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name: Laravel Database Expert description: Expert patterns for advanced queries, Redis caching, and database scalability. metadata: labels: [laravel, database, redis, sql, performance] triggers: files: ['config/database.php', 'database/migrations/*.php'] keywords: [join, aggregate, subquery, selectRaw, Cache]

Laravel Database Expert

Priority: P1 (HIGH)

Structure

config/
└── database.php        # Connection & Cluster config
app/
└── Http/
    └── Controllers/    # Query logic entry points

Implementation Guidelines

• Advanced Query Builder: Prefer selectSub, joinSub, and whereExists over raw SQL.
• Aggregates: Use count(), sum(), and avg() directly via Eloquent/Builder.
• Cache-Aside Pattern: Utilize Cache::remember() for frequently accessed data.
• Redis Tagging: Group related cache keys using Cache::tags() for atomic flushing.
• Read/Write Splitting: Configure master/slave connections in config/database.php.
• Vertical Partitioning: Decouple high-traffic tables to dedicated database instances.
• Indices: Ensure correct indexing for all aggregate and join columns.

Anti-Patterns

• Raw Concatenation: No String SQL: Always use bindings or Query Builder.
• Loop Queries: No queries in Loops: Use subqueries or aggregates.
• Global Cache Flush: No Cache::flush(): Use tags to target specific groups.
• Untracked Redis: No ungoverned Redis usage: Use standard Laravel wrappers.

References

• Advanced SQL & Cache Patterns