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<div class="highlight"><pre>import pickle

from django.db.models import Field, BLANK_CHOICE_DASH
from django.utils.translation import ugettext_lazy, string_concat
from django.utils.encoding import smart_unicode
from django.utils.functional import curry

class PickledManyToManyField(Field):
 def __init__(self, to, to_field=None, **kwargs):
 to_field = to_field or to._meta.pk.name
 kwargs[&#39;verbose_name&#39;] = kwargs.get(&#39;verbose_name&#39;, None)
 self.my_rel = PickledManyToManyRel(to, to_field,
 num_in_admin=kwargs.pop(&#39;num_in_admin&#39;, 0),
 filter_interface=kwargs.pop(&#39;filter_interface&#39;, None),
 limit_choices_to=kwargs.pop(&#39;limit_choices_to&#39;, None),
 raw_id_admin=kwargs.pop(&#39;raw_id_admin&#39;, False))
 if self.my_rel.raw_id_admin:
 kwargs.setdefault(&#39;validator_list&#39;, []).append(self.isValidIDList)
 super(PickledManyToManyField, self).__init__(**kwargs)

if self.my_rel.raw_id_admin:
 msg = ugettext_lazy(&#39;Separate multiple IDs with commas.&#39;)
 else:
 msg = ugettext_lazy(&#39;Hold down &quot;Control&quot;, or &quot;Command&quot; on a Mac, to select more than one.&#39;)
 self.help_text = string_concat(self.help_text, &#39; &#39;, msg)

def get_attname(self):
 return &#39;%s_%ss&#39; % (self.name, self.my_rel.to._meta.pk.name)

def set_attributes_from_rel(self):
 self.name = self.name or self.get_attname()
 self.verbose_name = self.verbose_name or self.my_rel.to._meta.verbose_name
 self.my_rel.field_name = self.my_rel.field_name or self.my_rel.to._meta.pk.name

def contribute_to_class(self, cls, name):
 super(PickledManyToManyField, self).contribute_to_class(cls, name)
 self.set_attributes_from_rel()
 self.related_query_name = lambda self: opts.object_name.lower()
 setattr(cls, self.name, PickledManyRelatedObjectDescriptor(self))
 standard_init = cls.__init__
 def unpickling_init(slf, *args, **kwargs):
 standard_init(slf, *args, **kwargs)
 value = getattr(slf, self.attname)
 if not isinstance(value, set):
 value = pickle.loads(value)
 setattr(slf, self.attname, value)
 cls.__init__ = unpickling_init

def db_type(self):
 return &#39;text&#39;

def to_python(self, value):
 return pickle.loads(value)

def get_db_prep_save(self, value):
 return pickle.dumps(value)

###############################################
 # this is just copy-pasted from ManyToManyField
 def get_manipulator_field_objs(self):
 from django import oldforms
 if self.my_rel.raw_id_admin:
 return [oldforms.RawIdAdminField]
 else:
 choices = self.get_choices_default()
 return [curry(oldforms.SelectMultipleField,
 size=min(max(len(choices), 5), 15),
 choices=choices)]

def get_choices_default(self):
 return self.get_choices(include_blank=False)

def get_choices(self, include_blank=True, blank_choice=BLANK_CHOICE_DASH):
 &quot;Returns a list of tuples used as SelectField choices for this field.&quot;
 first_choice = include_blank and blank_choice or []
 if self.choices:
 return first_choice + list(self.choices)
 rel_model = self.my_rel.to
 if hasattr(self.my_rel, &#39;get_related_field&#39;):
 lst = [(getattr(x, self.my_rel.get_related_field().attname), smart_unicode(x))
 for x in rel_model._default_manager.complex_filter(self.my_rel.limit_choices_to)]
 else:
 lst = [(x._get_pk_val(), smart_unicode(x))
 for x in rel_model._default_manager.complex_filter(self.my_rel.limit_choices_to)]
 return first_choice + lst

def isValidIDList(self, field_data, all_data):
 &quot;Validates that the value is a valid list of foreign keys&quot;
 mod = self.my_rel.to
 try:
 pks = map(int, field_data.split(&#39;,&#39;))
 except ValueError:
 # the CommaSeparatedIntegerField validator will catch this error
 return
 objects = mod._default_manager.in_bulk(pks)
 if len(objects) != len(pks):
 badkeys = [k for k in pks if k not in objects]
 raise validators.ValidationError, ungettext(&quot;Please enter valid %(self)s IDs. The value %(value)r is invalid.&quot;,
 &quot;Please enter valid %(self)s IDs. The values %(value)r are invalid.&quot;, len(badkeys)) % {
 &#39;self&#39;: self.verbose_name,
 &#39;value&#39;: len(badkeys) == 1 and badkeys[0] or tuple(badkeys),
 }

# end of copy-past
 ##################

class PickledManyRelatedObjectDescriptor(object):
 def __init__(self, field_with_rel):
 self.field = field_with_rel

def __get__(self, instance, instance_type=None):
 if instance is None:
 raise AttributeError, &quot;%s must be accessed via instance&quot; % self.field.name

self.field.renew_attfield(instance)
 val = getattr(instance, self.field.attname)

rel_model = self.field.my_rel.to
 superclass = rel_model._default_manager.__class__
 RelatedManager = create_pickled_many_related_manager(superclass)

manager = RelatedManager(
 model=rel_model,
 core_filters={&#39;%s__in&#39; % self.field.my_rel.field_name: val},
 instance=instance,
 attname=self.field.attname,
 )

return manager

def __set__(self, instance, value):
 if instance is None:
 raise AttributeError, &quot;%s must be accessed via instance&quot; % self._field.name
 # Set the value of the related field
 val = set()
 for obj in value:
 try:
 val.add(getattr(obj, self.field.my_rel.get_related_field().attname))
 except AttributeError:
 pass
 setattr(instance, self.field.attname, val)

# Clear the cache, if it exists
 try:
 delattr(instance, self.field.get_cache_name())
 except AttributeError:
 pass

class PickledManyToManyRel(object):
 def __init__(self, to, field_name, num_in_admin=0, filter_interface=None, limit_choices_to=None, raw_id_admin=False):
 self.to = to
 self.field_name = field_name
 self.num_in_admin = num_in_admin
 self.filter_interface = filter_interface
 if limit_choices_to is None:
 limit_choices_to = {}
 self.limit_choices_to = limit_choices_to
 self.edit_inline = False
 self.raw_id_admin = raw_id_admin
 self.multiple = True

self.related_name = &#39;%s_%s_set&#39; % (to._meta.pk.name, field_name)

assert not (self.raw_id_admin and self.filter_interface), &quot;ManyToManyRels may not use both raw_id_admin and filter_interface&quot;

# get_related_field = ManyToOneRel.get_related_field
 def get_related_field(self):
 &quot;Returns the Field in the &#39;to&#39; object to which this relationship is tied.&quot;
 return self.to._meta.get_field(self.field_name)

def create_pickled_many_related_manager(superclass):
 class RelatedManager(superclass):
 def __init__(self, model=None, core_filters=None, instance=None, attname=None):
 super(RelatedManager, self).__init__()
 self.model = model
 self.core_filters = core_filters
 self.instance = instance
 self.attname = attname

def get_query_set(self):
 return superclass.get_query_set(self).filter(**(self.core_filters))

def add(self, *objs):
 obj_pks = (obj.pk for obj in objs)
 setattr(self.instance, self.attname, getattr(self.instance, self.attname).union(obj_pks))
 add.alters_data = True

def remove(self, *objs):
 obj_pks = (obj.pk for obj in objs)
 setattr(self.instance, self.attname, getattr(self.instance, self.attname).difference(obj_pks))
 remove.alters_data = True

def clear(self):
 setattr(self.instance, self.attname, set())
 clear.alters_data = True

def create(self, **kwargs):
 new_obj = self.model(**kwargs)
 new_obj.save()
 self.add(new_obj)
 return new_obj
 create.alters_data = True
 return RelatedManager
</pre></div>
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BBCODE Copy To Clipboarddone!

[color=#008000][b]import[/b][/color] [color=#0000FF][b]pickle[/b][/color]

[color=#008000][b]from[/b][/color] [color=#0000FF][b]django.db.models[/b][/color] [color=#008000][b]import[/b][/color] Field, BLANK_CHOICE_DASH
[color=#008000][b]from[/b][/color] [color=#0000FF][b]django.utils.translation[/b][/color] [color=#008000][b]import[/b][/color] ugettext_lazy, string_concat
[color=#008000][b]from[/b][/color] [color=#0000FF][b]django.utils.encoding[/b][/color] [color=#008000][b]import[/b][/color] smart_unicode
[color=#008000][b]from[/b][/color] [color=#0000FF][b]django.utils.functional[/b][/color] [color=#008000][b]import[/b][/color] curry

[color=#008000][b]class[/b][/color] [color=#0000FF][b]PickledManyToManyField[/b][/color](Field):
    [color=#008000][b]def[/b][/color] [color=#0000FF]__init__[/color]([color=#008000]self[/color], to, to_field[color=#666666]=[/color][color=#008000]None[/color], [color=#666666]**[/color]kwargs):
        to_field [color=#666666]=[/color] to_field [color=#AA22FF][b]or[/b][/color] to[color=#666666].[/color]_meta[color=#666666].[/color]pk[color=#666666].[/color]name
        kwargs[[color=#BA2121]'verbose_name'[/color]] [color=#666666]=[/color] kwargs[color=#666666].[/color]get([color=#BA2121]'verbose_name'[/color], [color=#008000]None[/color])
        [color=#008000]self[/color][color=#666666].[/color]my_rel [color=#666666]=[/color] PickledManyToManyRel(to, to_field,
            num_in_admin[color=#666666]=[/color]kwargs[color=#666666].[/color]pop([color=#BA2121]'num_in_admin'[/color], [color=#666666]0[/color]),
            filter_interface[color=#666666]=[/color]kwargs[color=#666666].[/color]pop([color=#BA2121]'filter_interface'[/color], [color=#008000]None[/color]),
            limit_choices_to[color=#666666]=[/color]kwargs[color=#666666].[/color]pop([color=#BA2121]'limit_choices_to'[/color], [color=#008000]None[/color]),
            raw_id_admin[color=#666666]=[/color]kwargs[color=#666666].[/color]pop([color=#BA2121]'raw_id_admin'[/color], [color=#008000]False[/color]))
        [color=#008000][b]if[/b][/color] [color=#008000]self[/color][color=#666666].[/color]my_rel[color=#666666].[/color]raw_id_admin:
            kwargs[color=#666666].[/color]setdefault([color=#BA2121]'validator_list'[/color], [])[color=#666666].[/color]append([color=#008000]self[/color][color=#666666].[/color]isValidIDList)
        [color=#008000]super[/color](PickledManyToManyField, [color=#008000]self[/color])[color=#666666].[/color]__init__([color=#666666]**[/color]kwargs)

[color=#008000][b]if[/b][/color] [color=#008000]self[/color][color=#666666].[/color]my_rel[color=#666666].[/color]raw_id_admin:
            msg [color=#666666]=[/color] ugettext_lazy([color=#BA2121]'Separate multiple IDs with commas.'[/color])
        [color=#008000][b]else[/b][/color]:
            msg [color=#666666]=[/color] ugettext_lazy([color=#BA2121]'Hold down "Control", or "Command" on a Mac, to select more than one.'[/color])
        [color=#008000]self[/color][color=#666666].[/color]help_text [color=#666666]=[/color] string_concat([color=#008000]self[/color][color=#666666].[/color]help_text, [color=#BA2121]' '[/color], msg)

[color=#008000][b]def[/b][/color] [color=#0000FF]get_attname[/color]([color=#008000]self[/color]):
        [color=#008000][b]return[/b][/color] [color=#BA2121]'[/color][color=#BB6688][b]%s[/b][/color][color=#BA2121]_[/color][color=#BB6688][b]%s[/b][/color][color=#BA2121]s'[/color] [color=#666666]%[/color] ([color=#008000]self[/color][color=#666666].[/color]name, [color=#008000]self[/color][color=#666666].[/color]my_rel[color=#666666].[/color]to[color=#666666].[/color]_meta[color=#666666].[/color]pk[color=#666666].[/color]name)

[color=#008000][b]def[/b][/color] [color=#0000FF]set_attributes_from_rel[/color]([color=#008000]self[/color]):
        [color=#008000]self[/color][color=#666666].[/color]name [color=#666666]=[/color] [color=#008000]self[/color][color=#666666].[/color]name [color=#AA22FF][b]or[/b][/color] [color=#008000]self[/color][color=#666666].[/color]get_attname()
        [color=#008000]self[/color][color=#666666].[/color]verbose_name [color=#666666]=[/color] [color=#008000]self[/color][color=#666666].[/color]verbose_name [color=#AA22FF][b]or[/b][/color] [color=#008000]self[/color][color=#666666].[/color]my_rel[color=#666666].[/color]to[color=#666666].[/color]_meta[color=#666666].[/color]verbose_name
        [color=#008000]self[/color][color=#666666].[/color]my_rel[color=#666666].[/color]field_name [color=#666666]=[/color] [color=#008000]self[/color][color=#666666].[/color]my_rel[color=#666666].[/color]field_name [color=#AA22FF][b]or[/b][/color] [color=#008000]self[/color][color=#666666].[/color]my_rel[color=#666666].[/color]to[color=#666666].[/color]_meta[color=#666666].[/color]pk[color=#666666].[/color]name

[color=#008000][b]def[/b][/color] [color=#0000FF]contribute_to_class[/color]([color=#008000]self[/color], cls, name):
        [color=#008000]super[/color](PickledManyToManyField, [color=#008000]self[/color])[color=#666666].[/color]contribute_to_class(cls, name)
        [color=#008000]self[/color][color=#666666].[/color]set_attributes_from_rel()
        [color=#008000]self[/color][color=#666666].[/color]related_query_name [color=#666666]=[/color] [color=#008000][b]lambda[/b][/color] [color=#008000]self[/color]: opts[color=#666666].[/color]object_name[color=#666666].[/color]lower()
        [color=#008000]setattr[/color](cls, [color=#008000]self[/color][color=#666666].[/color]name, PickledManyRelatedObjectDescriptor([color=#008000]self[/color]))
        standard_init [color=#666666]=[/color] cls[color=#666666].[/color]__init__
        [color=#008000][b]def[/b][/color] [color=#0000FF]unpickling_init[/color](slf, [color=#666666]*[/color]args, [color=#666666]**[/color]kwargs):
            standard_init(slf, [color=#666666]*[/color]args, [color=#666666]**[/color]kwargs)
            value [color=#666666]=[/color] [color=#008000]getattr[/color](slf, [color=#008000]self[/color][color=#666666].[/color]attname)
            [color=#008000][b]if[/b][/color] [color=#AA22FF][b]not[/b][/color] [color=#008000]isinstance[/color](value, set):
                value [color=#666666]=[/color] pickle[color=#666666].[/color]loads(value)
                [color=#008000]setattr[/color](slf, [color=#008000]self[/color][color=#666666].[/color]attname, value)
        cls[color=#666666].[/color]__init__ [color=#666666]=[/color] unpickling_init

[color=#008000][b]def[/b][/color] [color=#0000FF]db_type[/color]([color=#008000]self[/color]):
        [color=#008000][b]return[/b][/color] [color=#BA2121]'text'[/color]

[color=#008000][b]def[/b][/color] [color=#0000FF]to_python[/color]([color=#008000]self[/color], value):
        [color=#008000][b]return[/b][/color] pickle[color=#666666].[/color]loads(value)

[color=#008000][b]def[/b][/color] [color=#0000FF]get_db_prep_save[/color]([color=#008000]self[/color], value):
        [color=#008000][b]return[/b][/color] pickle[color=#666666].[/color]dumps(value)

[color=#408080][i]###############################################[/i][/color]
    [color=#408080][i]# this is just copy-pasted from ManyToManyField[/i][/color]
    [color=#008000][b]def[/b][/color] [color=#0000FF]get_manipulator_field_objs[/color]([color=#008000]self[/color]):
        [color=#008000][b]from[/b][/color] [color=#0000FF][b]django[/b][/color] [color=#008000][b]import[/b][/color] oldforms
        [color=#008000][b]if[/b][/color] [color=#008000]self[/color][color=#666666].[/color]my_rel[color=#666666].[/color]raw_id_admin:
            [color=#008000][b]return[/b][/color] [oldforms[color=#666666].[/color]RawIdAdminField]
        [color=#008000][b]else[/b][/color]:
            choices [color=#666666]=[/color] [color=#008000]self[/color][color=#666666].[/color]get_choices_default()
            [color=#008000][b]return[/b][/color] [curry(oldforms[color=#666666].[/color]SelectMultipleField,
                          size[color=#666666]=[/color][color=#008000]min[/color]([color=#008000]max[/color]([color=#008000]len[/color](choices), [color=#666666]5[/color]), [color=#666666]15[/color]),
                          choices[color=#666666]=[/color]choices)]

[color=#008000][b]def[/b][/color] [color=#0000FF]get_choices_default[/color]([color=#008000]self[/color]):
        [color=#008000][b]return[/b][/color] [color=#008000]self[/color][color=#666666].[/color]get_choices(include_blank[color=#666666]=[/color][color=#008000]False[/color])

[color=#008000][b]def[/b][/color] [color=#0000FF]get_choices[/color]([color=#008000]self[/color], include_blank[color=#666666]=[/color][color=#008000]True[/color], blank_choice[color=#666666]=[/color]BLANK_CHOICE_DASH):
        [color=#BA2121]"Returns a list of tuples used as SelectField choices for this field."[/color]
        first_choice [color=#666666]=[/color] include_blank [color=#AA22FF][b]and[/b][/color] blank_choice [color=#AA22FF][b]or[/b][/color] []
        [color=#008000][b]if[/b][/color] [color=#008000]self[/color][color=#666666].[/color]choices:
            [color=#008000][b]return[/b][/color] first_choice [color=#666666]+[/color] [color=#008000]list[/color]([color=#008000]self[/color][color=#666666].[/color]choices)
        rel_model [color=#666666]=[/color] [color=#008000]self[/color][color=#666666].[/color]my_rel[color=#666666].[/color]to
        [color=#008000][b]if[/b][/color] [color=#008000]hasattr[/color]([color=#008000]self[/color][color=#666666].[/color]my_rel, [color=#BA2121]'get_related_field'[/color]):
            lst [color=#666666]=[/color] [([color=#008000]getattr[/color](x, [color=#008000]self[/color][color=#666666].[/color]my_rel[color=#666666].[/color]get_related_field()[color=#666666].[/color]attname), smart_unicode(x))
                   [color=#008000][b]for[/b][/color] x [color=#AA22FF][b]in[/b][/color] rel_model[color=#666666].[/color]_default_manager[color=#666666].[/color]complex_filter([color=#008000]self[/color][color=#666666].[/color]my_rel[color=#666666].[/color]limit_choices_to)]
        [color=#008000][b]else[/b][/color]:
            lst [color=#666666]=[/color] [(x[color=#666666].[/color]_get_pk_val(), smart_unicode(x))
                   [color=#008000][b]for[/b][/color] x [color=#AA22FF][b]in[/b][/color] rel_model[color=#666666].[/color]_default_manager[color=#666666].[/color]complex_filter([color=#008000]self[/color][color=#666666].[/color]my_rel[color=#666666].[/color]limit_choices_to)]
        [color=#008000][b]return[/b][/color] first_choice [color=#666666]+[/color] lst

[color=#008000][b]def[/b][/color] [color=#0000FF]isValidIDList[/color]([color=#008000]self[/color], field_data, all_data):
        [color=#BA2121]"Validates that the value is a valid list of foreign keys"[/color]
        mod [color=#666666]=[/color] [color=#008000]self[/color][color=#666666].[/color]my_rel[color=#666666].[/color]to
        [color=#008000][b]try[/b][/color]:
            pks [color=#666666]=[/color] [color=#008000]map[/color]([color=#008000]int[/color], field_data[color=#666666].[/color]split([color=#BA2121]','[/color]))
        [color=#008000][b]except[/b][/color] [color=#D2413A][b]ValueError[/b][/color]:
            [color=#408080][i]# the CommaSeparatedIntegerField validator will catch this error[/i][/color]
            [color=#008000][b]return[/b][/color]
        objects [color=#666666]=[/color] mod[color=#666666].[/color]_default_manager[color=#666666].[/color]in_bulk(pks)
        [color=#008000][b]if[/b][/color] [color=#008000]len[/color](objects) [color=#666666]!=[/color] [color=#008000]len[/color](pks):
            badkeys [color=#666666]=[/color] [k [color=#008000][b]for[/b][/color] k [color=#AA22FF][b]in[/b][/color] pks [color=#008000][b]if[/b][/color] k [color=#AA22FF][b]not[/b][/color] [color=#AA22FF][b]in[/b][/color] objects]
            [color=#008000][b]raise[/b][/color] validators[color=#666666].[/color]ValidationError, ungettext([color=#BA2121]"Please enter valid [/color][color=#BB6688][b]%(self)s[/b][/color][color=#BA2121] IDs. The value [/color][color=#BB6688][b]%(value)r[/b][/color][color=#BA2121] is invalid."[/color],
                    [color=#BA2121]"Please enter valid [/color][color=#BB6688][b]%(self)s[/b][/color][color=#BA2121] IDs. The values [/color][color=#BB6688][b]%(value)r[/b][/color][color=#BA2121] are invalid."[/color], [color=#008000]len[/color](badkeys)) [color=#666666]%[/color] {
                [color=#BA2121]'self'[/color]: [color=#008000]self[/color][color=#666666].[/color]verbose_name,
                [color=#BA2121]'value'[/color]: [color=#008000]len[/color](badkeys) [color=#666666]==[/color] [color=#666666]1[/color] [color=#AA22FF][b]and[/b][/color] badkeys[[color=#666666]0[/color]] [color=#AA22FF][b]or[/b][/color] [color=#008000]tuple[/color](badkeys),
            }

[color=#408080][i]# end of copy-past[/i][/color]
    [color=#408080][i]##################[/i][/color]

[color=#008000][b]class[/b][/color] [color=#0000FF][b]PickledManyRelatedObjectDescriptor[/b][/color]([color=#008000]object[/color]):
    [color=#008000][b]def[/b][/color] [color=#0000FF]__init__[/color]([color=#008000]self[/color], field_with_rel):
        [color=#008000]self[/color][color=#666666].[/color]field [color=#666666]=[/color] field_with_rel

[color=#008000][b]def[/b][/color] [color=#0000FF]__get__[/color]([color=#008000]self[/color], instance, instance_type[color=#666666]=[/color][color=#008000]None[/color]):
        [color=#008000][b]if[/b][/color] instance [color=#AA22FF][b]is[/b][/color] [color=#008000]None[/color]:
            [color=#008000][b]raise[/b][/color] [color=#D2413A][b]AttributeError[/b][/color], [color=#BA2121]"[/color][color=#BB6688][b]%s[/b][/color][color=#BA2121] must be accessed via instance"[/color] [color=#666666]%[/color] [color=#008000]self[/color][color=#666666].[/color]field[color=#666666].[/color]name

[color=#008000]self[/color][color=#666666].[/color]field[color=#666666].[/color]renew_attfield(instance)
        val [color=#666666]=[/color] [color=#008000]getattr[/color](instance, [color=#008000]self[/color][color=#666666].[/color]field[color=#666666].[/color]attname)

rel_model [color=#666666]=[/color] [color=#008000]self[/color][color=#666666].[/color]field[color=#666666].[/color]my_rel[color=#666666].[/color]to
        superclass [color=#666666]=[/color] rel_model[color=#666666].[/color]_default_manager[color=#666666].[/color]__class__
        RelatedManager [color=#666666]=[/color] create_pickled_many_related_manager(superclass)

manager [color=#666666]=[/color] RelatedManager(
            model[color=#666666]=[/color]rel_model,
            core_filters[color=#666666]=[/color]{[color=#BA2121]'[/color][color=#BB6688][b]%s[/b][/color][color=#BA2121]__in'[/color] [color=#666666]%[/color] [color=#008000]self[/color][color=#666666].[/color]field[color=#666666].[/color]my_rel[color=#666666].[/color]field_name: val},
            instance[color=#666666]=[/color]instance,
            attname[color=#666666]=[/color][color=#008000]self[/color][color=#666666].[/color]field[color=#666666].[/color]attname,
            )

[color=#008000][b]return[/b][/color] manager

[color=#008000][b]def[/b][/color] [color=#0000FF]__set__[/color]([color=#008000]self[/color], instance, value):
        [color=#008000][b]if[/b][/color] instance [color=#AA22FF][b]is[/b][/color] [color=#008000]None[/color]:
            [color=#008000][b]raise[/b][/color] [color=#D2413A][b]AttributeError[/b][/color], [color=#BA2121]"[/color][color=#BB6688][b]%s[/b][/color][color=#BA2121] must be accessed via instance"[/color] [color=#666666]%[/color] [color=#008000]self[/color][color=#666666].[/color]_field[color=#666666].[/color]name
        [color=#408080][i]# Set the value of the related field[/i][/color]
        val [color=#666666]=[/color] set()
        [color=#008000][b]for[/b][/color] obj [color=#AA22FF][b]in[/b][/color] value:
            [color=#008000][b]try[/b][/color]:
                val[color=#666666].[/color]add([color=#008000]getattr[/color](obj, [color=#008000]self[/color][color=#666666].[/color]field[color=#666666].[/color]my_rel[color=#666666].[/color]get_related_field()[color=#666666].[/color]attname))
            [color=#008000][b]except[/b][/color] [color=#D2413A][b]AttributeError[/b][/color]:
                [color=#008000][b]pass[/b][/color]
        [color=#008000]setattr[/color](instance, [color=#008000]self[/color][color=#666666].[/color]field[color=#666666].[/color]attname, val)

[color=#408080][i]# Clear the cache, if it exists[/i][/color]
        [color=#008000][b]try[/b][/color]:
            [color=#008000]delattr[/color](instance, [color=#008000]self[/color][color=#666666].[/color]field[color=#666666].[/color]get_cache_name())
        [color=#008000][b]except[/b][/color] [color=#D2413A][b]AttributeError[/b][/color]:
            [color=#008000][b]pass[/b][/color]

[color=#008000][b]class[/b][/color] [color=#0000FF][b]PickledManyToManyRel[/b][/color]([color=#008000]object[/color]):
    [color=#008000][b]def[/b][/color] [color=#0000FF]__init__[/color]([color=#008000]self[/color], to, field_name, num_in_admin[color=#666666]=[/color][color=#666666]0[/color], filter_interface[color=#666666]=[/color][color=#008000]None[/color], limit_choices_to[color=#666666]=[/color][color=#008000]None[/color], raw_id_admin[color=#666666]=[/color][color=#008000]False[/color]):
        [color=#008000]self[/color][color=#666666].[/color]to [color=#666666]=[/color] to
        [color=#008000]self[/color][color=#666666].[/color]field_name [color=#666666]=[/color] field_name
        [color=#008000]self[/color][color=#666666].[/color]num_in_admin [color=#666666]=[/color] num_in_admin
        [color=#008000]self[/color][color=#666666].[/color]filter_interface [color=#666666]=[/color] filter_interface
        [color=#008000][b]if[/b][/color] limit_choices_to [color=#AA22FF][b]is[/b][/color] [color=#008000]None[/color]:
            limit_choices_to [color=#666666]=[/color] {}
        [color=#008000]self[/color][color=#666666].[/color]limit_choices_to [color=#666666]=[/color] limit_choices_to
        [color=#008000]self[/color][color=#666666].[/color]edit_inline [color=#666666]=[/color] [color=#008000]False[/color]
        [color=#008000]self[/color][color=#666666].[/color]raw_id_admin [color=#666666]=[/color] raw_id_admin
        [color=#008000]self[/color][color=#666666].[/color]multiple [color=#666666]=[/color] [color=#008000]True[/color]

[color=#008000]self[/color][color=#666666].[/color]related_name [color=#666666]=[/color] [color=#BA2121]'[/color][color=#BB6688][b]%s[/b][/color][color=#BA2121]_[/color][color=#BB6688][b]%s[/b][/color][color=#BA2121]_set'[/color] [color=#666666]%[/color] (to[color=#666666].[/color]_meta[color=#666666].[/color]pk[color=#666666].[/color]name, field_name)

[color=#008000][b]assert[/b][/color] [color=#AA22FF][b]not[/b][/color] ([color=#008000]self[/color][color=#666666].[/color]raw_id_admin [color=#AA22FF][b]and[/b][/color] [color=#008000]self[/color][color=#666666].[/color]filter_interface), [color=#BA2121]"ManyToManyRels may not use both raw_id_admin and filter_interface"[/color]

[color=#408080][i]# get_related_field = ManyToOneRel.get_related_field[/i][/color]
    [color=#008000][b]def[/b][/color] [color=#0000FF]get_related_field[/color]([color=#008000]self[/color]):
        [color=#BA2121]"Returns the Field in the 'to' object to which this relationship is tied."[/color]
        [color=#008000][b]return[/b][/color] [color=#008000]self[/color][color=#666666].[/color]to[color=#666666].[/color]_meta[color=#666666].[/color]get_field([color=#008000]self[/color][color=#666666].[/color]field_name)

[color=#008000][b]def[/b][/color] [color=#0000FF]create_pickled_many_related_manager[/color](superclass):
    [color=#008000][b]class[/b][/color] [color=#0000FF][b]RelatedManager[/b][/color](superclass):
        [color=#008000][b]def[/b][/color] [color=#0000FF]__init__[/color]([color=#008000]self[/color], model[color=#666666]=[/color][color=#008000]None[/color], core_filters[color=#666666]=[/color][color=#008000]None[/color], instance[color=#666666]=[/color][color=#008000]None[/color], attname[color=#666666]=[/color][color=#008000]None[/color]):
            [color=#008000]super[/color](RelatedManager, [color=#008000]self[/color])[color=#666666].[/color]__init__()
            [color=#008000]self[/color][color=#666666].[/color]model [color=#666666]=[/color] model
            [color=#008000]self[/color][color=#666666].[/color]core_filters [color=#666666]=[/color] core_filters
            [color=#008000]self[/color][color=#666666].[/color]instance [color=#666666]=[/color] instance
            [color=#008000]self[/color][color=#666666].[/color]attname [color=#666666]=[/color] attname

[color=#008000][b]def[/b][/color] [color=#0000FF]get_query_set[/color]([color=#008000]self[/color]):
            [color=#008000][b]return[/b][/color] superclass[color=#666666].[/color]get_query_set([color=#008000]self[/color])[color=#666666].[/color]filter([color=#666666]**[/color]([color=#008000]self[/color][color=#666666].[/color]core_filters))

[color=#008000][b]def[/b][/color] [color=#0000FF]add[/color]([color=#008000]self[/color], [color=#666666]*[/color]objs):
            obj_pks [color=#666666]=[/color] (obj[color=#666666].[/color]pk [color=#008000][b]for[/b][/color] obj [color=#AA22FF][b]in[/b][/color] objs)
            [color=#008000]setattr[/color]([color=#008000]self[/color][color=#666666].[/color]instance, [color=#008000]self[/color][color=#666666].[/color]attname, [color=#008000]getattr[/color]([color=#008000]self[/color][color=#666666].[/color]instance, [color=#008000]self[/color][color=#666666].[/color]attname)[color=#666666].[/color]union(obj_pks))
        add[color=#666666].[/color]alters_data [color=#666666]=[/color] [color=#008000]True[/color]

[color=#008000][b]def[/b][/color] [color=#0000FF]remove[/color]([color=#008000]self[/color], [color=#666666]*[/color]objs):
            obj_pks [color=#666666]=[/color] (obj[color=#666666].[/color]pk [color=#008000][b]for[/b][/color] obj [color=#AA22FF][b]in[/b][/color] objs)
            [color=#008000]setattr[/color]([color=#008000]self[/color][color=#666666].[/color]instance, [color=#008000]self[/color][color=#666666].[/color]attname, [color=#008000]getattr[/color]([color=#008000]self[/color][color=#666666].[/color]instance, [color=#008000]self[/color][color=#666666].[/color]attname)[color=#666666].[/color]difference(obj_pks))
        remove[color=#666666].[/color]alters_data [color=#666666]=[/color] [color=#008000]True[/color]

[color=#008000][b]def[/b][/color] [color=#0000FF]clear[/color]([color=#008000]self[/color]):
            [color=#008000]setattr[/color]([color=#008000]self[/color][color=#666666].[/color]instance, [color=#008000]self[/color][color=#666666].[/color]attname, set())
        clear[color=#666666].[/color]alters_data [color=#666666]=[/color] [color=#008000]True[/color]

[color=#008000][b]def[/b][/color] [color=#0000FF]create[/color]([color=#008000]self[/color], [color=#666666]**[/color]kwargs):
            new_obj [color=#666666]=[/color] [color=#008000]self[/color][color=#666666].[/color]model([color=#666666]**[/color]kwargs)
            new_obj[color=#666666].[/color]save()
            [color=#008000]self[/color][color=#666666].[/color]add(new_obj)
            [color=#008000][b]return[/b][/color] new_obj
        create[color=#666666].[/color]alters_data [color=#666666]=[/color] [color=#008000]True[/color]
    [color=#008000][b]return[/b][/color] RelatedManager

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