[P1] TEXT[] Array Scanning Error (Template Tags)

[JoshuaAFerguson]

Severity: P1 - HIGH
Component: Database - Template Repository Sync
Report: BUG_REPORT_P1_DATABASE_SCHEMA_CLUSTER_ID.md (mentioned as fixed in commit 1249904)

Issue

Cannot scan PostgreSQL TEXT[] columns without pq.Array() wrapper.

Error:

sql: Scan error on column index X, name "tags": 
unsupported Scan, storing driver.Value type []uint8 into type *[]string

Impact

• Template sync fails
• Cannot read template tags from database
• Template catalog incomplete

Root Cause

Go's sql.Scan doesn't automatically handle PostgreSQL array types. Need github.com/lib/pq wrapper.

Fix Required

import "github.com/lib/pq"

type Template struct {
    ID          int
    Name        string
    Tags        []string  // PostgreSQL TEXT[]
}

// BEFORE (causes error):
err := rows.Scan(&t.ID, &t.Name, &t.Tags)

// AFTER (correct):
err := rows.Scan(&t.ID, &t.Name, pq.Array(&t.Tags))

Status

Report indicates this was FIXED in commit 1249904, but should verify:

1. Fix was properly applied
2. All template tag scans use pq.Array()
3. No other TEXT[] columns have same issue

Files to Check

• Template repository sync code
• Any code reading templates.tags column
• Search for other TEXT[] columns: sessions.tags, applications.tags, etc.

Testing

• Template sync completes successfully
• Template tags display correctly in UI
• No array scanning errors in logs
• All TEXT[] columns use pq.Array()

Effort: 30 minutes (verify fix) or 1-2 hours (apply fix)
Source: .claude/reports/BUG_REPORT_P1_DATABASE_SCHEMA_CLUSTER_ID.md

[JoshuaAFerguson]

✅ Fixed in commit 1249904 - Awaiting Validator Verification

Work Completed: All PostgreSQL TEXT[] array scanning properly wrapped with pq.Array().

Files Modified: api/internal/db/templates.go

All Operations Fixed:

• ✅ GetTemplateByName() - Session creation flow (CRITICAL PATH)
• ✅ GetTemplateByID() - Template retrieval
• ✅ ListTemplates() - Template listing
• ✅ ListTemplatesByCategory() - Filtered template listing
• ✅ CreateTemplate() - Template insertion
• ✅ UpdateTemplate() - Template updates

Solution Applied:

// Added import
import "github.com/lib/pq"

// All Scan operations now use pq.Array wrapper
err := rows.Scan(..., pq.Array(&template.Tags), ...)

// All Insert/Update operations also wrapped
db.Exec(query, ..., pq.Array(template.Tags), ...)

Status:

• ✅ Code changes complete
• ✅ Compiles without errors
• ⏳ Awaiting Validator integration testing
• ⏳ Awaiting session creation verification

Next Steps for Validator:

1. Test template sync completion
2. Verify template tags display correctly in UI
3. Check logs for array scanning errors
4. Verify all TEXT[] columns across codebase

Branch: claude/v2-builder
Commit: 1249904

[JoshuaAFerguson]

Closing as fixed. pq.Array() is used wherever tags is read or written — see api/internal/db/sessions.go:105, 137, 174, 582, 607. The TEXT[] scan error pattern is no longer present.