Initial commit - Church Music Database
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legacy-site/documentation/md-files/MONGODB_MIGRATION_GUIDE.md
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# 🚀 MongoDB Migration Guide
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## Current Status
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✅ **Preparation Complete:**
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- MongoDB connection module created (`mongodb_models.py`)
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- Migration script created (`migrate_to_mongodb.py`)
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- Configuration files created (`.env`, `.env.example`)
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- PyMongo package installed
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## 📋 Two Options for MongoDB Setup
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### Option 1: MongoDB Atlas (RECOMMENDED) ⭐
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**Best for: Cross-device access (PC, mobile, tablet)**
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**Pros:**
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- ✅ Works from anywhere (cloud-hosted)
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- ✅ Free forever (512MB M0 tier)
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- ✅ No installation needed
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- ✅ Automatic backups
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- ✅ Always online (no need to keep PC running)
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- ✅ Secure connections (TLS encryption)
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**Setup Time:** 5-10 minutes
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**Follow:** `MONGODB_ATLAS_SETUP.md` guide
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**Steps Summary:**
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1. Create free account at <https://www.mongodb.com/cloud/atlas/register>
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2. Create M0 FREE cluster (choose AWS, closest region)
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3. Create database user (save password!)
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4. Allow network access (0.0.0.0/0 for all devices)
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5. Get connection string
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6. Update `backend/.env` with connection string
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7. Run migration
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---
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### Option 2: Local MongoDB (PC Only)
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**Best for: Testing locally, no internet needed**
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**Pros:**
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- ✅ Faster (local network)
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- ✅ Full control
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- ✅ No external dependencies
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**Cons:**
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- ❌ Only works on PC (mobile/tablet can't connect when PC is off)
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- ❌ Requires installation
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- ❌ PC must be running for access
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**Setup Time:** 15-20 minutes
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**Installation:**
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1. Download MongoDB Community Server: <https://www.mongodb.com/try/download/community>
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2. Run installer (choose "Complete" installation)
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3. Install as Windows Service (keep defaults)
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4. Verify installation:
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```powershell
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mongod --version
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```
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5. Keep default `.env` settings (already configured for localhost)
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6. Run migration
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---
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## 🎯 Recommended Path
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**I recommend Option 1 (MongoDB Atlas)** because:
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1. Your goal is "access across all platforms (PC, mobile, tablet)"
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2. Cloud database works from anywhere
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3. Free tier is perfect for this app size
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4. No maintenance needed
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5. Professional-grade hosting
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## 📝 After You Choose
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**Once you have MongoDB ready:**
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### If MongoDB Atlas
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```powershell
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# 1. Edit backend/.env with your Atlas connection string
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code backend\.env
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# 2. Run migration
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cd backend
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.\venv\Scripts\python.exe migrate_to_mongodb.py
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# 3. Verify data
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# Check MongoDB Atlas dashboard → Browse Collections
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```
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### If Local MongoDB
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```powershell
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# 1. Verify MongoDB is running
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Get-Service MongoDB
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# 2. Run migration (uses localhost by default)
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cd backend
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.\venv\Scripts\python.exe migrate_to_mongodb.py
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# 3. Verify data
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# Use MongoDB Compass (free GUI) or mongo shell
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```
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## ⚡ Migration Will
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1. ✅ Connect to MongoDB (Atlas or local)
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2. ✅ Create collections with indexes
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3. ✅ Copy all 39 songs from SQLite
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4. ✅ Copy all 5 profiles from SQLite
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5. ✅ Copy all 5 profile-song links from SQLite
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6. ✅ Copy all 0 plans from SQLite
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7. ✅ Verify all data migrated correctly
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8. ✅ Show detailed migration report
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**Migration is safe:**
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- ✅ Does NOT delete SQLite data
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- ✅ Does NOT modify existing files
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- ✅ Skips duplicate records
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- ✅ Can be run multiple times safely
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## 🔄 Next Steps After Migration
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Once migration succeeds, I'll:
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1. Update `app.py` to use MongoDB instead of SQLite
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2. Test all API endpoints
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3. Verify frontend works with MongoDB
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4. Clean up old SQLite code and files
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5. Update documentation
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## ❓ Questions?
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**"Which should I choose?"**
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→ MongoDB Atlas if you want mobile/tablet access
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→ Local MongoDB only if PC-only is fine
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**"Is it safe?"**
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→ Yes! Your SQLite data stays unchanged. Migration only reads from it.
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**"Can I switch later?"**
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→ Yes! You can run migration again to different MongoDB instance.
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**"What if migration fails?"**
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→ Your original data is safe. We'll troubleshoot and try again.
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## 🎬 Ready to Start?
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**Tell me which option you prefer, and I'll guide you through the specific steps!**
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**Option 1: MongoDB Atlas (cloud - recommended)**
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**Option 2: Local MongoDB (PC only)**
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Or if you have questions, ask away! 🚀
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