or better
def format_function (value)
formatted_value = .....
return formatted_value
db.tablename.fieldname.represent= lambda value,row: format_function(value)
if value else "Not Standard Time"
Il giorno giovedì 25 ottobre 2012 13:31:43 UTC+2, Paolo Caruccio ha scritto:
>
> Did you try:
>
> db.tablename.fieldname.represent= lambda value: value if value else 'NT"
>
> ?
> web2py book reference
> http://web2py.com/books/default/chapter/29/06?search=represent#Record-representation
>
>
> Il giorno giovedì 25 ottobre 2012 03:20:29 UTC+2, Joe Barnhart ha scritto:
>>
>> I have an application where I expect "None" items in my database and I
>> want to format them to "NT". It is an app that uses time standards, and if
>> there is no standard present I expect a "None" in the database which
>> translates to a field of "No Time" or "NT".
>>
>> The problem is that the current implementation of formatter in the Field
>> class tests the value for "None" and escapes before the formatter is called.
>>
>> I can see why this behavior might be expected in a lot of cases, but it
>> seems extreme to deny the ability to format "None" into a more pleasing
>> form for those applications that could benefit from it. Here is the
>> offending part of formatter (located in gluon/dal.py):
>>
>> def formatter(self, value):
>> requires = self.requires
>> if value is None or not requires:
>> return value
>>
>> If I change the above to:
>>
>> def formatter(self, value):
>> requires = self.requires
>> if not requires:
>> return value
>>
>> I get my desired behavior, which is to pass "None" to my formatter which
>> is implemented as part of a custom Validator object. I realize the code
>> now has to go "further" for cases where the value is None, but is it really
>> safe to assume nobody will ever want to "format" None into another string?
>> Not in my case, at least!
>>
>> Joe B.
>>
>>
>>
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