Hapi Migration Toolkit: Safe Legacy→Modern
Stop fearing production breaks during metadata updates. Get the exact audit process, field mappings, validation scripts, and rollback decisions that eliminate costly downtime.
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What's Inside
- Legacy Metadata Inventory Audit Template
- Field-by-Field Migration Mapping Guide
- Pre/Post Migration SQL Validation Scripts
- Common Breaking Changes & How to Fix Them
- Rollback Decision Tree
Pre-migration validation (run on legacy system): ```sql SELECT COUNT(*) as total_records FROM users; SELECT COUNT(*) as null_count FROM users WHERE metadata IS NULL OR metadata = ''; SELECT DISTINCT data_type FROM information_schema.columns WHERE table_name = 'users'; SELECT COUNT(*) FROM users WHERE created_at > NOW() - INTERVAL '24 hours'; ``` These establish baselines. You need exact counts to detect data loss. --- Rollback Decision Tree: Is the system completely down? (No API requests succeeding)
- YES: Rollback immediately. Recovery time < 5 minutes with prepared rollback script.
- NO: Continue assessment. Can you identify the exact cause within 10 minutes?
- YES: Proceed to next decision.
- NO: Rollback now. Unknown failures are dangerous.
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