Synnefo

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from django.db import models

from south.modelsinspector import add_introspection_rules

class SeparatedValuesField(models.TextField):

    description = ("Stores list of values as a TextField,"

                   " separated by a delimiter.")

    __metaclass__ = models.SubfieldBase

    def __init__(self, *args, **kwargs):

        self.delimiter = kwargs.pop('delimiter', ',')

        super(SeparatedValuesField, self).__init__(*args, **kwargs)

    def to_python(self, value):

        if not value:

            return []

        if isinstance(value, list):

            return value

        return value.split(self.delimiter)

    def get_prep_value(self, value):

        if not value:

            return

        assert(isinstance(value, list) or isinstance(value, tuple))

        return self.delimiter.join([unicode(s) for s in value])

    def value_to_string(self, obj):

        value = self._get_val_from_obj(obj)

        return self.get_prep_value(value)

add_introspection_rules([

    (

        [SeparatedValuesField],  # Class(es) these apply to

        [],         # Positional arguments (not used)

        {           # Keyword argument

            "delimiter": ["delimiter", {"default": ","}],

        },

    ),

], ["^synnefo\.db\.fields\.SeparatedValuesField"])