Description: A signal receiver in a software framework is a function that is triggered in response to a specific signal sent within the system. Signals are a way to allow different parts of an application to communicate with each other without being directly coupled. This means that one component can send a signal, and any number of receivers can listen and react to that signal. Signal receivers are particularly useful for handling events such as the creation or modification of objects in a database, allowing for additional actions to be performed automatically, such as updating indexes, sending notifications, or executing background tasks. In many frameworks, signals are defined using a signal system, which often includes predefined signals like `post_save` and `pre_delete`, among others. Receivers are registered for these signals and are executed when the corresponding signal is emitted. This signal-based architecture promotes a cleaner and more modular design, making it easier to extend and maintain the code over time.
