Re: [Zope] boolean weirdness

[Casey Duncan <casey@xxxxxxxx>]

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@xxxxxxxxxx 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
> 
> 
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