Search_fields in django python

Question

I was wondering how I am able to use a foreign key to preform a search for example

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 = models.ForeignKey(ProductLot)
     comment_user = models.ForeignKey(User, null=True)
     comment_text = models.TextField()
     created_date = models.DateField(auto_now_add=True)

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

than in my admin.py file I have

from CMS.Inventory.models import Product

class padmin(admin.ModelAdmin):
    search_fields=['name', 'description', 'code', 'lot_no' ]
admin.site.register(Product, padmin)

but I want for 'LotComments' to be able to use the same search fields that 'Product' can as for code ect.

Hope I explained this well

Answer 1

You can specify related field searches in the admin search_fields the same way you do on Django querysets. For the LotComments object, the search_fields would look something like:

search_fields = ['product_lot__product__name', 
                 'product_lot__product__description', 
                 'product_lot__product__code',
                 'product_lot__lot_no']