Sqlx is a pure-Rust SQL client that checks queries at compile time against your database schema. The query! macro connects to your DB during compilation and validates that columns and types match. This catches typos and schema drift before runtime. It

File uploads require careful validation for security. I validate file size using a custom validator and check content type. Using FileField or ImageField, Django handles storage automatically. I configure MEDIA_ROOT and MEDIA_URL for development. For

Observability provides insight into database health and performance. I monitor key metrics—queries per second, connection count, cache hit ratio. Slow query logs identify performance problems. Query latency percentiles show user experience. Lock wait

If you expose an API to the public internet, you need a basic guardrail against bursts. I like a token bucket with rate.NewLimiter because it’s easy to reason about: steady-state rate plus a burst capacity. The middleware checks Allow() and returns 42

Nested routers create hierarchical URL structures for related resources. I use drf-nested-routers to define parent-child relationships in URLs like /posts/1/comments/. This makes APIs more RESTful and intuitive. I filter child resources by parent ID i

A command palette feels like a SPA feature, but you can do it Hotwire-first: place a turbo_frame_tag 'modal' in the layout and load the palette HTML into it. A small Stimulus controller listens for meta+k and navigates the modal frame to /palette. The

Return relations from query objects, not arrays. It keeps composition possible (additional filters, pagination, eager loading) and avoids loading huge result sets accidentally.

Bcrypt is fine, but Argon2 is the modern default with better resistance to GPU attacks. I store the full hash string (it includes parameters + salt) and keep verification in one utility so the rest of the app doesn’t grow its own auth helpers. The imp

Laravel's filesystem abstraction treats local, S3, FTP, and other storage identically. I configure disks in config/filesystems.php with drivers and credentials. The Storage facade provides methods like put(), get(), delete() that work across all disks

Unit tests verify code behavior in isolation using XCTest framework. I create test classes inheriting from XCTestCase with test prefixed methods. Each test has arrange-act-assert structure: set up dependencies, execute code, verify results with XCTAss

The newtype pattern wraps a primitive in a tuple struct to create a distinct type. This prevents mixing up values that are semantically different but have the same underlying type (like UserId(u32) vs PostId(u32)). The compiler enforces that you can't

SwiftUI property wrappers manage state and data flow declaratively. @State creates mutable state owned by a view for simple values. @Binding creates two-way connections to pass state down the hierarchy without ownership. @ObservedObject watches extern