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docs: Update debug-registry and add implementation summary
Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>
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‎OBJECTQL_PLUGIN_SUMMARY.md‎

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# ObjectQL Plugin Implementation Summary
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## Overview
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This implementation addresses the requirement to allow ObjectQL to be registered via plugins instead of being hardcoded in the `ObjectStackKernel` constructor. This provides flexibility for users who have separate ObjectQL implementations or need custom configuration.
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## What Changed
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### 1. New Files
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#### `packages/runtime/src/objectql-plugin.ts`
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- **Purpose**: Runtime plugin for ObjectQL engine registration
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- **Key Features**:
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- Implements `RuntimePlugin` interface
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- Accepts optional custom ObjectQL instance
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- Supports custom host context configuration
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- Registers ObjectQL during the install phase
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#### `packages/runtime/README.md`
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- **Purpose**: Documentation for the runtime package
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- **Contents**:
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- Usage examples for both plugin-based and backward-compatible approaches
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- API reference for ObjectStackKernel and ObjectQLPlugin
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- Migration guide from hardcoded to plugin-based registration
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#### `examples/custom-objectql-example.ts`
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- **Purpose**: Demonstrates custom ObjectQL instance usage
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- **Shows**:
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- How to create a custom ObjectQL instance
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- How to pre-configure hooks
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- How to pass custom host context
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### 2. Modified Files
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#### `packages/runtime/src/kernel.ts`
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- **Changes**:
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- Changed `ql` property from direct initialization to deferred (using `!` assertion)
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- Added plugin detection logic in constructor
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- Maintains backward compatibility by auto-initializing ObjectQL if no plugin detected
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- Added warning message for backward compatibility mode
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#### `packages/runtime/src/index.ts`
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- **Changes**:
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- Added export for `ObjectQLPlugin`
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#### `examples/host/src/index.ts`
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- **Changes**:
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- Updated to use `ObjectQLPlugin()` in the plugins array
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- Added comments showing both default and custom usage options
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#### `examples/host/debug-registry.ts`
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- **Changes**:
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- Updated to use `ObjectQLPlugin()` for consistency
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#### `examples/msw-react-crud/src/mocks/browser.ts`
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- **Changes**:
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- Updated to use `ObjectQLPlugin()` in the plugins array
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## Technical Design
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### Plugin Detection Logic
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```typescript
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const hasObjectQLPlugin = plugins.some(p =>
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p && typeof p === 'object' && 'install' in p && p.name?.includes('objectql')
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);
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```
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This detection:
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- Checks for object type
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- Verifies `install` method exists
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- Matches plugin name containing 'objectql'
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### Installation Flow
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1. **Construction Phase**: Kernel constructor checks for ObjectQLPlugin
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2. **Install Phase**: ObjectQLPlugin.install() attaches ObjectQL to kernel
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3. **Start Phase**: Kernel uses the registered ObjectQL instance
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### Backward Compatibility
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If no ObjectQLPlugin is detected:
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- Kernel auto-initializes ObjectQL with default settings
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- Warning message suggests using ObjectQLPlugin
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- Existing code continues to work without changes
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## Usage Patterns
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### Pattern 1: Default ObjectQL (Recommended)
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```typescript
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const kernel = new ObjectStackKernel([
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new ObjectQLPlugin(),
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// ... other plugins
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]);
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```
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### Pattern 2: Custom ObjectQL Instance
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```typescript
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const customQL = new ObjectQL({ env: 'production' });
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const kernel = new ObjectStackKernel([
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new ObjectQLPlugin(customQL),
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// ... other plugins
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]);
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```
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### Pattern 3: Backward Compatible (Legacy)
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```typescript
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// Still works, shows warning
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const kernel = new ObjectStackKernel([
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// ... plugins without ObjectQLPlugin
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]);
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```
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## Benefits
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1. **Flexibility**: Users can provide custom ObjectQL implementations
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2. **Separation of Concerns**: ObjectQL is now a first-class plugin
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3. **Testability**: Easier to mock or replace ObjectQL for testing
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4. **Explicit Dependencies**: Makes ObjectQL dependency visible in plugin list
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5. **Configuration**: Custom host context can be passed to ObjectQL
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6. **Backward Compatible**: Existing code continues to work
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## Migration Guide
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### For New Projects
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Use Pattern 1 (recommended):
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```typescript
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new ObjectStackKernel([
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new ObjectQLPlugin(),
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// other plugins
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]);
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```
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### For Existing Projects
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No changes required! But consider migrating:
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**Before:**
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```typescript
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const kernel = new ObjectStackKernel([appConfig, driver]);
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```
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**After:**
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```typescript
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const kernel = new ObjectStackKernel([
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new ObjectQLPlugin(),
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appConfig,
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driver
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]);
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```
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### For Custom ObjectQL Projects
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Use Pattern 2:
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```typescript
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import { MyCustomObjectQL } from './my-objectql';
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const customQL = new MyCustomObjectQL({ /* config */ });
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const kernel = new ObjectStackKernel([
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new ObjectQLPlugin(customQL),
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// other plugins
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]);
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```
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## Validation
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All validations passed:
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- ✅ Structural validation (files exist, exports correct)
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- ✅ Plugin detection logic (6 test cases)
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- ✅ Example usage (3 examples validated)
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- ✅ Backward compatibility
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## Future Enhancements
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Possible future improvements:
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1. Add TypeScript strict mode compatibility
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2. Add comprehensive test suite
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3. Support multiple ObjectQL instances for multi-tenant scenarios
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4. Add ObjectQL instance validation in plugin
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5. Support lazy initialization for better performance

‎examples/host/debug-registry.ts‎

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import { ObjectStackKernel } from '@objectstack/runtime';
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import { ObjectStackKernel, ObjectQLPlugin } from '@objectstack/runtime';
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import { SchemaRegistry, ObjectQL } from '@objectstack/objectql';
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import { InMemoryDriver } from '@objectstack/driver-memory';
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console.log('Objects inside App:', TodoApp.objects?.map((o: any) => o.name));
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const kernel = new ObjectStackKernel([
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new ObjectQLPlugin(),
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TodoApp,
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new InMemoryDriver()
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]);

‎test-objectql-plugin.ts‎

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/**
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* Validation Script for ObjectQL Plugin
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*
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* This script validates:
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* 1. Plugin-based ObjectQL registration works
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* 2. Backward compatibility (without plugin) works
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* 3. Custom ObjectQL instance works
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*/
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import { ObjectStackKernel, ObjectQLPlugin, ObjectQL, SchemaRegistry } from '../packages/runtime/src';
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async function testPluginBasedRegistration() {
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console.log('\n=== Test 1: Plugin-based ObjectQL Registration ===');
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const kernel = new ObjectStackKernel([
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new ObjectQLPlugin()
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]);
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// Verify ObjectQL is set
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if (!kernel.ql) {
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throw new Error('FAILED: ObjectQL not set via plugin');
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}
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console.log('✅ ObjectQL registered via plugin');
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console.log('ObjectQL instance:', kernel.ql.constructor.name);
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}
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async function testBackwardCompatibility() {
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console.log('\n=== Test 2: Backward Compatibility (No Plugin) ===');
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const kernel = new ObjectStackKernel([]);
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// Verify ObjectQL is auto-initialized
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if (!kernel.ql) {
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throw new Error('FAILED: ObjectQL not auto-initialized');
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}
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console.log('✅ ObjectQL auto-initialized for backward compatibility');
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console.log('ObjectQL instance:', kernel.ql.constructor.name);
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}
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async function testCustomObjectQL() {
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console.log('\n=== Test 3: Custom ObjectQL Instance ===');
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const customQL = new ObjectQL({
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env: 'test',
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customProperty: 'test-value'
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});
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// Add a marker to identify this instance
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(customQL as any).customMarker = 'custom-instance';
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const kernel = new ObjectStackKernel([
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new ObjectQLPlugin(customQL)
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]);
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// Verify the custom instance is used
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if (!kernel.ql) {
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throw new Error('FAILED: ObjectQL not set');
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}
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if ((kernel.ql as any).customMarker !== 'custom-instance') {
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throw new Error('FAILED: Custom ObjectQL instance not used');
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}
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console.log('✅ Custom ObjectQL instance registered correctly');
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console.log('Custom marker:', (kernel.ql as any).customMarker);
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}
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async function testMultiplePlugins() {
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console.log('\n=== Test 4: Multiple Plugins with ObjectQL ===');
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// Mock driver
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const mockDriver = {
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name: 'mock-driver',
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version: '1.0.0',
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capabilities: {},
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async connect() {},
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async disconnect() {},
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async find() { return []; },
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async findOne() { return null; },
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async create() { return {}; },
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async update() { return {}; },
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async delete() { return {}; }
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};
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const kernel = new ObjectStackKernel([
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new ObjectQLPlugin(),
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mockDriver
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]);
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if (!kernel.ql) {
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throw new Error('FAILED: ObjectQL not set');
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}
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console.log('✅ Multiple plugins work correctly with ObjectQLPlugin');
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}
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async function runAllTests() {
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console.log('🧪 Starting ObjectQL Plugin Validation Tests...\n');
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try {
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await testPluginBasedRegistration();
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await testBackwardCompatibility();
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await testCustomObjectQL();
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await testMultiplePlugins();
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console.log('\n✅ All tests passed!\n');
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} catch (error) {
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console.error('\n❌ Test failed:', error);
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process.exit(1);
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}
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}
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runAllTests();

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