ORM: when to raise an exception: on object creation or on use?

From	Victor Porton <porton@narod.ru>
Newsgroups	comp.databases.object, comp.programming
Subject	ORM: when to raise an exception: on object creation or on use?
Followup-To	comp.programming
Date	2015-09-04 17:15 +0300
Organization	Aioe.org NNTP Server
Message-ID	<msc92o$peq$1@speranza.aioe.org> (permalink)

Cross-posted to 2 groups.

Followups directed to: comp.programming

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Should an ORM implementation query the DB as soon as an active record is 
created in order to check that the queried row exists in DB, or is it OK to 
throw an exception later when attempting to access a field (for an 
nonexistent row)?

-- 
Victor Porton - http://portonvictor.org

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ORM: when to raise an exception: on object creation or on use? Victor Porton <porton@narod.ru> - 2015-09-04 17:15 +0300
  Re: ORM: when to raise an exception: on object creation or on use? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2015-09-04 17:51 +0200
    Re: ORM: when to raise an exception: on object creation or on use? Victor Porton <porton@narod.ru> - 2015-09-04 19:22 +0300
      Re: ORM: when to raise an exception: on object creation or on use? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2015-09-04 18:54 +0200
        Re: ORM: when to raise an exception: on object creation or on use? Victor Porton <porton@narod.ru> - 2015-09-04 21:17 +0300
          Re: ORM: when to raise an exception: on object creation or on use? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2015-09-04 20:38 +0200

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