isDigit(playerid):
>                pass
>           else:
>                template_name = 'err_template.html'
>                t = loader.get_template(template_name)
>                c = RequestContext(request, {"err_msg":"number of
> apples should be integer, Please correct your input"})
>                return HttpResponse(t.render(c))
>        except ValueError:
>            template_name = 'err_template.html'
>            t = loader.get_template(template_name)
>            c = RequestContext(request, {"err_msg":"number of apples
> should be integer, Please correct your input"})
>            return HttpResponse(t.render(c))
>
>         sql = """ UPDATE my_db SET "numberofapples"='%s' where "id"='%s'
> """ % (numberofapples,id)
>         cur.execute(sql)
>         conn.commit()
>         conn.close()
>
> ----------------------
> My problem is that, the error template does not appear after I type in
> any character for numberofapples field.
> What would be the correct code for this?
>
> Thanks.
>
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