Subclass of wtforms.core.FloatField that handles floats with comma delimiters.

commafloat_field.py

"""
For reference wtforms.core.FloatField
-------------------------------------

class FloatField(Field):

    widget = widgets.TextInput()
    
    def __init__(self, label=None, validators=None, **kwargs):
        super(FloatField, self).__init__(label, validators, **kwargs)
    
    def _value(self):
        if self.raw_data:
            return self.raw_data[0]
        elif self.data is not None:
            return text_type(self.data)
        else:
            return ''
    
    def process_formdata(self, valuelist):
        if valuelist:
            try:
                self.data = float(valuelist[0])
            except ValueError:
                self.data = None
                raise ValueError(self.gettext('Not a valid float value'))
"""

class CommaFloatField(FloatField):
    """
    Subclass that handles floats of this format 1.2 or 1,2.        
    """
    def process_formdata(self, valuelist):
        if valuelist:
            try:
                self.data = float(valuelist[0].replace(",", "."))
            except ValueError:
                self.data = None
                raise ValueError(self.gettext('Not a valid float value'))