小编Jon*_*Jon的帖子

我想知道我如何能够使用外键来执行搜索

class Product(models.Model):
    name = models.CharField(max_length = 127)
    description = models.TextField()
    code = models.CharField(max_length = 127)

    def __unicode__(self):
        return self.name + " - " + self.code

class ProductLot(models.Model):
    product = models.ForeignKey(Product)
    code = models.CharField(max_length = 30)
    lot_no = models.CharField(max_length = 30)
    location = models.CharField(max_length = 127)
    incoming = models.IntegerField()
    commited = models.IntegerField()
    available = models.IntegerField()
    reorder = models.IntegerField()
    created_date = models.DateField(auto_now_add=True)

    def __unicode__(self):
        return self.code + " - " + self.product.name + " - " + self.lot_no

class LotComment(models.Model):
     product_lot …