Hello!

As a noob in rails, i am having a problem on how to find a decent and straightforward notifications system for my application.
Being a Api like application (talking with the client is made using JSON / later on XML as well), i have a problem finding a good solution to feed my needs.

I have tried to use the rails validators, but then i have realized that is not a good solution, as i need to send normal notifications as well (Ex: "You have successfully bought this item" ).

After that ideea failed ... I have tried to implement a "Notification" module inside my user model as, all my notifications are user related. However ... this system has 2 instance variables : @notifications and @api_errors. Now, the problem would be the validation of the user action, and here might be several messages to send:

- Stock finished
- No money
- No access to this feature ...
- CC invalid
... etc

now ... i can do my checks like

if false == money_requirement?
self.add_api_error "You do not have enough money"
end

if false == product.stock_requirement?
self.add_api_error ....
end

But the main problem ... would be now, the method of trigger the action.

if self.api_errors.size == 0
# do play with the user account, stocks and other stuff ....
end

what i am asking you: Is there any way to play with those notifications and errors without passing through the database? They are more like flashes, but the code is inside the model ... so, i don't want to fall into an antipattern having session related info inside my model.

Thanks.


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postedMar 11, '12 at 9:14a
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