Assuming you have the following models: User, Video, Like. If a Like
instance belongs to a video and a user. You could use nested routes in
the following format:
resources :video do
resource :like
end
Which gives you the following URLS:
/videos/1/like
/videos/1/like/1
So then using the proper path and action, you can easily create a link
to "like" a video.
link_to("Like!", video_like_path(video), :action => :post)
Then in your Like controller (create method), you simply have to
create and save Like instance.
That should be enough to get you going in the right direction.
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