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Another GOODS issue: BlockContext's

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Ken Causey-3

Another GOODS issue: BlockContext's

I seem to remember this coming up in the past but a quick Google search
doesn't turn anything up. It appears that GOODS is quite happy to store
a BlockContext but it entirely unable to reinstantiate it. It attempts
to use BlockContext (ContextPart) class>>basicNew: which throws a
'Contexts must only be created with newForMethod:' error. Quite a PITA
when you want to store something in a SortedCollection. Oh well, I
guess I can call OrderedCollection>>sortBy: every time I add a new item
since adding is a comparatively rare action.

Ken

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Benjamin Pollack

Re: Another GOODS issue: BlockContext's

On 6/1/06, Ken Causey <[hidden email]> wrote:

I seem to remember this coming up in the past but a quick Google search
doesn't turn anything up.  It appears that GOODS is quite happy to store
a BlockContext but it entirely unable to reinstantiate it.  It attempts
to use BlockContext (ContextPart) class>>basicNew: which throws a
'Contexts must only be created with newForMethod:' error.  Quite a PITA
when you want to store something in a SortedCollection.  Oh well, I
guess I can call OrderedCollection>>sortBy: every time I add a new item
since adding is a comparatively rare action.

Hi Ken,

Is there a reason you can't use one of the data structures in the BTree package? Those can be stored and retrieved from GOODS and are faster if you have a big collection of data anyway.

On a different note, I'd swear that a Seaside project I did about two years ago stored a SortedCollection in GOODS. I'll see if I can't find that image so I can tell you either what workaround I used or figure out what changed to break that behavior.

--Benjamin

Ken Causey-3

Re: Another GOODS issue: BlockContext's

On Thu, 2006-06-01 at 20:04 -0400, Benjamin Pollack wrote:

> On 6/1/06, Ken Causey <[hidden email]> wrote:
> I seem to remember this coming up in the past but a quick
> Google search
> doesn't turn anything up. It appears that GOODS is quite
> happy to store
> a BlockContext but it entirely unable to reinstantiate it. It
> attempts
> to use BlockContext (ContextPart) class>>basicNew: which
> throws a
> 'Contexts must only be created with newForMethod:'
> error. Quite a PITA
> when you want to store something in a SortedCollection. Oh
> well, I
> guess I can call OrderedCollection>>sortBy: every time I add a
> new item
> since adding is a comparatively rare action.
>
>
>
> Hi Ken,
>
> Is there a reason you can't use one of the data structures in the
> BTree package? Those can be stored and retrieved from GOODS and are
> faster if you have a big collection of data anyway.

Actually, I am using a BTree for my root. But in this case I simply
needed a sortable ordered collection, not a dictionary-like structure,
for this particular collection. I don't see how BTree fits in there.
Am I missing something?

> On a different note, I'd swear that a Seaside project I did about two
> years ago stored a SortedCollection in GOODS. I'll see if I can't find
> that image so I can tell you either what workaround I used or figure
> out what changed to break that behavior.

Thank you, I appreciate it.

Ken

>
> --Benjamin

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cdavidshaffer

Re: Another GOODS issue: BlockContext's

In reply to this post by Ken Causey-3

Ken Causey wrote:

>I seem to remember this coming up in the past but a quick Google search
>doesn't turn anything up. It appears that GOODS is quite happy to store
>a BlockContext but it entirely unable to reinstantiate it. It attempts
>to use BlockContext (ContextPart) class>>basicNew: which throws a
>'Contexts must only be created with newForMethod:' error. Quite a PITA
>when you want to store something in a SortedCollection. Oh well, I
>guess I can call OrderedCollection>>sortBy: every time I add a new item
>since adding is a comparatively rare action.
>
>Ken
>
>
>------------------------------------------------------------------------
>
>
>
>

One solution I've used is to create a SortCriteria class which answers
value:value: as needed for a given situation.

David

Benjamin Pollack

Re: Another GOODS issue: BlockContext's

In reply to this post by Ken Causey-3

On 6/1/06, Ken Causey <[hidden email]> wrote:

Actually, I am using a BTree for my root. But in this case I simply
needed a sortable ordered collection, not a dictionary-like structure,
for this particular collection. I don't see how BTree fits in there.
Am I missing something?

No, you're not; I just wasn't thinking very clearly.

> On a different note, I'd swear that a Seaside project I did about two
> years ago stored a SortedCollection in GOODS. I'll see if I can't find
> that image so I can tell you either what workaround I used or figure
> out what changed to break that behavior.

Thank you, I appreciate it.

Unfortunately, my solution at the time was apparently to switch to Magma, so I don't have a good suggestion for you.

--Benjamin