python - Addressing a user details when my consumer class has one to one relation with User model -

in application have created consumer class keeps data in django user class , adds other characteristics in fields create me. consumer class connected user in 1 one relationship. able post data.

but need search , retrieve information based on username received in request. not able search consumer class based on username. please advise how achieve this.

my code given below

class consumer(models.model):         user= models.onetoonefield(user)         company=models.charfield(max_length=64)         street1=models.charfield(max_length=64)         street2=models.charfield(max_length=64)         city=models.charfield(max_length=64)         state=models.charfield(max_length=64)         country=models.charfield(max_length=64) 

i trying record below

def user_page(request, username):     consumer=get_object_or_404(consumer, username=username) # locate record 

i following error

cannot resolve keyword 'username' field  

i tried user.username=username well.

avoid using user.username. replace . double underscores __ try instead.

def user_page(request, username):     consumer=get_object_or_404(consumer, user__username=username)