Form validation is essential for web applications to prevent malicious input and maintain data consistency. In Laravel, form validation is handled by the `validate()` method, which checks submitted data against defined rules and returns error messages in a `$validatedData` variable. The article explores how this method works under the hood and provides best practices for using it effectively.
This article demystifies data consistency in distributed systems, outlining strong, weak, eventual, causal, and sequential models and the trade-offs between availability, latency, and guarantees; it advises choosing per requirements and illustrates with an e-commerce microservices workflow using eventual consistency and async queues to reconcile updates.
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