[Zope3-Users] OOBTree instances lose attributes upon restart

[Douglas Douglas]

Hi everyone.

I've been fighting with this for a while now. So I mail the list for a
suggestion.

I have a `Variable` class wich I subclass from OOBTree, because I need a
dictionary with the min, max options that OOBTree methods give. My object is
supposed to store datetime.datetime instances as keys and floats numbers as
values. eg: temperature[datetime(2007, 4, 6, 12, 8)] = 25.8

I didn't use BTreeContainer because only takes strings as keys, and I don't
want to map datetime to strings and back.

Here's my class definition:

class Variable(OOBTree, Contained):

implements(IVariable, IAttributeAnnotatable)

name = None
units = None

I start the server and everything works like a charm. My AddForm works OK for
the Variable class. I checked its create() method (with assert statements) and
the returned instances contain the name and units attributes set from the form.

But if I stop the server and restart later, my data (datetimes and floats) are
still there, but my name and units attributes are None!!

I tried to subclass from (OOBTree, Persistent, Contained) too, and it didn't
work either.

If I subclass only from (PersistentDict) everything works. Data and attributes
are mantained upon restart, but I lose the min, max functionality I like :(

What could be the problem or a possible solution to this issue?

Thanks.


 

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[Zope3-Users] Default value for an interface attribute

[Douglas Douglas]

Hi everybody.

I have this interface:

class INews(IPage):
A news page for the application.


date = Date(
title=_(uPublication Date),
description=_(uThe intended date for this news),
default=date.today(),
required=False
)

My problem is that I started the instance on February 21, and when I use an
AddForm for this interface, my form shows that date instead of today's date,
which is what I need.

It seems like the default attribute is set once upon server start and then
never changed. Is that the case? If it is, could you please point me to a
better approach for this?

Thanks.


 

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Re: [Zope3-Users] Re: Default value for an interface attribute

[Douglas Douglas]

--- Raphael Ritz [EMAIL PROTECTED] wrote:

 How about checking whether the value of 'default' is a
 callable and if so call it to obtain the default value.
 That way
 
 defautl=date.today
 
 (without the ())should do what Douglas expects (maybe
 this is even the case already?).
 

I tried this way, but raises this Exception:

ConfigurationError: ('Invalid value for', 'interface', (built-in method today
of type object at 0xb79465c0, type 'datetime.date'))



 

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[Zope3-Users] Which packages to remove from etc/package-includes

[Douglas Douglas]

Hi everybody.

I know a similar question was already post here:
http://mail.zope.org/pipermail/zope3-users/2005-October/001142.html

But I didn't understood well Stephan's answer (sorry!). I think I'm looking for
a solution like Garrett's (though it wasn't specific).

I'm just wondering which *-configure.zcml or *-meta.zcml files can be removed
from the etc/package-includes dir of an instance in order to get running the
minimum Zope3 but in a stable way.

For example, I know my application won't be using any sql related stuff, so I
think is possible to remove the sqlscript-configure.zcml file. I believe the
less *-configure.zcml and *-meta.zcml files are in this directory the faster
Zope3 loads, right?

But if I remove every file except the apidoc related, then Zope3 won't even
start because it complains about preference-*.zcml files. I got Zope3 running
again testing and reading error messages (just like Garrett suggests), but I
think this way could be dangerous in case I miss something important.

Is this issue important or there's no real difference in how many packages get
included on start?

Thanks.




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