What are Django signals? | Django signals tutorial | Understanding Django signals
In Django, a signal is a mechanism for allowing decoupled applications to get notified when certain actions occur elsewhere in the application. It allows certain senders to notify a set of receivers when some action has taken place. This can be useful for implementing certain types of decoupled and modular functionality.
Django signals are based on the observer pattern, where an object (the sender) maintains a list of dependents (the receivers) that are notified of any state changes, typically by calling one of their methods. In Django, the senders are usually certain events or actions that occur during the processing of a web request or other parts of the application
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