[Zope3-Users] Re: updating a zodb with a SchemaManager
Lorenzo Gil Sánchez wrote: Hi, I've been using a zope.app.generations.interfaces.ISchemaManager to keep my database up to date with respect to the changes in the models of my application and everything is well so far. Now I have a tricky situation. My model had an attribute and now I changed that attribute to be read only. Before: --- class IModel(Interface): attr1 = zope.schema.TextLine() class Model(Persistent): implements(IModel) def __init__(self, attr1=None): self.attr1 = attr1 After: -- class IModel(Interface): attr1 = zope.schema.TextLine(readonly=True) attr2 = zope.schema.TextLine() class Model(Persistent): implements(IModel) def __init__(self, attr2=None): self.attr2 = attr2 def _getAttr1(self): return self.attr2.lower() attr1 = property(_getAttr1) As you can see, now attr1 is a computed attribute from attr2. When updating the old Model objects I add the 'attr2' attribute but I can't remove the old 'attr1' attribute since is still defined in Model but is a totally different thing. I can forget about removing the 'attr1' attribute and things keep working well. The problem is a waste of space in the database since that information is still there but impossible to retrieve, right? I have a related question: is attr1 still saved in the database in the newer version no matter is a read only python property or does the ZODB handle this case? As far as I know ZODB only skip those attributes beginning with _v_ (for volatile), but don't know what it does with python properties... Has anyone ever reached a similar situation? Any solution? You can do this on your instance : del obj.__dict__['attr1'] Jürgen ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: Any performance issues with the macro attribute in the z3c:template directive?
Andreas Johnsen wrote: Hei all Zopers, I find the macro parameter in the z3c:template very useful for working with templates for viewlets and pagelets. I guess it's slower to extract a html-snippet from within a page template file (by including a macro parameter) then including the entire page template file (by not including the macro parameter). So before implementing this technique on a large scale, I want to ask if anyone have experienced any performance issues with this technique? No, there is no performance issue on this. The TAL engine compiles the hole template into memory and caches it. Accessing a macro is just a dictionary lookup. We are using this technique in large projects. Jürgen -- Lovely Systems, senior developer phone: +43 5572 908060, fax: +43 5572 908060-77 Schmelzhütterstraße 26a, 6850 Dornbirn, Austria ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] query all objects in catalog
Is there a way to query a zope3 catalog for all objects that have been indexed? I see that there is a way to ask an index for the number of documents it currently has indexed, via documentCount() in the IStatistics interface, but I can't a good way get back all objects that have been indexed. Robert ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] query all objects in catalog
On Mar 6, 2008, at 1:42 PM, Robert Marianski wrote: Is there a way to query a zope3 catalog for all objects that have been indexed? I see that there is a way to ask an index for the number of documents it currently has indexed, via documentCount() in the IStatistics interface, but I can't a good way get back all objects that have been indexed. The intid utility kinda sorta does what you want, depending on how careful you were in your intid use. zc.catalog's extents do exactly what you want, but it doesn't sound like you are using that right now. Gary ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] query all objects in catalog
On Thu, Mar 06, 2008 at 02:11:40PM -0500, Gary Poster wrote: On Mar 6, 2008, at 1:42 PM, Robert Marianski wrote: Is there a way to query a zope3 catalog for all objects that have been indexed? I see that there is a way to ask an index for the number of documents it currently has indexed, via documentCount() in the IStatistics interface, but I can't a good way get back all objects that have been indexed. The intid utility kinda sorta does what you want, depending on how careful you were in your intid use. I was using grok, so however that set it up. The intid utility did indeed have all the objects, but it had more objects than were indexed with the catalog ... so I would have to filter them out myself. Not sure if that's what you mean. zc.catalog's extents do exactly what you want, but it doesn't sound like you are using that right now. I'm not familiar with extents, I'll give them a look. Thanks. Robert ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] Re: updating a zodb with a SchemaManager
El jue, 06-03-2008 a las 09:11 +0100, Jürgen Kartnaller escribió: Has anyone ever reached a similar situation? Any solution? You can do this on your instance : del obj.__dict__['attr1'] Oh, so stupidly simple and it did the job perfectly :-) Thanks Jürgen! Lorenzo ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] Re: updating a zodb with a SchemaManager
On Thu, Mar 6, 2008 at 3:11 AM, Jürgen Kartnaller [EMAIL PROTECTED] wrote: You can do this on your instance : del obj.__dict__['attr1'] Of course, if that's *all* you do to it, you'll need to set the changed flag yourself: obj._p_changed = True -Fred -- Fred L. Drake, Jr.fdrake at gmail.com Chaos is the score upon which reality is written. --Henry Miller ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] query all objects in catalog
On Mar 6, 2008, at 2:18 PM, Robert Marianski wrote: On Thu, Mar 06, 2008 at 02:11:40PM -0500, Gary Poster wrote: On Mar 6, 2008, at 1:42 PM, Robert Marianski wrote: Is there a way to query a zope3 catalog for all objects that have been indexed? I see that there is a way to ask an index for the number of documents it currently has indexed, via documentCount() in the IStatistics interface, but I can't a good way get back all objects that have been indexed. The intid utility kinda sorta does what you want, depending on how careful you were in your intid use. I was using grok, so however that set it up. The intid utility did indeed have all the objects, but it had more objects than were indexed with the catalog ... so I would have to filter them out myself. Not sure if that's what you mean. Yup. zc.catalog's extents do exactly what you want, but it doesn't sound like you are using that right now. I'm not familiar with extents, I'll give them a look. Thanks. You can either be more careful about what you put in your intid utility (the standard Zope 3 subscribers are more indiscriminate than you might expect), or you can set up an extent on your catalog that filters out what you don't want and use that. Gary ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] clearing grouped widgets in z3c.form
Widgets are cleared because after zope processes the editform (with Done
or Delete button pressed), the selectedItem in the table becomes None,
so the addform is then displayed. In the example, the addform and
editform have distinct prefixes, so their fields have distinct names in
the request object. In particular, the editform doesnt set any of the
addform's fields in the request object, so the addform returns with
empty/default field values.
The problem is that widgets of grouped fields get the BaseForm's form.
prefix, so the group's widgets in the edit and add forms have the same
key in the request object and thus the editform's grouped widgets are
named the same as the addform's widgets, so those widget's editform
values show up in the addform. (In contrast, non-grouped widgets have
the add. vs edit. prefix of their parent form.)
One way to fix this is to give groups the prefix of their parentForm.
Groups already pass their prefix along to the widgets they create, so
those widgets would no longer be prefixed with BaseForm's form.
prefix. Alternatively, setting ignoreRequest=True for the addform (so
that the addform ignores the insufficiently-distinctly-named values in
the request object) may work sometimes (addforms can often ignore
requests) but seems less correct.
Proposed fix: in z3c/form/group.py, class Group, method updateWidgets,
anywhere before self.widgets.update() (or after self.parentForm is
assigned in __init__), add line:
self.prefix = util.expandPrefix(self.parentForm.prefix)
(and of course from z3c.form import util)
John
John wrote:
In modifying the formdemo/addressbook example to use groups, I found
that fields in groups are not cleared to their default values when the
Done or Delete button is pressed in the editform, resulting in an
addform with values from the previous editform. Fields that are not
in groups are cleared (as in the original example, which had no
groups); only fields in groups have this problem. How can I fix
this? And more generally, how are widgets cleared?
Relevant code is attached. The editform class is below.
thanks!
---
class CarEditForm(group.GroupForm,form.EditForm):
form.extends(group.GroupForm,form.EditForm)
noChangesMessage = None
fields = field.Fields(ICar).select('nPassengers')
groups=(carGroup1,)
prefix = 'car.edit.'
@button.buttonAndHandler(u'Delete')
def handleDelete(self, action):
# Delete the item from the address book
item = self.getContent()
addressbook = item.__parent__
del addressbook[item.__name__]
# Reset the selected item
ISession(self.request)[SESSION_KEY]['selectedItem'] = None
@button.buttonAndHandler(u'Done')
def handleDone(self, action):
# Reset the selected item
ISession(self.request)[SESSION_KEY]['selectedItem'] = None
---
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[Zope3-Users] plz help to convert pdf report in landscape using z3c.ml
Hi, I am using Z3C.RML for creating PDF report. But i wants to create it in landscape mode. please help me regarding this. Thanks Rahul Bhaskar ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
