thanks,

I'll santinize the database onec a while.

cheers,
Stef

On 19-01-14 13:45, Niphlod wrote:
or, if indeed you want all strings fields with NULL values (backends side) or "None" (python side) to map to an empty string '', use

none_value = None
for f in db.table.fields:
    if db.table[f].type == 'string':
        db(db.table[f] == None).update(f='')

On Sunday, January 19, 2014 3:21:49 AM UTC+1, Anthony wrote:

        but I mean the field is empty / Null / None (type),
        which is translated by web2py into a string value 'None'.


    None is translated into a string value as 'None' by Python, not
    web2py. If you want different behavior, you have to be explicit
    (no reason to assume the default behavior should be an empty
    string). You can achieve that by setting the represent attribute
    of the field:

    |
    Field('myfield',represent=lambdav,r:''ifv isNoneelsev)
    |

    or more simply:

    |
    Field('myfield',map_none='')
    |

    Those methods will work in the grid and SQLFORMs, but not if you
    simply do {{=row.myfield}} somewhere. In that case, you would have
    to do something like {{=row.myfield or ''}}, or use the
    Rows.render() method to extract the row, which will automatically
    apply the "represent" function -- {{=rows.render(0).myfield}}.

    Anthony

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