# Deployment Guide for Filamenteka

## Important: API Update Required

The production API at api.filamenteka.rs needs to be updated with the latest code changes.

### Changes that need to be deployed:

1. **Database Schema Changes**:
   - Column renamed from `vakum` to `spulna` 
   - Column `otvoreno` has been removed
   - Data types changed from strings to integers for `refill` and `spulna`
   - Added CHECK constraint: `kolicina = refill + spulna`

2. **API Server Changes**:
   - Updated `/api/filaments` endpoints to use new column names
   - Updated data type handling (integers instead of strings)
   - Added proper quantity calculation

### Deployment Steps:

1. **Update the API server code**:
   ```bash
   # On the production server
   cd /path/to/api
   git pull origin main
   npm install
   ```

2. **Run database migrations**:
   ```bash
   # Run the migration to rename columns
   psql $DATABASE_URL < database/migrations/003_rename_vakum_to_spulna.sql
   
   # Run the migration to fix data types
   psql $DATABASE_URL < database/migrations/004_fix_inventory_data_types.sql
   
   # Fix any data inconsistencies
   psql $DATABASE_URL < database/migrations/fix_quantity_consistency.sql
   ```

3. **Restart the API server**:
   ```bash
   # Restart the service
   pm2 restart filamenteka-api
   # or
   systemctl restart filamenteka-api
   ```

### Temporary Frontend Compatibility

The frontend has been updated to handle both old and new API response formats, so it will work with both:
- Old format: `vakum`, `otvoreno` (strings)
- New format: `spulna` (integer), no `otvoreno` field

Once the API is updated, the compatibility layer can be removed.

### Verification

After deployment, verify:
1. API returns `spulna` instead of `vakum`
2. Values are integers, not strings
3. Quantity calculations are correct (`kolicina = refill + spulna`)