[Zope-dev] Please HELP: Nested ZClass, Nested instance
Park, Karl
Karl.Park@korea.bowneglobal.com
Tue, 23 May 2000 14:50:56 +0900
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Hello Karl, who has same name as me:-)
Yes, I can create child zclass nested in parent zclass according to the
Howto on management interface.
And the zclasses were inherited from Object Manager and Catalog aware class.
But still I can't do it programatically.
If you know how to do it, your advice would be appreciated.
(Due to the schedule, I decided to just go ahead according to Rik
Hoekstra's advice)
I found a interesting fact.
When we access some ZClass in the product folder, the typical syntax used
is(in DTML)
this().Control_Panel.Products['MyProductFolderName'](DTML)
self.Control_Panel.Products['MyProductFolderName'] (Python)
This syntax seems to say that Products is a dictionary object of Python,
because
we can access each product folder by key.
But when I try this,
<dtml-var "_.len(this().Control_Panel.Products">
this returns just "1"
But interestingly,
<dtml-in "this().Control_Panel.Products.objectIds()>
- or -
<dtml-in
"this().Control_Panel.Products['MyProductFolderName'].objectIds()">
returns expected results.
Should I think "Product" folder under "Control_Panel" to be a kind of
dictionary object?
Thanks a lot
Karl
Message: 17
To: "Zope-Dev \(E-mail\)" <zope-dev@zope.org>
Subject: Re: [Zope-dev] Please HELP: Nested ZClass, Nested instance
From: Karl Anderson <karl@digicool.com>
Organization: Digital Creations
Date: 22 May 2000 15:34:57 -0700
"Park, Karl" <Karl.Park@korea.bowneglobal.com> writes:
> I created a ZClass in the Product folder. And anther ZClass under the
> ZClass(thus nested class)
> To do it, I created a DTML Method which accepts user's input and then, if
> needed, it have to create an object.
> First part is to create the parent object, which works just fine.
> But the sencond part to create the child object doesn't seem to work.
> If I take the easy way, that is, creating othere ZClass on the top of the
> products folder of Control Panel, I can do it.
> But I don't think it is a good desing from the perspective of OOP....
I had some hassles with this recently. There's a HOWTO at:
http://www.zope.org/Members/gtk/containers
Can you create the child zclass from the manage screen inside the
parent zclass?
Does the parent zclass inherit from ObjectManager before any other
superclasses?
--
Karl Anderson karl@digicool.com
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<TITLE>Re: [Zope-dev] Please HELP: Nested ZClass, Nested =
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<BODY>
<P><FONT SIZE=3D2>Hello Karl, who has same name as me:-)</FONT>
</P>
<P><FONT SIZE=3D2>Yes, I can create child zclass nested in parent =
zclass according to the Howto on management interface.</FONT>
<BR><FONT SIZE=3D2>And the zclasses were inherited from Object Manager =
and Catalog aware class.</FONT>
</P>
<P><FONT SIZE=3D2>But still I can't do it programatically.</FONT>
<BR><FONT SIZE=3D2>If you know how to do it, your advice would be =
appreciated.</FONT>
<BR><FONT SIZE=3D2>(Due to the schedule, I decided to just go ahead =
according to Rik Hoekstra's advice)</FONT>
</P>
<P><FONT SIZE=3D2>I found a interesting fact.</FONT>
<BR><FONT SIZE=3D2>When we access some ZClass in the product folder, =
the typical syntax used is(in DTML)</FONT>
<BR> <FONT =
SIZE=3D2>this().Control_Panel.Products['MyProductFolderName'](DTML)</FON=
T>
<BR> <FONT =
SIZE=3D2>self.Control_Panel.Products['MyProductFolderName'] =
(Python)</FONT>
</P>
<P><FONT SIZE=3D2>This syntax seems to say that Products is a =
dictionary object of Python, because </FONT>
<BR><FONT SIZE=3D2>we can access each product folder by key.</FONT>
<BR><FONT SIZE=3D2>But when I try this,</FONT>
<BR> <FONT =
SIZE=3D2><dtml-var =
"_.len(this().Control_Panel.Products"></FONT>
<BR><FONT SIZE=3D2>this returns just "1"</FONT>
<BR><FONT SIZE=3D2>But interestingly, </FONT>
<BR> <FONT =
SIZE=3D2><dtml-in =
"this().Control_Panel.Products.objectIds()></FONT>
<BR> =
<FONT SIZE=3D2>- or - =
</FONT>
<BR> <FONT =
SIZE=3D2><dtml-in =
"this().Control_Panel.Products['MyProductFolderName'].objectIds()&q=
uot;></FONT>
<BR><FONT SIZE=3D2>returns expected results.</FONT>
</P>
<P><FONT SIZE=3D2>Should I think "Product" folder under =
"Control_Panel" to be a kind of dictionary object?</FONT>
<BR><FONT SIZE=3D2>Thanks a lot</FONT>
<BR><FONT SIZE=3D2>Karl</FONT>
</P>
<P><FONT SIZE=3D2>Message: 17</FONT>
<BR><FONT SIZE=3D2>To: "Zope-Dev \(E-mail\)" =
<zope-dev@zope.org></FONT>
<BR><FONT SIZE=3D2>Subject: Re: [Zope-dev] Please HELP: Nested ZClass, =
Nested instance</FONT>
<BR><FONT SIZE=3D2>From: Karl Anderson <karl@digicool.com></FONT>
<BR><FONT SIZE=3D2>Organization: Digital Creations</FONT>
<BR><FONT SIZE=3D2>Date: 22 May 2000 15:34:57 -0700</FONT>
</P>
<P><FONT SIZE=3D2>"Park, Karl" =
<Karl.Park@korea.bowneglobal.com> writes:</FONT>
</P>
<P><FONT SIZE=3D2>> I created a ZClass in the Product folder. And =
anther ZClass under the</FONT>
<BR><FONT SIZE=3D2>> ZClass(thus nested class)</FONT>
</P>
<P><FONT SIZE=3D2>> To do it, I created a DTML Method which accepts =
user's input and then, if</FONT>
<BR><FONT SIZE=3D2>> needed, it have to create an object.</FONT>
</P>
<P><FONT SIZE=3D2>> First part is to create the parent object, which =
works just fine. </FONT>
<BR><FONT SIZE=3D2>> But the sencond part to create the child object =
doesn't seem to work. </FONT>
<BR><FONT SIZE=3D2>> If I take the easy way, that is, creating =
othere ZClass on the top of the</FONT>
<BR><FONT SIZE=3D2>> products folder of Control Panel, I can do it. =
</FONT>
<BR><FONT SIZE=3D2>> But I don't think it is a good desing from the =
perspective of OOP....</FONT>
</P>
<P><FONT SIZE=3D2>I had some hassles with this recently. There's =
a HOWTO at:</FONT>
</P>
<P><FONT SIZE=3D2><A =
HREF=3D"http://www.zope.org/Members/gtk/containers" =
TARGET=3D"_blank">http://www.zope.org/Members/gtk/containers</A></FONT>
</P>
<P><FONT SIZE=3D2>Can you create the child zclass from the manage =
screen inside the</FONT>
<BR><FONT SIZE=3D2>parent zclass?</FONT>
</P>
<P><FONT SIZE=3D2>Does the parent zclass inherit from ObjectManager =
before any other</FONT>
<BR><FONT SIZE=3D2>superclasses?</FONT>
</P>
<P><FONT SIZE=3D2>-- </FONT>
<BR><FONT SIZE=3D2>Karl =
Anderson &nbs=
p; &nbs=
p; karl@digicool.com</FONT>
</P>
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