An interesting question I've not been able to solve reading docs or
Googling. As every posting here only after some serious research efforts
including class inspections ;-). But am stumped and wonder if anyone
else has any ideas.
Here is the use case:
1. Load an object from database
2. Flag it as unsaveable, not to be written back to database under any
circumstances
3. Make changes to the object (its fields)
4. Present a detail view of the object.
Basically, would like the freedom to change an object knowing the
database is secure.
As ever, am more interested in how to do this, than questioning why to
do it. It may not be possible in which case fear not, I'm on top of the
why's and can look at alternative strategies. But this use case provides
an easy way of injecting some filters in one place of a code body I have
without changing any of the views or other code. Simply one small hook I
place into extant code, which will play around with the object (making
translations for example). But in order to do so would want to know this
cannot be written back to the database, that from here on in, it's for
display purposes only.
Have a suspicion after some research that this can't be done. In which
case there's a second and almost as useful use case:
1. Load an object from database
2. Make a copy, that is unsaveable, not to be written back to database
under any circumstances
3. Make changes to the copy (its fields)
4. Present a detail view of the copy.
This has some slightly better chance of being possible. If not as well,
yes indeed, I have to dive into the view itself and put hooks into each
field as it renders I guess. Which is life. But would seem useful to do
it with one of these use cases (again no need to discuss the merits of
one approach over the other at all, am more interested in possibility -
projects have huge amounts of context not readily shareable that
influence the relative merits of one approach over another of course.
Regards,
Bernd.
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