9 Jun
2008
9 Jun
'08
7:48 p.m.
Dear Lukas,
your rewrite of MAChainAccessor provoked some panic here!
Just to let you know that I had written a couple of chaining and
unchaining operaterations, which I use for mapping a flat db query into
a magritte model. It allows me to treat a chain accessor as a kind of
stack as the model is traversed.
These are
#last
#chainTo:
#chainUnlinkLast:
I thought that you might be interested in adopting these (now they are
fixed for the latest) as utilities into MA-Model. If you are interested
then you will find them in the latest Magritte-RDB package in magritte
addons.
best regards
Keith
9 Jun
9 Jun
10:04 p.m.
Hi Keith,
your rewrite of MAChainAccessor provoked some panic
here!
sorry, I didn't expect that anybody was using those.
I think with the refactoring they became more useful, especially since
you don't need to know anymore about the details. You can now just write
aDescription accessor: #foo
and it will automatically create the appropriate accessor object for
you. The same for
aDescription accessor: #(foo bar)
will chain #foo to #bar.
Just to let you know that I had written a couple of
chaining and
unchaining operaterations, which I use for mapping a flat db query
into a magritte model. It allows me to treat a chain accessor as a
kind of stack as the model is traversed.
I don't know if that is useful in general? If you think so, please
feel free to add it to Magritte-Core. I saw that you use it to build a
stack. Wouldn't it be much simpler if you just kept the selectors in
an OrderedCollection and sent #asAccessor if required?
Cheers,
Lukas
--
Lukas Renggli
http://www.lukas-renggli.ch
10 Jun
10 Jun
3:24 a.m.
Lukas Renggli wrote:
Hi Keith,
I have to say that this is a very bumpy migration! I have over 900
existing instances and the new implementation is reversing the instVars.
At present I am attempting to reverse them by hand but it is tricky.
Keith
your rewrite of MAChainAccessor provoked some
panic here!
sorry, I didn't expect that anybody was using those.
I think with the refactoring they became more useful, especially since
you don't need to know anymore about the details. You can now just write
aDescription accessor: #foo
and it will automatically create the appropriate accessor object for
you. The same for
aDescription accessor: #(foo bar)
will chain #foo to #bar.
Just to let you know that I had written a couple
of chaining and
unchaining operaterations, which I use for mapping a flat db query
into a magritte model. It allows me to treat a chain accessor as a
kind of stack as the model is traversed.
I don't know if that is useful in general? If you think so, please
feel free to add it to Magritte-Core. I saw that you use it to build a
stack. Wouldn't it be much simpler if you just kept the selectors in
an OrderedCollection and sent #asAccessor if required?
5810
days inactive
5811
days old
2 comments
2 participants
participants (2)
-
Keith Hodges -
Lukas Renggli