Filtering by the properties of a model that has us in an m2m

gistfile1.py

from django.contrib.admin import SimpleListFilter
from store.models import Box

class Items(Model):
    name = CharField(max_length=200)

class Box(Model):
    items = ManyToManyField(Items)
    box_color = CharField(max_length=200,choices=(
        ('yellow','yellow'),
        ('green','green'),
    )

# So in my Items admin list i want to filter the items by color, this is my 'failed' attemp.

class Items_by_payment_system_filter(SimpleListFilter):
    title = _('Colors')

    # Parameter for the filter that will be used in the URL query.
    parameter_name = 'color'

    def lookups(self, request, model_admin):
        """
        Returns a list of tuples. The first element in each
        tuple is the coded value for the option that will
        appear in the URL query. The second element is the
        human-readable name for the option that will appear
        in the right sidebar.
        """
        return Box.colors
    def queryset(self, request, queryset):
        # Remember that self.value contains the current selection in the filter options displayed to the user in Admin
        boxes = Box.objects.filter(items__in=queryset) # get only boxes with the current set of items
        boxes_ids = boxes.filter(color=self.values()).values_list('items__id',flat=True)
        return queryset.filter(id__in=boxes_ids)