Event Sourcing in Laravel: Store Every Change, Never Lose Data History

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Traditional Laravel applications using CRUD architecture overwrite existing data on updates, making it impossible to trace historical changes or audit past states. Event Sourcing addresses this by recording every change to a model as an immutable sequence of events, with the current state derived by replaying those events. To avoid performance issues from replaying large event logs, Projections listen for events in real time and maintain fast, read-optimized database tables for queries. If a projection table becomes corrupted, it can be fully rebuilt by replaying the original event log, ensuring data integrity. While the pattern adds architectural complexity, it delivers significant benefits for financial systems, audit-heavy platforms, and enterprise applications that require complete historical traceability.

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