Forum OpenACS Q&A: Any xowiki demo?

is there any xowiki demo or example analogous to the one for xotcl at http://alice.wu-wien.ac.at:8000/s5-xotcl-core-tutorial/slides?

I have checked http://www.openacs.org/xowiki/xowiki and looked at linked materials, but what I need is not covered: what I am lookig for is a development guide, especially with tcl examples regarding ::xowiki::Form

My use case is classical:
- define an object with some properties
- CRUD operations on object
- list of created objects

I also need to define custom arbitrary application constraints on my object's fields as for '-validate' property in ::Generic::Form

Thanks in advance for any tip on this.

Is there a repo for that like the one for xotcl?

- One creates a ::xowiki::Form, which should be the 'specification' of our object. In plain xotcl, this was done in the data model + ::Generic::Form definition.

- Once defined the ::xowiki::Form, one calls http://myserver/xowiki/<;<FORM-INSTANCE-NAME-HERE>>?m=create-new to create the object, and ...?m=edit to edit. The instances we are creating are of class ::xowiki::FormPage

This instead is what I still can't grasp:

how do I define a form suitable for an object like the one in xotcl demo? It's the bare sintax that I am missing...

...
...Xotcl demo snippets
...
...xotcl data model
::xo::db::CrClass create Note -superclass ::xo::db::CrItem \
-pretty_name "Demo Note" -pretty_plural "Demo Notes" \
-slots {
::xo::db::CrAttribute create number -datatype integer -default 0
}

...xotcl form
::Generic::Form create form1 -volatile \
-data $item \
-with_categories true \
-fields {
{item_id:key}
{name:text {label Name}}
{number:text {label Number}}
{text:richtext(richtext),nospell,optional {label Content} {options {editor xinha}}}
{description:text(textarea),nospell,optional {label Description} {html {cols 60 rows 2}}}
}

Maybe that is too much for me... but could ease a lot of stuff in the future!

Snippets above come from the very xotcl-demo, and the object there is subclass of CrItem. Can I connect CrItems to ::xowiki::Form or maybe something like CrItem -> FormPage -> Form? If yes, how?

Thanks for your help

My problem now is that I can't find any example of instantiation of ::xowiki::Form by code, and I can't figure out which parameters supply... Is there any snippet from some code?

I could put it into docs

These are exports of xowiki instances, and not thought for humans! In applications, you will have different IDs, but most of these are provided as well automatically. Please look at the following example. I've added this as well to

http://alice.wu-wien.ac.at:8000/s5-xowiki-tutorial/slides#listing-form-create

all the best
-g

#
# Sample snippet to show, how to create an 
# ::xowiki::Form programmatically
#

# Get package_id by initializing the package
::xo::Package initialize -url /xowiki

set template {
  @listing@
}
set fc {
  listing:code_listing
}

# Create a form instance in memory
set form_id [::xowiki::Form new -destroy_on_cleanup \
             -package_id $package_id \
             -parent_id [$package_id folder_id] \
             -name "en:sample.form" \
             -anon_instances "f" \
             -form {} \
             -text [list $template text/html] \
             -form_constraints $fc]

# save the form to the root folder of the package
$form_id save_new