[Catalyst] Keep getting checksum mismatch problems each time I regenerate my schema files

[kakimoto at tpg.com.au]

Hi there
 I think I know why.
 Because I use the TimeStamp component, I guess I should have executed
the command as per the tute
(http://search.cpan.org/~hkclark/Catalyst-Manual-5.7020/lib/Catalyst/Manual/Tutorial/MoreCatalystBasics.pod)
with the 'components=TimeStamp'.

command: script/myapp_create.pl model DB DBIC::Schema MyApp::Schema
create=static components=TimeStamp dbi:SQLite:myapp.db





Quoting Tomas Doran <bobtfish at bobtfish.net>:

> This discussion should be on the DBIC list really, as it doesn't have
>  
> much to do with Catalyst.
> 
> On 17 Apr 2009, at 03:27, kakimoto at tpg.com.au wrote:
> > Quoting John Romkey <romkey at apocalypse.org>:
> >> Look in the schema file. You see this line?
> >>
> >> # DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum: XXXXXXXX
> >>
> >> it means that you modified that line or something above it...
> >
> > Yes I do see the line.
> >
> > If the way the check is to be done is so stringent (ie. permissions
> on
> > the files it touches or even new lines, surely, the makers of this
> > package could come up with somethign better. I don't have the same 
> 
> > issue
> > when using Ruby on Rails' Active Records).
> >
> 
> 
> What? There is nothing done with permissions, I have no idea what  
> you're talking about with that.
> 
> And I can't think of a better way to ensure that someone hasn't  
> altered the generated code than what is done. Conceptually you  
> _could_ in some way get the optree of the code, rather than the text,
>  
> and then checksum that (so that you could add new lines and spaces  
> and comments to the generated code), but this is _extremely non- 
> trivial_ to implement, and also still wouldn't provide a way to leave
>  
> your modifications in place when the code was re-generated, so I  
> don't see any benefit to investigating it.
> 
> Saying ActiveRecord doesn't do this isn't really helpful - you're not
>  
> comparing like with like here.. ActiveRecord does around the same as 
> 
> 'create=dynamic' for schema mode, so there really _is no generated  
> code_, as its introspected each time.
> 
> You _can_ do your schema like this if you want to, but that opens a 
> 
> whole load of different issues I won't go into here (which  
> ActiveRecord also suffers from).
> 
> Cheers
> t0m
> 
> 
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