Class FloatField

mongoengine/fields.py:373–412

Floating point number field.

class FloatField(BaseField):
    """Floating point number field."""

    def __init__(self, min_value=None, max_value=None, **kwargs):
        """
        :param min_value: (optional) A min value that will be applied during validation
        :param max_value: (optional) A max value that will be applied during validation
        :param kwargs: Keyword arguments passed into the parent :class:`~mongoengine.BaseField`
        """
        self.min_value, self.max_value = min_value, max_value
        super().__init__(**kwargs)

    def to_python(self, value):
        try:
            value = float(value)
        except ValueError:
            pass
        return value

    def validate(self, value):
        if isinstance(value, int):
            try:
                value = float(value)
            except OverflowError:
                self.error("The value is too large to be converted to float")

        if not isinstance(value, float):
            self.error("FloatField only accepts float and integer values")

        if self.min_value is not None and value < self.min_value:
            self.error("Float value is too small")

        if self.max_value is not None and value > self.max_value:
            self.error("Float value is too large")

    def prepare_query_value(self, op, value):
        if value is None:
            return value

        return super().prepare_query_value(op, float(value))


class DecimalField(BaseField):