[Grok-dev] What's the shortest path supporting rich clients

Martijn Faassen faassen at startifact.com
Fri Aug 22 21:06:50 EDT 2008

Hi there,

rmoskal wrote:
> Seeing that GROK is at version .13, I'm wondering what the shortest path to
> supporting a rich client interface would be.  The YUI integration works fine
> so I'll go with that.  But neither grok.JSON or grok.XMLRPC actually know
> how to serialize any schema based domain objects yet.

> I can go json or xml.  It's a new project.  I'm inclining towards
> z3c.schema2xml, but when I include that in setup.py, and run the buildout
> it' is not found.

That's because z3c.schema2xml hasn't been publically released yet. I use 
it a lot for a project though. You can make it (or any non released 
package) work by doing the following:

$ svn co svn://svn.zope.org/repos/main/z3c.schema2xml/trunk z3c.schema2xml

(you could make this an svn:external)

Then you can do this in buildout, adding z3c.schema2xml:

develop = . z3c.schema2xml

and of course add z3c.schema2xml as a dependency in setup.py. Re-run 
buildout, and you can work with the development version of 
z3c.schema2xml. Insider trick: if you want to make sure it's using that 
version of the package, you can look at the source of bin/test.py

This works for any package in SVN and it's useful if you want to develop 
on a package while using it in an application. If this isn't documented 
yet on grok.zope.org, someone should document it. :)

I should make a public release of z3c.schema2xml at some point, too. :)

> Given the state of GROK, what's the shortest path for me to be sending
> serialized domain objects to the client for use with YUI?

If I understand you correctly, you want an easy way to serialize 
(schema-described?) models to XML. z3c.schema2xml can certainly do that 
for you, though it may not support all schema fields you want (this can 
certainly be added, though).

I don't know whether any Zope 3 schema to JSON conversion systems exist. 
It'd not be too hard to write one analogously to z3c.schema2xml.



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