Hi, Oliver Your code very nearly works. I would say "If it were a Python..." but then, well... Some not-very-different code that will work: <dtml-with "todo.createInObjectManager(REQUEST['todo_id'],REQUEST)"> <dtml-call expr="propertysheets.todo_info.manage_changeProperties({'todo_title':'Do that'})"> </dtml-with> If you are altering something on a particular propertysheet, you need to tell the propertysheet that you are changing it. You can look at the source for the difference between manage_changeProperties() and manage_editProperties(). I could not see much difference, except that manage_editProperties() seems to require all of the values to be in REQUEST, and manage_changeProperties() can additionally take dictionaries or keyword values for parameters. I think sticking with manage_changeProperties() is your best bet. -- Jim Washington Olivier Laurent wrote:

Hello,

I've created a zclass to manage a list of tasks to be done with some properties called todo_title, todo_priority, todo_expiry,... The propertysheet is called 'todo_info', the product 'ToDoProduct' and the zclass 'todo'

Each instance is created in a folder called 'todos' with names like 'a982706331', 'a456812195',...

I put the instance id in a variable called 'todo_id'

I'm trying to change zclass instance properties. I followed the Zope Developer's Guide : <dtml-call "a982706331.manage_changeProperties({'todo_title':'Do this'})"> but nothing changes (no error messages). I tried a lot of different things like :

<dtml-with "todo.createInObjectManager(REQUEST['todo_id'],REQUEST)"> <dtml-call expr="propertysheets.todo_info.manage_editProperties({'todo_title':'Do that'})"> </dtml-with>

or

<dtml-with todo_id> <dtml-call "manage_editProperties({'todo_title':'Do this'})"> </dtml-with>

or

<dtml-with todo_id> <dtml-call "manage_changeProperties({'todo_title':'Do that'})"> </dtml-with>

Could someone help me fix the problem ?

Also : what's the difference between 'manage_editProperties' and 'manage_changeProperties' ?