djago_scalar_list_field.py

"""Quick and dirty ScalarListField for django"""
from django import forms
import six


class ScalarListField(forms.CharField):
    widget = forms.Textarea

    def __init__(self, separator="\n", **kwargs):
        self.separator = separator
        super(ListField, self).__init__(**kwargs)

    def prepare_value(self, value):
        # TODO: Maybe call super()
        if not value:
            return ''
        if not isinstance(value, six.string_types):
            return self.separator.join(value)
        return value

    def to_python(self, value):
        # TODO: Maybe call super
        if not value:
            return []

        return [
            v.strip()
            for v in value.split(self.separator)
        ]