How to get multiple entries for ManyToMany relations in filter_horizontal Admin

[Christian Merlau]

Hey,

I am trying to solve following problem and I got stuck. Any help is appreciated...

I have two models which represent a product and its parts.

class Product(models.Model):
 name = models.CharField(max_length=200)
 average_daily = models.FloatField(default=0)
 average_monthly = models.IntegerField(default=0)
 prodparts = models.ManyToManyField('OrderItem')

class OrderItem(models.Model):
 name = models.CharField(max_length=200)
 description = models.CharField(max_length=500)
 delivery_time = models.IntegerField(default=5)
 order_quantity = models.IntegerField(default=100)
 count = models.IntegerField(default=0)

In admin.py my intent was to display the prodparts with filter_horizontal but then I ran into the fact that some Products consist of OrderItems in various ammounts. For example Product1 has two OrderItems "Battery". Would it be a good solution to make prodparts a CharField and populate it from a custom admin form with a list of chosen OrderItems?

Right now I have no clue how to get it done in a proper Django way. Any suggestions?

Thx in advance,

Christian