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Yaojia Wang 599c1aedc6 docs(backend): Mark Sprint 2 Story 1 Task 1 as completed

Task: Design AuditLog Database Schema and Create Migration

Deliverables:
- AuditLog entity with multi-tenant support
- EF Core configuration with JSONB columns
- Database migration with composite indexes
- Multi-tenant query filter

Status: completed (actual: 2 hours, estimated: 4 hours)
All acceptance criteria met.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

2025-11-04 23:10:51 +01:00

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task_id, story, status, estimated_hours, actual_hours, created_date, start_date, completion_date, assignee

task_id	story	status	estimated_hours	actual_hours	created_date	start_date	completion_date	assignee
sprint_2_story_1_task_1	sprint_2_story_1	completed	4	2	2025-11-05	2025-11-05	2025-11-05	Backend Team

Task 1: Design AuditLog Database Schema and Create Migration

Story: Story 1 - Audit Log Foundation (Phase 1) Estimated: 4 hours

Description

Design and implement the AuditLog database table schema with proper columns, data types, and indexes to support efficient audit querying and multi-tenant isolation.

Acceptance Criteria

Database migration created with AuditLog table
All required columns defined with correct data types
Composite indexes created for query optimization
Multi-tenant isolation enforced (TenantId column)
Migration applied successfully

Implementation Details

Table Schema:

CREATE TABLE AuditLogs (
    Id UUID PRIMARY KEY,
    TenantId UUID NOT NULL,
    EntityType VARCHAR(100) NOT NULL,
    EntityId UUID NOT NULL,
    Action VARCHAR(20) NOT NULL, -- 'Create', 'Update', 'Delete'
    UserId UUID NULL,
    Timestamp TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    OldValues JSONB NULL,
    NewValues JSONB NULL,

    CONSTRAINT FK_AuditLogs_Tenants FOREIGN KEY (TenantId) REFERENCES Tenants(Id) ON DELETE CASCADE
);

-- Indexes for query performance
CREATE INDEX IX_AuditLogs_TenantId_EntityType_EntityId ON AuditLogs(TenantId, EntityType, EntityId);
CREATE INDEX IX_AuditLogs_Timestamp ON AuditLogs(Timestamp DESC);
CREATE INDEX IX_AuditLogs_UserId ON AuditLogs(UserId);

Files to Modify:

Create: colaflow-api/src/ColaFlow.Infrastructure/Data/Migrations/{timestamp}_AddAuditLogTable.cs

Technical Notes

Use PostgreSQL JSONB for OldValues/NewValues (flexible schema, indexed queries)
Composite index on (TenantId, EntityType, EntityId) for efficient entity history queries
Timestamp index with DESC order for recent logs queries
Consider table partitioning for future scalability (Phase 4)

Testing

Verify migration runs without errors
Check indexes are created
Verify foreign key constraints work

Created: 2025-11-05 by Backend Agent

2.1 KiB Raw Blame History