I am using Django and my website has no user profiles so all are anonymous. I want to implement a 'like' system. How do I restrict a user to like only once. Thanks.
If you don't have any way of identifying your users then your best bet is to store this info in a browser cookie or HTML5 local storage . (I don't advise using flash cookies since there is a long debate about them and they are harder to implement)
You can't 100% restrict multiple votes, but you can make it very difficult for a regular user, by using:
Facebook seems to track uniqueness of likes when its tied to a facebook app though the XFBML script. Regardless of whether I'm logged in or logged out of facebook, the like button seems to recognize that I've already voted.
insights
, which can be found here: http://www.facebook.com/insights/ While still in its infancy, there is a project called django-like-button
which provides a wrapper for facebooks XFBML like button. If you're using pip and virtualenv, you can pip install django-like-button
and follow the readme.rst installation instructions. The project can be found on github.
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