refactor: implement database-specific schema architecture with schema-as-query pattern
🏗️ **Major Database Schema Refactoring** **Problem Solved**: Eliminated model duplication and multiple sources of truth by: - Removed duplicate models (`internal/models/content.go`) - Replaced inlined schema strings with sqlc-generated setup functions - Implemented database-specific schemas with proper NOT NULL constraints **Key Improvements**: ✅ **Single Source of Truth**: Database schemas define all types, no manual sync needed ✅ **Clean Generated Types**: sqlc generates `string` and `int64` instead of `sql.NullString/sql.NullTime` ✅ **Schema-as-Query Pattern**: Setup functions generated by sqlc for type safety ✅ **Database-Specific Optimization**: SQLite INTEGER timestamps, PostgreSQL BIGINT timestamps ✅ **Cross-Database Compatibility**: Single codebase supports both SQLite and PostgreSQL **Architecture Changes**: - `db/sqlite/` - SQLite-specific schema and setup queries - `db/postgresql/` - PostgreSQL-specific schema and setup queries - `db/queries/` - Cross-database CRUD queries using `sqlc.arg()` syntax - `internal/db/database.go` - Database abstraction with runtime selection - `internal/api/models.go` - Clean API models for requests/responses **Version Control System**: Complete element-level history with user attribution and rollback **Verification**: ✅ Full API workflow tested (create → update → rollback → versions) **Production Ready**: Supports SQLite (development) → PostgreSQL (production) migration
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VERSION-CONTROL-SUMMARY.md
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VERSION-CONTROL-SUMMARY.md
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# Version Control Implementation Summary
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## 🎯 **What We Built**
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A complete version control system for the Insertr CMS with user attribution, rollback functionality, and modern database architecture using sqlc.
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## 🏗️ **Architecture Changes**
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### **Database Layer (sqlc + Modern Schema)**
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- **sqlc Integration**: Type-safe Go database code generated from SQL
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- **Clean Schema**: `content` + `content_versions` tables with proper indexing
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- **User Attribution**: Track who made each change with timestamps
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- **Version History**: Complete edit history preserved automatically
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### **API Enhancements**
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- **Version Endpoints**: `GET /{id}/versions`, `POST /{id}/rollback`
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- **User Attribution**: `X-User-ID` header support for all operations
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- **Automatic Versioning**: Current content archived before any update
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- **Clean Error Handling**: Proper HTTP status codes and error messages
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### **Frontend Version Control UI**
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- **History Button**: Added to all edit forms
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- **Version Modal**: Professional GitHub-style version history display
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- **One-Click Rollback**: Restore any previous version instantly
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- **User Attribution**: Display who made each change and when
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- **Version Comparison**: Preview content changes before restoring
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## 🔧 **Technical Implementation**
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### **ID Generation System (Fixed)**
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- **Deterministic IDs**: Same content always generates same ID
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- **CLI ↔ JS Consistency**: Both systems use identical SHA-1 based algorithm
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- **Content-Based Versioning**: Content changes create new IDs naturally
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- **Developer Override**: HTML `id` attribute takes precedence over generated IDs
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### **Database Schema**
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```sql
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-- Current content (latest versions only)
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CREATE TABLE content (
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id TEXT NOT NULL,
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site_id TEXT NOT NULL,
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value TEXT NOT NULL,
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type TEXT NOT NULL,
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created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
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updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
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last_edited_by TEXT,
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PRIMARY KEY (id, site_id)
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);
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-- Complete version history
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CREATE TABLE content_versions (
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version_id INTEGER PRIMARY KEY AUTOINCREMENT,
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content_id TEXT NOT NULL,
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site_id TEXT NOT NULL,
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value TEXT NOT NULL,
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type TEXT NOT NULL,
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created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
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created_by TEXT
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);
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```
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### **API Workflow Example**
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```bash
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# 1. Create content
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POST /api/content
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{"id": "hero-title", "value": "Original", "type": "text"}
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# 2. Update (auto-archives current version)
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PUT /api/content/hero-title?site_id=demo
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{"value": "Updated content"}
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# 3. View history
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GET /api/content/hero-title/versions?site_id=demo
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# Returns: [{"version_id": 1, "value": "Original", "created_by": "user"}]
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# 4. Rollback
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POST /api/content/hero-title/rollback?site_id=demo
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{"version_id": 1}
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```
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## 🎮 **User Experience**
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### **Content Editor Workflow**
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1. **Click Edit** on any `class="insertr"` element
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2. **Professional Modal** opens with current content
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3. **View History** button shows version timeline
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4. **Version Modal** displays all changes with timestamps and authors
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5. **One-Click Restore** to any previous version
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6. **All Changes Tracked** automatically with user attribution
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### **Developer Experience**
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- **Zero Configuration**: Still just add `class="insertr"`
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- **Hidden Complexity**: Version control happens transparently
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- **Full Control**: HTML `id` attribute overrides system-generated IDs
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- **Type Safety**: sqlc provides compile-time SQL validation
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- **Modern Tooling**: Professional database migration workflow
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## 📊 **Features Delivered**
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### ✅ **Core Version Control**
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- **Complete Edit History**: Every change preserved permanently
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- **User Attribution**: Track who made each change
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- **One-Click Rollback**: Restore any previous version instantly
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- **Automatic Versioning**: No manual intervention required
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### ✅ **Professional UI**
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- **GitHub-Style History**: Familiar version control interface
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- **Version Comparison**: See what changed between versions
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- **User-Friendly Timestamps**: "2h ago", "yesterday", etc.
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- **Responsive Design**: Works on mobile and desktop
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### ✅ **Developer Tools**
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- **sqlc Integration**: Type-safe database operations
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- **Clean Database Schema**: Proper indexing and relationships
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- **Development Commands**: `just server-generate`, `just server-clean-db`
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- **API Documentation**: Complete endpoint reference
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### ✅ **Production Ready**
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- **SQLite → PostgreSQL**: Easy database migration path
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- **Proper Error Handling**: Informative error messages
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- **CORS Configured**: Multi-origin support for development
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- **Health Checks**: Monitoring and debugging endpoints
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## 🚀 **What's Different Now**
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### **Before: Basic CMS**
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- Simple content editing
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- No version history
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- Temporal ID conflicts
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- No user tracking
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### **After: Professional CMS**
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- Complete version control with rollback
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- User attribution for all changes
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- Deterministic ID system (CLI ↔ JS consistent)
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- Modern database architecture (sqlc)
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- Professional editing UI with history
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- Production-ready API with proper error handling
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## 📋 **Development Workflow Enhanced**
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### **New Commands**
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```bash
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# Generate database code from SQL
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just server-generate
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# Clean development database
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just server-clean-db
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# Full version control development
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just dev # Now includes version history UI
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```
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### **Updated Files**
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- **Database**: `insertr-server/db/` - Complete sqlc setup
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- **API**: `internal/api/handlers.go` - Version control endpoints
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- **Frontend**: `lib/src/ui/form-renderer.js` - History modal UI
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- **Docs**: Updated README.md with version control features
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## 🎯 **Result**
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Insertr now provides **WordPress-style version control** with:
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- **Professional editing experience**
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- **Complete change tracking**
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- **Easy rollback functionality**
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- **Modern database architecture**
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- **Type-safe backend code**
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All while maintaining the **"zero configuration"** philosophy - developers still just add `class="insertr"` and get a complete CMS with version control.
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