# Task Log: E2E PostgreSQL Backend Fixes

## Date: 2025-11-30

## Summary
Fixed multiple issues with the PostgreSQL backend for multi-tenant e2e tests.

## Actions
1. **Fixed tenant creation to insert into PostgreSQL tenants table** (`tenant_service.py`)
   - Added PostgreSQL INSERT for tenants to maintain FK integrity with `user_tenant_memberships`
   - Used `db.query()` method instead of `db.execute()` (which expects dict, not list)

2. **Fixed asyncpg Record access patterns** (`tenant_service.py`)
   - Changed `add_user_to_tenant` to use `multirows=True` to get list of Records
   - Fixed `remove_user_from_tenant` to use `multirows=True`
   - Fixed `update_user_role` to use `multirows=True`
   - Fixed `get_user_tenants` to use `multirows=True` for main query
   - Fixed `get_tenant_members` to use `multirows=True` for main query
   - Fixed count queries to access single Record directly (not as list)

## Decisions
- Use `multirows=True` for queries that return multiple rows (INSERT/UPDATE/DELETE with RETURNING multiple)
- Use default `multirows=False` for single-row results (COUNT, single tenant lookup)
- Access asyncpg Record fields with `record['field']` syntax

## Test Results
- ✅ Multi-Tenant Isolation test PASSED
- Tenants correctly isolated - Tenant A cannot see Tenant B's data and vice versa

## Next Steps
- Run additional e2e tests (deletion, mixed operations)
- Consider running full test suite to validate all backends

## Lessons/Insights
- asyncpg's `query()` with `multirows=False` returns a single Record, not a list
- asyncpg's `query()` with `multirows=True` returns a list of Records
- PostgreSQL FK constraints require the referenced row to exist before inserting
