Ah ha!!! Excellent - that looks so much better now! I appreciate your help
-Rob On Tuesday, May 25, 2021 at 4:06:04 PM UTC-4 valq...@gmail.com wrote: > > http://www.web2py.com/books/default/chapter/29/06/the-database-abstraction-layer#Expressions > > вторник, 25 мая 2021 г. в 22:36:47 UTC+3, valq...@gmail.com: > >> db(...).update(some_field = db.some_table.some_field_or_another_field + 1) >> - should work ( it is a single db-query) >> >> >> вторник, 25 мая 2021 г. в 19:59:34 UTC+3, Rob Paire: >> >>> Hi All >>> Thank you for the helpful comments! I am fine leaving the SQL Execute >>> statement in place, but thought the question was worth asking. >>> >>> -Rob >>> >>> On Tuesday, May 25, 2021 at 8:06:46 AM UTC-4 Carlos Correia wrote: >>> >>>> Às 18:20 de 20/05/21, Rob Paire escreveu: >>>> >>>> Hello all, >>>> >>>> I am wondering if it's possible to use DAL update method to increment >>>> the value of table column H_REVNO in one line of code, and one trip to the >>>> database? >>>> >>>> I tried this query, and a couple of similar variations, but could not >>>> get it to work. >>>> db(db.KICKER.id == request.vars.kicker_id).update(H_REVNO=H_REVNO+1) >>>> >>>> Here is what I am using for now >>>> db.executesql("update KICKER set H_REVNO = H_REVNO + 1 where ID = "+ >>>> str(request.vars.kicker_id)) which of course works. >>>> >>>> Thank you all! >>>> >>>> >>>> >>>> Hi, >>>> >>>> Using DAL you have to read the record first in other to get the value >>>> to be incremented. But, if there are many users it might lead to corrupted >>>> values due to concurrency. >>>> >>>> As far as I know, the latest is the only sane approach to solve your >>>> problem. >>>> >>>> >>>> Carlos Correia >>>> ========================= >>>> MEMÓRIA PERSISTENTE >>>> GSM: 917 157 146 (Signal, WhatsApp) >>>> e-mail: ge...@memoriapersistente.pt >>>> URL: http://www.memoriapersistente.pt >>>> XMPP (Jabber): car...@memoriapersistente.pt >>>> GnuPG: wwwkeys.eu.pgp.net >>>> >>>> -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/web2py/bfeb24cc-010f-450e-80a5-be948de33db6n%40googlegroups.com.
