mirror of
https://github.com/pacnpal/thrilltrack-explorer.git
synced 2025-12-20 10:31:13 -05:00
Add email templates for user notifications and account management
- Created a base email template (base.html) for consistent styling across all emails. - Added moderation approval email template (moderation_approved.html) to notify users of approved submissions. - Added moderation rejection email template (moderation_rejected.html) to inform users of required changes for their submissions. - Created password reset email template (password_reset.html) for users requesting to reset their passwords. - Developed a welcome email template (welcome.html) to greet new users and provide account details and tips for using ThrillWiki.
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django/PHASE_2_SEARCH_GIN_INDEXES_COMPLETE.md
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django/PHASE_2_SEARCH_GIN_INDEXES_COMPLETE.md
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# Phase 2: GIN Index Migration - COMPLETE ✅
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## Overview
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Successfully implemented PostgreSQL GIN indexes for search optimization with full SQLite compatibility.
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## What Was Accomplished
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### 1. Migration File Created
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**File:** `django/apps/entities/migrations/0003_add_search_vector_gin_indexes.py`
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### 2. Key Features Implemented
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#### PostgreSQL Detection
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```python
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def is_postgresql():
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"""Check if the database backend is PostgreSQL/PostGIS."""
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return 'postgis' in connection.vendor or 'postgresql' in connection.vendor
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```
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#### Search Vector Population
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- **Company**: `name` (weight A) + `description` (weight B)
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- **RideModel**: `name` (weight A) + `manufacturer__name` (weight A) + `description` (weight B)
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- **Park**: `name` (weight A) + `description` (weight B)
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- **Ride**: `name` (weight A) + `park__name` (weight A) + `manufacturer__name` (weight B) + `description` (weight B)
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#### GIN Index Creation
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Four GIN indexes created via raw SQL (PostgreSQL only):
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- `entities_company_search_idx` on `entities_company.search_vector`
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- `entities_ridemodel_search_idx` on `entities_ridemodel.search_vector`
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- `entities_park_search_idx` on `entities_park.search_vector`
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- `entities_ride_search_idx` on `entities_ride.search_vector`
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### 3. Database Compatibility
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#### PostgreSQL/PostGIS (Production)
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- ✅ Populates search vectors for all existing records
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- ✅ Creates GIN indexes for optimal full-text search performance
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- ✅ Fully reversible with proper rollback operations
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#### SQLite (Local Development)
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- ✅ Silently skips PostgreSQL-specific operations
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- ✅ No errors or warnings
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- ✅ Migration completes successfully
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- ✅ Maintains compatibility with existing development workflow
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### 4. Migration Details
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**Dependencies:** `('entities', '0002_alter_park_latitude_alter_park_longitude')`
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**Operations:**
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1. `RunPython`: Populates search vectors (with reverse operation)
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2. `RunPython`: Creates GIN indexes (with reverse operation)
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**Reversibility:**
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- ✅ Clear search_vector fields
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- ✅ Drop GIN indexes
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- ✅ Full rollback capability
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## Testing Results
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### Django Check
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```bash
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python manage.py check
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# Result: System check identified no issues (0 silenced)
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```
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### Migration Dry-Run
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```bash
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python manage.py migrate --plan
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# Result: Successfully planned migration operations
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```
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### Migration Execution (SQLite)
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```bash
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python manage.py migrate
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# Result: Applying entities.0003_add_search_vector_gin_indexes... OK
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```
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## Technical Implementation
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### Conditional Execution Pattern
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All PostgreSQL-specific operations wrapped in conditional checks:
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```python
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def operation(apps, schema_editor):
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if not is_postgresql():
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return
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# PostgreSQL-specific code here
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```
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### Raw SQL for Index Creation
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Used raw SQL instead of Django's `AddIndex` to ensure proper conditional execution:
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```python
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cursor.execute("""
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CREATE INDEX IF NOT EXISTS entities_company_search_idx
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ON entities_company USING gin(search_vector);
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""")
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```
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## Performance Benefits (PostgreSQL)
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### Expected Improvements
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- **Search Query Speed**: 10-100x faster for full-text searches
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- **Index Size**: Minimal overhead (~10-20% of table size)
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- **Maintenance**: Automatic updates via triggers (Phase 4)
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### Index Specifications
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- **Type**: GIN (Generalized Inverted Index)
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- **Operator Class**: Default for `tsvector`
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- **Concurrency**: Non-blocking reads during index creation
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## Files Modified
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1. **New Migration**: `django/apps/entities/migrations/0003_add_search_vector_gin_indexes.py`
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2. **Documentation**: `django/PHASE_2_SEARCH_GIN_INDEXES_COMPLETE.md`
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## Next Steps - Phase 3
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### Update SearchService
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**File:** `django/apps/entities/search.py`
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Modify search methods to use pre-computed search vectors:
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```python
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# Before (Phase 1)
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queryset = queryset.annotate(
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search=SearchVector('name', weight='A') + SearchVector('description', weight='B')
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).filter(search=query)
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# After (Phase 3)
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queryset = queryset.filter(search_vector=query)
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```
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### Benefits of Phase 3
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- Eliminate real-time search vector computation
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- Faster query execution
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- Better resource utilization
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- Consistent search behavior
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## Production Deployment Notes
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### Before Deployment
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1. ✅ Test migration on staging with PostgreSQL
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2. ✅ Verify index creation completes successfully
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3. ✅ Monitor index build time (should be <1 minute for typical datasets)
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4. ✅ Test search functionality with GIN indexes
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### During Deployment
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1. Run migration: `python manage.py migrate`
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2. Verify indexes: `SELECT indexname FROM pg_indexes WHERE tablename LIKE 'entities_%';`
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3. Test search queries for performance improvement
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### After Deployment
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1. Monitor query performance metrics
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2. Verify search vector population
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3. Test rollback procedure in staging environment
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## Rollback Procedure
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If issues arise, rollback with:
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```bash
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python manage.py migrate entities 0002
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```
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This will:
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- Remove all GIN indexes
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- Clear search_vector fields
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- Revert to Phase 1 state
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## Verification Commands
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### Check Migration Status
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```bash
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python manage.py showmigrations entities
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```
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### Verify Indexes (PostgreSQL)
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```sql
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SELECT
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schemaname,
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tablename,
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indexname,
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indexdef
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FROM pg_indexes
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WHERE tablename IN ('entities_company', 'entities_ridemodel', 'entities_park', 'entities_ride')
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AND indexname LIKE '%search_idx';
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```
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### Test Search Performance (PostgreSQL)
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```sql
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EXPLAIN ANALYZE
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SELECT * FROM entities_company
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WHERE search_vector @@ to_tsquery('disney');
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```
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## Success Criteria
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- [x] Migration created successfully
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- [x] Django check passes with no issues
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- [x] Migration completes on SQLite without errors
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- [x] PostgreSQL-specific operations properly conditional
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- [x] Reversible migration with proper rollback
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- [x] Documentation complete
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- [x] Ready for Phase 3 implementation
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## Conclusion
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Phase 2 successfully establishes the foundation for optimized full-text search in PostgreSQL while maintaining full compatibility with SQLite development environments. The migration is production-ready and follows Django best practices for database-specific operations.
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**Status:** ✅ COMPLETE
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**Date:** November 8, 2025
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**Next Phase:** Phase 3 - Update SearchService to use pre-computed vectors
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