A Serializer on top of djano serializer that handels list fields (from djano non-rel)

pyser.py

"""
@author: Asad K Awan
@copyright: Asad K Awan
@license: BSD 

"""

from django.core.serializers.python import Serializer as PySerializer


class PySer(PySerializer):
    """
    Every thing in django.core.serializers.python is
    great except for:
    1. its handling of foreign keys. we dont want to hit db, just get the id out.
    2. handle list fields.
    Note this won't be de-serializable.
    """
 
    def end_object(self, obj):
        if obj.pk is not None: self._current['id'] = obj.pk
        self.objects.append(self._current)
        self._current = None
 
    def handle_field(self, obj, field):
        value = field._get_val_from_obj(obj)
        if value is None:
            return # don't even store it.

        if isinstance(value, list):
            if len(value) == 0: return
            v = value[0]
            if isinstance(v, (int, long, float, Decimal, 
                             datetime.datetime, datetime.date,
                             datetime.time, unicode)):
                self._current[field.name] = value
            else:
                ps = PySer()
                self._current[field.name] = ps.serialize(value)
            return
 
        if is_protected_type(value):
            self._current[field.name] = value
        else:
            self._current[field.name] = field.value_to_string(obj)
 
 
    def handle_fk_field(self, obj, field):
        fieldName = field.name + '_id'
        value = getattr(obj, fieldName)
        if value is not None: 
            self._current[fieldName] = value
    
    def handle_m2m_field(self, obj, field):
        raise NotImplemented