web methods might be a simpler way to go.
http://cookbook.hobocentral.net/manual/controllers#web_methods
# in controller
web_method :toggle do
@recipe.toggle current_user
redirect_to this
end
# in model
def toggle(user)
if self.users.include? user
# remove user link
else
self.users << user
self.save
end
end
def toggle_permitted?(acting_user)
acting_user.signed_up?
end
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