Hi!
I wonder if somebody could help me.
The
definet_table('sometable',
Field('otherid', compute=lambda r: r['id'])
)
doesn't work for me. :( Sould it work? With other than r['id'] it's working.
Version 2.4.1-alpha.2+timestamp.2013.01.27.10.24.17
2010. május 28., péntek 16:02:23 UTC+2 időpontban mdipierro a következőt
írta:
>
> yes
>
> On May 28, 3:44 am, Mathieu Clabaut <[email protected]> wrote:
> > I guess that one may want some more constraints on the autoincrement
> field.
> > For example, it shall begin at 100 for ecample.
> > It may be because for example, before the application exists some paper
> > records where made which were referenced by number < 100)
> >
> > For such a problem, I've set up with:
> >
> > Field('ref_number', compute=lambda r: r['id'] + 100)
> >
> > Which I hope would eliminate the race solution as it is calculate upon
> > insertion in the database... Is it the case ?
> >
> > -Mathieu
> >
> > On Thu, May 27, 2010 at 23:25, mdipierro <[email protected]>
> wrote:
> > > What is wrong with the default id field that web2py creates for every
> > > table?
> >
> > > On May 27, 3:16 pm, matclab <[email protected]> wrote:
> > > > Hello,
> > > > I'm finding this message in a thread from February...
> >
> > > > I thought that autoincremented field would guaranty unicity in the
> > > > table.
> > > > I'm afraid the provided solution would allow two record to have the
> > > > same autonumber field (think about an access from two users at the
> > > > same time).
> > > > I guess the autoincrement should be done on the DAL or database
> side,
> > > > inside a transaction....
> >
> > > > What do you think about it ?
> >
> > > > On 19 jan, 21:38, Thadeus Burgess <[email protected]> wrote:
> >
> > > > > max_id= db(db.table.autonumber>1).select(db.table.autonumber, #
> > > > > select all records, and only pull the autonumber column
> > > > > orderby=~db.table.autonumber, #
> > > > > descending sort on the autonumber, (highest first)
> > > > > limitby=(0,1) # limit the query
> and
> > > > > only select the first record
> > > > > ).first().autonumber # pull the first
> record
> > > > > from the web2py rows object, and get its autonumber member
> >
> > > > > db.table.autonumber.default = max_id + 1 # Set the table default
> as
> > > > > the last autonumber and incremented by one.
> > > > > db.table.autonumber.writable = False
> >
> > > > > form = crud.create(db.table)
> >
> > > > > -Thadeus
> >
> > > > > On Tue, Jan 19, 2010 at 4:32 AM, ceriox <[email protected]> wrote:
> > > > > > thanks for the reply but i'm not a good web2py programmer ... i
> > > > > > writing my first real app
> > > > > > you can write the code for my request? (i can't understand the
> post
> > > of
> > > > > > your link)
> >
> > > > > > --
> > > > > > You received this message because you are subscribed to the
> Google
> > > Groups "web2py-users" group.
> > > > > > To post to this group, send email to
> > > > > > [email protected]<javascript:>.
>
> > > > > > To unsubscribe from this group, send email to
> > > [email protected] <javascript:><
> web2py%[email protected] <javascript:>>
> > > .
> > > > > > For more options, visit this group athttp://
> > > groups.google.com/group/web2py?hl=en.
--
