On Wed, Oct 14, 2015 at 12:25 PM, Martin Bjorklund <m...@tail-f.com> wrote:
> Balazs Lengyel <balazs.leng...@ericsson.com> wrote:
> > Hello Martin,
> > I agree that A1 is what follows the spirit of YANG, but then IMHO you
> > should change/correct 8.2.1 in YANG because that implies A2 and error.
>
> Ok, I agree. I suggest we remove from 8.2.1:
>
> o If data for a node tagged with "when" is present, and the "when"
> condition evaluates to "false", the server MUST reply with an
> "unknown-element" error-tag in the rpc-error.
>
> and add to 8.2.2:
>
> o Modification requests for nodes tagged with "when", and the "when"
> condition evaluates to "false". In this case the server MUST reply
> with an "unknown-element" error-tag in the rpc-error.
>
>
>
This seems like a BIG protocol change to <edit-config> behavior.
IMO this not an error at all. In our server the false-when data is just
pruned, and no error is ever sent for a pruned when=false data node.
It may be a client programming error for the client to provide
false when nodes or not. What if the client is reusing some
code that sends 5 parameters, it it's OK if 1 of them gets
pruned sometimes because of a false when (e.g, product
feature-specific knob and that feature is not installed)
BTW, this is a really good example of what not to do, if one
wants to make the YANG specification protocol independent.
> /martin
>
>
Andy
>
> > regards Balazs
> >
> > On 2015-10-13 13:30, Martin Bjorklund wrote:
> > > Balazs Lengyel <balazs.leng...@ericsson.com> wrote:
> > >> Hello Martin,
> > >> If I had a model
> > >>
> > >> leaf a {type boolean;}
> > >> leaf b {
> > >> when a
> > >> type int8;
> > >> }
> > >>
> > >> if "a" is false and then you get an edit config with: set b=5 ; set
> > >> a=true
> > >> What should be the result?
> > >> A1) this should succeed as at commit time the "when" will be true.
> > > yes.
> > >
> > >> A2) this should fail as at parsing (as described in 8.2.1 of the YANG
> > >> RFC) the when is false - yet. This would also mean that you need 2
> > >> edit-configs to set b=5.
> > >> regards Balazs
> > >
> > > /martin
> >
> > --
> > Balazs Lengyel Ericsson Hungary Ltd.
> > Senior Specialist
> > ECN: 831 7320
> > Mobile: +36-70-330-7909 email: balazs.leng...@ericsson.com
> >
>
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