[Zope] How do I Create a empty file in a ZClass object?

[Jonathan Cyr]

That seems to be the problem, I find ZClasses to fill a role for 
intermediate skill level developers to create rich objects and 
applications.  The replacement at this difficulty level hasn't appeared 
yet.  My impression is that ZClasses will continue in Zope 2.x, but it 
hasn't been enhanced or touched at all.  The ZClasses implementation 
seems to be solid.  There are shortcomings with ZClasses when you try to 
do too much with them.  Some of the Zope 2 books have nice examples are 
how and what you can do with ZClasses.

That said, I picked up Stephen Richter's book on Zope 3, very nicely 
done... Zope 3 seems to be maturing pretty fast, and some/most of the 
new features have been adapted to the older Zope 2 architecture (a 
project called Five).  If you're going to make a large investment in 
time... and you're just getting started, I'd pick up this book, and see 
if you can handle the difficulty level of Zope 3, at this point.  Zope 3 
technologies seem to be "the New Way".   Although advanced, Zope 3 seems 
to be the result of a lot of self-examination of the triumphs and 
mistakes of Zope 2... a few things I picked out.... an re-thought 
organization scheme of naming, libraries, etc.,  the use of 
interfaces/contracts.... Generally cleaner and more pythonic, allowing 
much more power and flexibility... removing much of the mystery of Zope 
2 inner workings and naming conventions.

As for DTML, the old way, DTML is a tag-based way to create web 
interfaces, similar to CFML, PHP, ASP... inline tagging around and 
within the HTML.  The new way, is markedly different, and difficult to 
get your head around at first, called ZPT (Zope Page Templates).  ZPT 
uses XML and an attribute system to embed commands in an HTML page, 
without ruining your ability to use WYSIWYG editors like Dreamweaver, 
etc.  ZPT is highly regarded here on this list, and probably will win 
out in the end.  But there are enough DMTL folks, that DTML will be in 
Zope 3 until ZPT takes over.

There is a Zope 3 mailing list, that might be helpful.

Just my observations and impressions,

-Jon

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> Allen Huang wrote:
>
>> Thanks a million... it works great...
>>  
>> but when you said that ZClasses and DTML are the old way... what is 
>> the new way... I just started using Zope so I not quiet up to date...
>>
>>  
>>
>> would you mind fill me in so I could look it up?
>>
>>
>>
>> */Jonathan Cyr <cyrj at cyr.info>/* wrote:
>>
>>     Hey,
>>
>>     As you'll hear shortly, ZClasses & DTML are the old way to do
>>     things, and are not highly recommended, at this point.   Having
>>     said that, I've had success using them.
>>
>>     To Add a ZClass into anything folderish, I've used...
>>
>>     <dtml-call
>>     "RESPONSE.redirect('manage_addProduct/WWAudioClip/WWAudioClip_factory')">
>>
>>     where WWAudioClip was the name of the Product and its ZClass
>>
>>     I place this in a DTML Method that is at the point I wish the
>>     ZClass object to be created, a target if you wish.  Works fine.
>>
>>     This will call the "Add" method in your ZClass.
>>
>>
>>     To Add a regular file object somewhere, I've used..
>>
>>     <dtml-call "this().manage_addFile(File_object_ID,
>>     File_object_contents, File_object_title, content_type='audio/mpeg')">
>>
>>     Parameters Zope ID to be set, Contents (string, whatever), and
>>     Zope Title, and mime-type (optional)
>>
>>     Google "Zope manage_addFile" for more info
>>
>>     HTH,
>>
>>     Jon 
>>
>>
>>     Allen Huang wrote:
>>
>>>     I want to create a empty file in a ZClass object when I first
>>>     created the ZClass object. How do I do that using DTML??
>>>     ------------------------------------------------------------------------
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>>>
>>>
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>>
>>-- 
>>Jonathan Cyr
>>cyrj at cyr.info
>>
>> ------------------------------------------------------------------------
>> Yahoo! FareChase - Search multiple travel sites in one click. 
>> <http://us.lrd.yahoo.com/_ylc=X3oDMTFqODRtdXQ4BF9TAzMyOTc1MDIEX3MDOTY2ODgxNjkEcG9zAzEEc2VjA21haWwtZm9vdGVyBHNsawNmYw--/SIG=110oav78o/**http%3a//farechase.yahoo.com/> 
>
>
>
>-- 
>Jonathan Cyr
>http://www.cyr.info
>http://www.weddingweblog.com
>cyrj at cyr.info
>

-- 
Jonathan Cyr
http://www.cyr.info
http://www.weddingweblog.com
cyrj at cyr.info