I think the problem is that the string "0" is not a false value. Both "0" and "1" are true values. All non-empty strings are true in Python. Generally you would use integer values in a boolean. The integer 0 is indeed considered false. From a web form, you can use marshalling to make the value into an integer such as: <input type="radio" name="mybool:int" value="1" />True <input type="radio" name="mybool:int" value="0" />False See: http://www.zope.org/Members/Zen/howto/FormVariableTypes for more details on marshalling. Its very useful. Alternately, you could use an empty string as a false value. hth, Casey On Thursday 02 May 2002 03:36 pm, vsbabu@vsbabu.org allegedly wrote:

Hi,

We've a ZClass in which there is a property fund_size called boolean.

We had to use a radio group in the form like fund_size:boolean and values as 1 and 0 for true and false.

However, when we had to retrieve it for pre-checking the radio group according to the value in the property sheet, after some trial and error we found that <dtml-if "fund_size=='1'"> works instead of <dtml-if fund_size> as would've expected due to "boolean" property.

Took some time to get to the string comparison...

$.02

_______________________________________________ Zope maillist - Zope@zope.org http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )