I am using django v1.5. And I mainly use QueryDict to solve the problem:
from django.http import QueryDict
put = QueryDict(request.body)
description = put.get('description')
and in *.coffee
$.ajax
url: "/policy/#{policyId}/description/"
type: "PUT"
data:
description: value
success: (data) ->
alert data.body
fail: (data) ->
alert "fail"
You can go here to find more information. And I hope this can help you. Good luck:)