fix: webhook and 4 other nodes incorrectly marked as non-triggers

Fixed issue where Docker images using sql.js adapter returned boolean fields
as strings, causing is_trigger=0 to evaluate as true instead of false.

Changes:
- Added convertIntegerColumns() to sql.js adapter to convert SQLite integers
- Updated server.ts and node-repository.ts to use Number() conversion as backup
- Added test script to verify fix works with sql.js adapter

This fixes webhook, cron, interval, and emailReadImap nodes showing
isTrigger: false in Docker deployments.

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

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

scripts/test-sqljs-triggers.ts

@@ -0,0 +1,86 @@
+#!/usr/bin/env node
+/**
+ * Test script to verify trigger detection works with sql.js adapter
+ */
+
+import { createDatabaseAdapter } from '../src/database/database-adapter';
+import { NodeRepository } from '../src/database/node-repository';
+import { logger } from '../src/utils/logger';
+import path from 'path';
+
+async function testSqlJsTriggers() {
+  logger.info('🧪 Testing trigger detection with sql.js adapter...\n');
+  
+  try {
+    // Force sql.js by temporarily renaming better-sqlite3
+    const originalRequire = require.cache[require.resolve('better-sqlite3')];
+    if (originalRequire) {
+      delete require.cache[require.resolve('better-sqlite3')];
+    }
+    
+    // Mock better-sqlite3 to force sql.js usage
+    const Module = require('module');
+    const originalResolveFilename = Module._resolveFilename;
+    Module._resolveFilename = function(request: string, parent: any, isMain: boolean) {
+      if (request === 'better-sqlite3') {
+        throw new Error('Forcing sql.js adapter for testing');
+      }
+      return originalResolveFilename.apply(this, arguments);
+    };
+    
+    // Now create adapter - should use sql.js
+    const dbPath = path.join(process.cwd(), 'data', 'nodes.db');
+    logger.info(`📁 Database path: ${dbPath}`);
+    
+    const adapter = await createDatabaseAdapter(dbPath);
+    logger.info('✅ Adapter created (should be sql.js)\n');
+    
+    // Test direct query
+    logger.info('📊 Testing direct database query:');
+    const triggerNodes = ['nodes-base.webhook', 'nodes-base.cron', 'nodes-base.interval', 'nodes-base.emailReadImap'];
+    
+    for (const nodeType of triggerNodes) {
+      const row = adapter.prepare('SELECT * FROM nodes WHERE node_type = ?').get(nodeType);
+      if (row) {
+        logger.info(`${nodeType}:`);
+        logger.info(`  is_trigger raw value: ${row.is_trigger} (type: ${typeof row.is_trigger})`);
+        logger.info(`  !!is_trigger: ${!!row.is_trigger}`);
+        logger.info(`  Number(is_trigger) === 1: ${Number(row.is_trigger) === 1}`);
+      }
+    }
+    
+    // Test through repository
+    logger.info('\n📦 Testing through NodeRepository:');
+    const repository = new NodeRepository(adapter);
+    
+    for (const nodeType of triggerNodes) {
+      const node = repository.getNode(nodeType);
+      if (node) {
+        logger.info(`${nodeType}: isTrigger = ${node.isTrigger}`);
+      }
+    }
+    
+    // Test list query
+    logger.info('\n📋 Testing list query:');
+    const allTriggers = adapter.prepare(
+      'SELECT node_type, is_trigger FROM nodes WHERE node_type IN (?, ?, ?, ?)'
+    ).all(...triggerNodes);
+    
+    for (const node of allTriggers) {
+      logger.info(`${node.node_type}: is_trigger = ${node.is_trigger} (type: ${typeof node.is_trigger})`);
+    }
+    
+    adapter.close();
+    logger.info('\n✅ Test complete!');
+    
+    // Restore original require
+    Module._resolveFilename = originalResolveFilename;
+    
+  } catch (error) {
+    logger.error('Test failed:', error);
+    process.exit(1);
+  }
+}
+
+// Run test
+testSqlJsTriggers().catch(console.error);

src/database/database-adapter.ts

@@ -338,7 +338,7 @@ class SQLJSStatement implements PreparedStatement {
     if (this.stmt.step()) {
       const result = this.stmt.getAsObject();
       this.stmt.reset();
-      return result;
+      return this.convertIntegerColumns(result);
     }
     
     this.stmt.reset();
@@ -354,7 +354,7 @@ class SQLJSStatement implements PreparedStatement {
     
     const results: any[] = [];
     while (this.stmt.step()) {
-      results.push(this.stmt.getAsObject());
+      results.push(this.convertIntegerColumns(this.stmt.getAsObject()));
     }
     
     this.stmt.reset();
@@ -400,4 +400,24 @@ class SQLJSStatement implements PreparedStatement {
       this.boundParams = params;
     }
   }
+  
+  /**
+   * Convert SQLite integer columns to JavaScript numbers
+   * sql.js returns all values as strings, but we need proper types for boolean conversion
+   */
+  private convertIntegerColumns(row: any): any {
+    if (!row) return row;
+    
+    // Known integer columns in the nodes table
+    const integerColumns = ['is_ai_tool', 'is_trigger', 'is_webhook', 'is_versioned'];
+    
+    const converted = { ...row };
+    for (const col of integerColumns) {
+      if (col in converted && typeof converted[col] === 'string') {
+        converted[col] = parseInt(converted[col], 10);
+      }
+    }
+    
+    return converted;
+  }
 }

src/database/node-repository.ts

@@ -53,10 +53,10 @@ export class NodeRepository {
       category: row.category,
       developmentStyle: row.development_style,
       package: row.package_name,
-      isAITool: !!row.is_ai_tool,
+      isAITool: Number(row.is_ai_tool) === 1,
-      isTrigger: !!row.is_trigger,
+      isTrigger: Number(row.is_trigger) === 1,
-      isWebhook: !!row.is_webhook,
+      isWebhook: Number(row.is_webhook) === 1,
-      isVersioned: !!row.is_versioned,
+      isVersioned: Number(row.is_versioned) === 1,
       version: row.version,
       properties: this.safeJsonParse(row.properties_schema, []),
       operations: this.safeJsonParse(row.operations, []),

src/mcp/server.ts

@@ -331,9 +331,9 @@ export class N8NDocumentationMCPServer {
         category: node.category,
         package: node.package_name,
         developmentStyle: node.development_style,
-        isAITool: !!node.is_ai_tool,
+        isAITool: Number(node.is_ai_tool) === 1,
-        isTrigger: !!node.is_trigger,
+        isTrigger: Number(node.is_trigger) === 1,
-        isVersioned: !!node.is_versioned,
+        isVersioned: Number(node.is_versioned) === 1,
       })),
       totalCount: nodes.length,
     };