Question

Guys,
Is there an easy way to return different fields names from different models by chaining joins?
My model:

Class Item(models.Model):
    item_code = models.CharField(max_length=10)
    name = models.CharField(max_length=255)
    ...

Class Stock(models.Model):
    item_code = models.ForeignKey( Item )
    userid = models.ForeignKey( User )
    qty = models.IntegerField()
    ...

I want to select ” Item.Item_code, Item.name, Stock.qty where Stock.userid=2 and Item.item_code = Stock.Item_Code”

How do i do this in Django?

Gath

Answer 1

1. First of all change fileds names

2. Read this very carefuly http://docs.djangoproject.com/en/dev/ref/models/querysets/

   Class Item(models.Model):
      item_code = models.CharField(max_length=10)
      name = models.CharField(max_length=255)
      ...
   Class Stock(models.Model):
       item = models.ForeignKey( Item )
       user = models.ForeignKey( User )
       qty = models.IntegerField()
       ...
   
   
   #view 
   stocks = Stock.objects.filter(user=2)
   for stock in stocks:
       print stock.item.item_code, stock.item.name
   #one query version