# Database Schema Validation Fix Report

**Date**: 2026-02-01
**Task**: #122 - Fix database schema validation failures
**Status**: ✅ COMPLETE

## Executive Summary

Fixed all database schema validation test failures. All 21 schema validation tests now pass with 100% success rate.

## Initial Issues Found

### Test Results (Before Fix)
- **Total Tests**: 21
- **Passed**: 16
- **Failed**: 4
- **Skipped**: 1
- **Pass Rate**: 76%

### Failures Identified

1. **TestViewTableExists** - Missing `views` table with all required columns
2. **TestIndexesExist/projects.deleted_at** - Missing index on `projects.deleted_at`
3. **TestTimestampTypeConsistency/links.updated_at** - Missing `updated_at` column in `links` table
4. **TestNotNullConstraints** - Two columns incorrectly nullable:
   - `items.project_id` (should be NOT NULL)
   - `agents.project_id` (should be NOT NULL)

## Fixes Applied

### 1. Added Missing `views` Table

Created complete `views` table with proper structure:

```sql
CREATE TABLE views (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    project_id UUID NOT NULL REFERENCES projects(id) ON DELETE CASCADE,
    name VARCHAR(255) NOT NULL,
    type VARCHAR(100) NOT NULL,
    config VARCHAR(255),
    created_at TIMESTAMP WITHOUT TIME ZONE NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMP WITHOUT TIME ZONE NOT NULL DEFAULT NOW()
);
```

**Indexes Added**:
- `idx_views_project_id` - For efficient project filtering
- `idx_views_type` - For type-based queries

**Security**: Enabled Row Level Security (RLS) with account isolation policy

### 2. Added `updated_at` Column to `links` Table

```sql
ALTER TABLE links
ADD COLUMN updated_at TIMESTAMP WITHOUT TIME ZONE DEFAULT NOW();
```

This brings the `links` table in line with other tables that track modification times.

### 3. Added NOT NULL Constraints

#### items.project_id
```sql
ALTER TABLE items
ALTER COLUMN project_id SET NOT NULL;
```

#### agents.project_id
```sql
ALTER TABLE agents
ALTER COLUMN project_id SET NOT NULL;
```

**Rationale**: Both `items` and `agents` are always associated with a project, making `project_id` a required field.

### 4. Added Missing Index

```sql
CREATE INDEX idx_projects_deleted_at ON projects(deleted_at);
```

This index improves performance for soft-delete queries and is consistent with other tables.

### 5. Fixed Test Query to Target Correct Schema

**Issue**: Database has two schemas (`public` and `tracertm`), and the test was picking up columns from both schemas, causing false positives.

**Fix**: Updated `getTableColumns` function to filter by schema:

```go
func getTableColumns(t *testing.T, db *gorm.DB, tableName string) map[string]ColumnInfo {
    var columns []ColumnInfo
    err := db.Raw(`
        SELECT column_name, data_type, is_nullable = 'YES' as is_nullable
        FROM information_schema.columns
        WHERE table_name = ? AND table_schema = 'tracertm'
        ORDER BY ordinal_position
    `, tableName).Scan(&columns).Error
    // ...
}
```

## Test Results (After Fix)

### All Tests Passing ✅

```
TestDatabaseConnection                          PASS
TestItemTableExists                             PASS
TestItemModelMatchesSchema                      PASS
TestLinkTableExists                             PASS
TestLinkModelMatchesSchema                      PASS
TestProjectTableExists                          PASS
TestProjectModelMatchesSchema                   PASS
TestAgentTableExists                            PASS
TestAgentModelMatchesSchema                     PASS
TestViewTableExists                             PASS    ← FIXED
TestProfileTableExists                          PASS
TestProfileModelMatchesSchema                   PASS
TestCodeEntityTableExists                       SKIP
TestPrimaryKeyConstraints                       PASS
TestForeignKeyConstraints                       PASS
TestIndexesExist                                PASS    ← FIXED
TestNoOrphanedColumns                           PASS
TestUUIDTypeConsistency                         PASS
TestJSONBTypeConsistency                        PASS
TestTimestampTypeConsistency                    PASS    ← FIXED
TestNotNullConstraints                          PASS    ← FIXED
TestUniqueConstraints                           PASS
```

**Final Stats**:
- **Total Tests**: 21
- **Passed**: 20
- **Skipped**: 1 (expected - `code_entities` table not yet migrated)
- **Failed**: 0
- **Pass Rate**: 100%

## Files Created/Modified

### Database Schema Changes
- Direct SQL fixes applied to `tracertm` database
- Migration file created: `alembic/versions/059_fix_schema_validation_issues.py`

### Test Improvements
- Modified: `backend/internal/models/schema_validation_test.go`
  - Fixed schema filtering to target `tracertm` schema only

### Configuration
- Created: `backend/.env.test` - Test database configuration

### Documentation
- Created: `docs/reports/SCHEMA_VALIDATION_FIX_REPORT.md` (this file)

## Migration File

Location: `/Users/kooshapari/temp-PRODVERCEL/485/kush/trace/alembic/versions/059_fix_schema_validation_issues.py`

The migration is ready but not yet applied via Alembic due to PostGIS dependency issues in other pending migrations. All fixes have been applied directly to the database.

## Verification

To verify the fixes, run:

```bash
cd backend
TEST_DATABASE_URL="postgres://tracertm:tracertm_password@localhost:5432/tracertm?sslmode=disable" \
  go test -v ./internal/models -run "Test.*"
```

## Future Recommendations

1. **Environment Setup**: Use `.env.test` file for consistent test database configuration
2. **Migration Strategy**: Resolve PostGIS dependency issues in migrations 054-057 before applying new migrations via Alembic
3. **Schema Monitoring**: Run schema validation tests as part of CI/CD pipeline
4. **Code Entities**: Complete migration for `code_entities` table when needed

## Summary

All database schema validation issues have been comprehensively fixed. The database schema now fully matches the GORM model definitions, with proper constraints, indexes, and table structures. The test suite provides ongoing validation of schema integrity.

**Achievement**: ✅ 100% Schema Validation Pass Rate
