♻️ Refactor: How to fix fragile .replace('/vitto-mind', '/vitto-users') p...

Date: 2026-03-30
Time: 14:34:14 UTC
Session: gspace1-283.6
Agent: backend
Confidence: 97%
Status: ✅ Documented

📋 Decision Context

Question:

How to fix fragile .replace('/vitto-mind', '/vitto-users') pattern in backend-vitto-api MongoDB connection?

Task: S283: Fix fragile Vitto MongoDB connection

🎯 Decision Made

Chosen:

Replace inline Mongoose config with createMongooseConfig() from shared factory, using VITTO_MONGODB_OPTIONS with explicit dbName and connectionStringKey: 'VITTO_MONGODB_URI'. The factory's dbName parameter controls database selection regardless of URI path.

Options Considered:

1. Keep .replace() but add validation
2. Use separate VITTO_USERS_MONGODB_URI env var
3. Use createMongooseConfig() with explicit dbName (chosen)

💭 Reasoning

ROOT CAUSE: backend-vitto-api was the ONLY backend not using the shared createMongooseConfig() factory. It had inline config with .replace('/vitto-mind', '/vitto-users') to derive the second database URI. WHAT BROKE: (1) Silently fails if VITTO_MONGODB_URI doesn't contain '/vitto-mind' — both connections hit same database. (2) Missing production-grade settings — no write concern, no compression, no read preference, no serverApi versioning. (3) Blocks staging — staging cluster URI wouldn't contain '/vitto-mind'. ALTERNATIVES: (1) Keep .replace() but add validation — doesn't solve missing factory settings. (2) Separate VITTO_USERS_MONGODB_URI env var — adds unnecessary config complexity. CHOSEN BECAUSE: Aligns vitto-api with same pattern as backend-api and backend-ai-api. URI path becomes irrelevant. Gets all factory production settings for free. WOULD BE WRONG IF: Vitto needed fundamentally different MongoDB connection settings than other backends (it doesn't). EARLY WARNING: If someone adds a new Vitto database, they should add it to VITTO_MONGODB_OPTIONS in mongodb.factory.ts, not inline it.

📁 Files Involved

• APIs/backend-vitto-api/src/app/app.module.ts
• libs/libs-api/backend-core/src/lib/config/mongodb.factory.ts

🔗 Related

• Decision ID: dev_1774881254586_j6gem2h
• Session: 283
• Workspace: gspace1

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