Some other issue:
db:
import datetime
db.define_table('sometable',
Field('otherid',
compute=lambda r: 'SPPRIME%s' % (
datetime.date.today().strftime('%y%m%d'
))
)
If I insert a db row from modules
current.db.sometable.insert()
The new record has otherid==None :(
2013. január 29., kedd 9:17:38 UTC+1 időpontban szimszon a következőt írta:
>
> The really ugly thing is that compute can silently fail and you could end
> up with None in the db table cell :(
>
> 2013. január 29., kedd 9:13:29 UTC+1 időpontban szimszon a következőt írta:
>>
>> Something about this issue? Should it work?
>>
>> 2013. január 28., hétfő 15:44:22 UTC+1 időpontban szimszon a következőt
>> írta:
>>>
>>> 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
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>>>> > > > > > To post to this group, send email to [email protected].
>>>>
>>>> > > > > > To unsubscribe from this group, send email to
>>>> > > [email protected]<web2py%[email protected]>
>>>>
>>>> > > .
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>>>> > > groups.google.com/group/web2py?hl=en.
>>>
>>>
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