[Nitro] Automatic object evolution

Zachary Zolton zachary.zolton at gmail.com
Thu Oct 27 08:17:13 EDT 2005


In setting :evolve_schema, couldn't we use use the value true instead
of the string 'true'?


On 10/27/05, TRANS <transfire at gmail.com> wrote:
> On 10/27/05, Rob Pitt <rob at motionpath.com> wrote:
> > Ahh conflicting information!
> >
> > George wants interactive, me and Chris want it settable with options
> > when doing Og.setup and you want methods :)
>
> I'm not so sure we "want", I think it's more just suggsting possible solution.
>
> > Here is how I see this then,
> >
> > Interactive is the default behaviour.
> > You can set options like:
>
> Ah this helps.
>
> >   Og.setup(
> >         :store => 'psql',
> >         :address => 'host',
> >         :name => 'database',
> >         :user => dbclient',
> >         :password => 'naughty',
> >         :evolve_schema => 'true' <------------- this would cause both
> > create and delete to happen non-interactively but would log info in
> > debug mode
>
> Okay, but the default if not given is false.
>
> >         :evolve_schema_constructive => 'true' <---------- this would
> > cause creates to happen silently but prompt for delete
>
> I'm not so sure about prompting. Prompting is generally not a good
> idea --that's why we have settings like this one. How about:
>
>         :evolve_schema_cautious => 'true' <---------- this would
> > cause creates to happen but not deletes.
>
> only applies if evolve_schema is set and it should default to true.
>
> >         :evolve_schema_destructive => 'true' <---------- this would
> > cause deletes to happen silently but prompt for creates
>
> This last one I think is useless.
>
> The reason I take this approach  is because it is too easy to
> inadvertantly cause a field delete, and if your working in live-data
> conditions by chance....well, I hope you remembered to back-up!
>
> T.
>
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