From e95ac7c335779e742b99a68255364b2bd4be742b Mon Sep 17 00:00:00 2001 From: czlonkowski <56956555+czlonkowski@users.noreply.github.com> Date: Tue, 7 Oct 2025 16:54:29 +0200 Subject: [PATCH 1/2] fix: add validation for resourceLocator properties in AI model nodes MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This fixes a critical validation gap where AI agents could create invalid configurations for nodes using resourceLocator properties (primarily AI model nodes like OpenAI Chat Model v1.2+, Anthropic, Cohere, etc.). Before this fix, AI agents could incorrectly pass a string value like: model: "gpt-4o-mini" Instead of the required object format: model: { mode: "list", value: "gpt-4o-mini" } These invalid configs would pass validation but fail at runtime in n8n. Changes: - Added resourceLocator type validation in config-validator.ts (lines 237-274) - Validates value is an object with required 'mode' and 'value' properties - Provides helpful error messages with exact fix suggestions - Added 10 comprehensive test cases (100% passing) - Updated version to 2.17.3 - Added CHANGELOG entry Affected nodes: OpenAI Chat Model (v1.2+), Anthropic, Cohere, DeepSeek, Groq, Mistral, OpenRouter, xAI Grok Chat Models, and embeddings nodes. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude --- CHANGELOG.md | 35 +++ data/nodes.db | Bin 62623744 -> 62623744 bytes package.json | 2 +- package.runtime.json | 2 +- src/services/config-validator.ts | 39 ++- .../services/config-validator-basic.test.ts | 239 ++++++++++++++++++ 6 files changed, 314 insertions(+), 3 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index f76edd8..176b6f0 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -5,6 +5,41 @@ All notable changes to this project will be documented in this file. The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). +## [2.17.3] - 2025-10-07 + +### 🔧 Validation + +**Fixed critical validation gap for AI model nodes with resourceLocator properties.** + +This release adds validation for `resourceLocator` type properties, fixing a critical issue where AI agents could create invalid configurations that passed validation but failed at runtime. + +#### Fixed + +- **resourceLocator Property Validation** + - **Issue:** No validation existed for `resourceLocator` type properties used in AI model nodes + - **Impact:** + - AI agents could create invalid configurations like `model: "gpt-4o-mini"` (string) instead of `model: {mode: "list", value: "gpt-4o-mini"}` (object) + - Invalid configs passed validation but failed at runtime in n8n + - Affected many langchain nodes: OpenAI Chat Model (v1.2+), Anthropic, Cohere, DeepSeek, Groq, Mistral, OpenRouter, xAI Grok, and embeddings nodes + - **Root Cause:** `validatePropertyTypes()` method in ConfigValidator only validated `string`, `number`, `boolean`, and `options` types - `resourceLocator` was completely missing + - **Fix:** Added comprehensive resourceLocator validation in `config-validator.ts:237-274` + - Validates value is an object (not string, number, null, or array) + - Validates required `mode` property exists and is a string + - Validates required `value` property exists + - Provides helpful error messages with exact fix suggestions + - Example error: `Property 'model' is a resourceLocator and must be an object with 'mode' and 'value' properties, got string` + - Example fix: `Change model to { mode: "list", value: "gpt-4o-mini" } or { mode: "id", value: "gpt-4o-mini" }` + +#### Added + +- 10 comprehensive test cases for resourceLocator validation covering: + - String value rejection with helpful fix suggestions + - Null and array value rejection + - Missing `mode` or `value` property detection + - Invalid `mode` type detection (e.g., number instead of string) + - Valid resourceLocator acceptance for both "list" and "id" modes + - All tests passing (100% coverage for new validation logic) + ## [2.17.1] - 2025-10-07 ### 🔧 Telemetry diff --git a/data/nodes.db b/data/nodes.db index 8c0f831e65641eddf8e70c5efcf8e322c5e1f64f..0152e62fa76930848e8d29f34f29107f55187dc3 100644 GIT binary patch delta 4668 zcmZwHb#RpD8iw)xc7rAmT!JLHySux)!;QNoxCVJ}2n0xQcXumg6PmiaVRhP4pg@bm zc`yDtbLM*+wFX@u9bN*KlS-)o%i{2m-P7p9elo9*H@LU`4X&Pl3Z5m@5YZ_-7Z;Cd>m?oGenkJbho2Hninx>hin`W41nr4}1n_^9KOmj{1 zO!G}N3VGp4hq zbEfmA3#Qjh7fr95E}4R+BvZ2KvgwV}N{Juuk36`#gO@8YEIOr|KXPAUa!g9@#97fP z-TjfHUcGQPI;FKgvYtD4OI#b1QqrG4dZAl#z3F<(^|tFB*SoIwT<^O+aDC|d$n~-7 z6W6D%&s?9ozHoi%`pWgS>l@d%uJ2smyRNvdx~{pdyKcCCaQ*1|$@R1A7uT<@-&{9c zzq|f${pq^p`pb3Ob;otr^|$Mu>%QxO>mS#@u7|EiuE(w?uBWbNuIH{7u9r)bW4t&Q z_#prxkP1>m8b}N2AU%Xa7-WEq5Du9jGh~6RkPWg!4#)|)AU8xn9>@#%AU{Mx6cm7h 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0cc150c..0a7a85f 100644 --- a/package.runtime.json +++ b/package.runtime.json @@ -1,6 +1,6 @@ { "name": "n8n-mcp-runtime", - "version": "2.17.1", + "version": "2.17.3", "description": "n8n MCP Server Runtime Dependencies Only", "private": true, "dependencies": { diff --git a/src/services/config-validator.ts b/src/services/config-validator.ts index cea5ebb..1a59e72 100644 --- a/src/services/config-validator.ts +++ b/src/services/config-validator.ts @@ -234,8 +234,45 @@ export class ConfigValidator { message: `Property '${key}' must be a boolean, got ${typeof value}`, fix: `Change ${key} to true or false` }); + } else if (prop.type === 'resourceLocator') { + // resourceLocator must be an object with mode and value properties + if (typeof value !== 'object' || value === null || Array.isArray(value)) { + const fixValue = typeof value === 'string' ? value : JSON.stringify(value); + errors.push({ + type: 'invalid_type', + property: key, + message: `Property '${key}' is a resourceLocator and must be an object with 'mode' and 'value' properties, got ${typeof value}`, + fix: `Change ${key} to { mode: "list", value: ${JSON.stringify(fixValue)} } or { mode: "id", value: ${JSON.stringify(fixValue)} }` + }); + } else { + // Check required properties + if (!value.mode) { + errors.push({ + type: 'missing_required', + property: `${key}.mode`, + message: `resourceLocator '${key}' is missing required property 'mode'`, + fix: `Add mode property: { mode: "list", value: ${JSON.stringify(value.value || '')} }` + }); + } else if (typeof value.mode !== 'string') { + errors.push({ + type: 'invalid_type', + property: `${key}.mode`, + message: `resourceLocator '${key}.mode' must be a string, got ${typeof value.mode}`, + fix: `Set mode to "list" or "id"` + }); + } + + if (value.value === undefined) { + errors.push({ + type: 'missing_required', + property: `${key}.value`, + message: `resourceLocator '${key}' is missing required property 'value'`, + fix: `Add value property to specify the ${prop.displayName || key}` + }); + } + } } - + // Options validation if (prop.type === 'options' && prop.options) { const validValues = prop.options.map((opt: any) => diff --git a/tests/unit/services/config-validator-basic.test.ts b/tests/unit/services/config-validator-basic.test.ts index dc97072..8e2abfc 100644 --- a/tests/unit/services/config-validator-basic.test.ts +++ b/tests/unit/services/config-validator-basic.test.ts @@ -439,4 +439,243 @@ describe('ConfigValidator - Basic Validation', () => { expect(result.suggestions.length).toBeGreaterThanOrEqual(0); }); }); + + describe('resourceLocator validation', () => { + it('should reject string value when resourceLocator object is required', () => { + const nodeType = '@n8n/n8n-nodes-langchain.lmChatOpenAi'; + const config = { + model: 'gpt-4o-mini' // Wrong - should be object with mode and value + }; + const properties = [ + { + name: 'model', + displayName: 'Model', + type: 'resourceLocator', + required: true, + default: { mode: 'list', value: 'gpt-4o-mini' } + } + ]; + + const result = ConfigValidator.validate(nodeType, config, properties); + + expect(result.valid).toBe(false); + expect(result.errors).toHaveLength(1); + expect(result.errors[0]).toMatchObject({ + type: 'invalid_type', + property: 'model', + message: expect.stringContaining('must be an object with \'mode\' and \'value\' properties') + }); + expect(result.errors[0].fix).toContain('mode'); + expect(result.errors[0].fix).toContain('value'); + }); + + it('should accept valid resourceLocator with mode and value', () => { + const nodeType = '@n8n/n8n-nodes-langchain.lmChatOpenAi'; + const config = { + model: { + mode: 'list', + value: 'gpt-4o-mini' + } + }; + const properties = [ + { + name: 'model', + displayName: 'Model', + type: 'resourceLocator', + required: true, + default: { mode: 'list', value: 'gpt-4o-mini' } + } + ]; + + const result = ConfigValidator.validate(nodeType, config, properties); + + expect(result.valid).toBe(true); + expect(result.errors).toHaveLength(0); + }); + + it('should reject null value for resourceLocator', () => { + const nodeType = '@n8n/n8n-nodes-langchain.lmChatOpenAi'; + const config = { + model: null + }; + const properties = [ + { + name: 'model', + type: 'resourceLocator', + required: true + } + ]; + + const result = ConfigValidator.validate(nodeType, config, properties); + + expect(result.valid).toBe(false); + expect(result.errors.some(e => + e.property === 'model' && + e.type === 'invalid_type' + )).toBe(true); + }); + + it('should reject array value for resourceLocator', () => { + const nodeType = '@n8n/n8n-nodes-langchain.lmChatOpenAi'; + const config = { + model: ['gpt-4o-mini'] + }; + const properties = [ + { + name: 'model', + type: 'resourceLocator', + required: true + } + ]; + + const result = ConfigValidator.validate(nodeType, config, properties); + + expect(result.valid).toBe(false); + expect(result.errors.some(e => + e.property === 'model' && + e.type === 'invalid_type' && + e.message.includes('must be an object') + )).toBe(true); + }); + + it('should detect missing mode property in resourceLocator', () => { + const nodeType = '@n8n/n8n-nodes-langchain.lmChatOpenAi'; + const config = { + model: { + value: 'gpt-4o-mini' + // Missing mode property + } + }; + const properties = [ + { + name: 'model', + type: 'resourceLocator', + required: true + } + ]; + + const result = ConfigValidator.validate(nodeType, config, properties); + + expect(result.valid).toBe(false); + expect(result.errors.some(e => + e.property === 'model.mode' && + e.type === 'missing_required' && + e.message.includes('missing required property \'mode\'') + )).toBe(true); + }); + + it('should detect missing value property in resourceLocator', () => { + const nodeType = '@n8n/n8n-nodes-langchain.lmChatOpenAi'; + const config = { + model: { + mode: 'list' + // Missing value property + } + }; + const properties = [ + { + name: 'model', + displayName: 'Model', + type: 'resourceLocator', + required: true + } + ]; + + const result = ConfigValidator.validate(nodeType, config, properties); + + expect(result.valid).toBe(false); + expect(result.errors.some(e => + e.property === 'model.value' && + e.type === 'missing_required' && + e.message.includes('missing required property \'value\'') + )).toBe(true); + }); + + it('should detect invalid mode type in resourceLocator', () => { + const nodeType = '@n8n/n8n-nodes-langchain.lmChatOpenAi'; + const config = { + model: { + mode: 123, // Should be string + value: 'gpt-4o-mini' + } + }; + const properties = [ + { + name: 'model', + type: 'resourceLocator', + required: true + } + ]; + + const result = ConfigValidator.validate(nodeType, config, properties); + + expect(result.valid).toBe(false); + expect(result.errors.some(e => + e.property === 'model.mode' && + e.type === 'invalid_type' && + e.message.includes('must be a string') + )).toBe(true); + }); + + it('should accept resourceLocator with mode "id"', () => { + const nodeType = '@n8n/n8n-nodes-langchain.lmChatOpenAi'; + const config = { + model: { + mode: 'id', + value: 'gpt-4o-2024-11-20' + } + }; + const properties = [ + { + name: 'model', + type: 'resourceLocator', + required: true + } + ]; + + const result = ConfigValidator.validate(nodeType, config, properties); + + expect(result.valid).toBe(true); + expect(result.errors).toHaveLength(0); + }); + + it('should reject number value when resourceLocator is required', () => { + const nodeType = '@n8n/n8n-nodes-langchain.lmChatOpenAi'; + const config = { + model: 12345 // Wrong type + }; + const properties = [ + { + name: 'model', + type: 'resourceLocator', + required: true + } + ]; + + const result = ConfigValidator.validate(nodeType, config, properties); + + expect(result.valid).toBe(false); + expect(result.errors[0].type).toBe('invalid_type'); + expect(result.errors[0].message).toContain('must be an object'); + }); + + it('should provide helpful fix suggestion for string to resourceLocator conversion', () => { + const nodeType = '@n8n/n8n-nodes-langchain.lmChatOpenAi'; + const config = { + model: 'gpt-4o-mini' + }; + const properties = [ + { + name: 'model', + type: 'resourceLocator', + required: true + } + ]; + + const result = ConfigValidator.validate(nodeType, config, properties); + + expect(result.errors[0].fix).toContain('{ mode: "list", value: "gpt-4o-mini" }'); + expect(result.errors[0].fix).toContain('{ mode: "id", value: "gpt-4o-mini" }'); + }); + }); }); \ No newline at end of file From 2c536a25fd8cb5daaf56c91d3f8e220c055349d3 Mon Sep 17 00:00:00 2001 From: czlonkowski <56956555+czlonkowski@users.noreply.github.com> Date: Tue, 7 Oct 2025 16:59:43 +0200 Subject: [PATCH 2/2] refactor: improve resourceLocator validation based on code review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Implemented code review suggestions (score 9.5/10): 1. Added mode value validation (lines 267-274): - Validates mode is 'list', 'id', or 'url' - Provides clear error for invalid mode values - Prevents runtime errors from unsupported modes 2. Added JSDoc documentation (lines 238-242): - Explains resourceLocator structure and usage - Documents common mistakes (string vs object) - Helps future maintainers understand context 3. Added 4 additional test cases: - Invalid mode value rejection - Mode "url" acceptance - Empty object detection - Extra properties handling Test Results: - 29 tests passing (was 25) - 100% coverage of validation logic - All edge cases covered 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude --- CHANGELOG.md | 10 +- src/services/config-validator.ts | 13 ++- .../services/config-validator-basic.test.ts | 92 +++++++++++++++++++ 3 files changed, 111 insertions(+), 4 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index 176b6f0..1e4bfb8 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -32,13 +32,17 @@ This release adds validation for `resourceLocator` type properties, fixing a cri #### Added -- 10 comprehensive test cases for resourceLocator validation covering: +- Comprehensive resourceLocator validation with 14 test cases covering: - String value rejection with helpful fix suggestions - Null and array value rejection - Missing `mode` or `value` property detection - Invalid `mode` type detection (e.g., number instead of string) - - Valid resourceLocator acceptance for both "list" and "id" modes - - All tests passing (100% coverage for new validation logic) + - Invalid `mode` value validation (must be 'list', 'id', or 'url') + - Empty object detection (missing both mode and value) + - Extra properties handling (ignored gracefully) + - Valid resourceLocator acceptance for "list", "id", and "url" modes + - JSDoc documentation explaining resourceLocator structure and common mistakes + - All 29 tests passing (100% coverage for new validation logic) ## [2.17.1] - 2025-10-07 diff --git a/src/services/config-validator.ts b/src/services/config-validator.ts index 1a59e72..2028aea 100644 --- a/src/services/config-validator.ts +++ b/src/services/config-validator.ts @@ -235,7 +235,11 @@ export class ConfigValidator { fix: `Change ${key} to true or false` }); } else if (prop.type === 'resourceLocator') { - // resourceLocator must be an object with mode and value properties + // resourceLocator validation: Used by AI model nodes (OpenAI, Anthropic, etc.) + // Must be an object with required properties: + // - mode: string ('list' | 'id' | 'url') + // - value: any (the actual model/resource identifier) + // Common mistake: passing string directly instead of object structure if (typeof value !== 'object' || value === null || Array.isArray(value)) { const fixValue = typeof value === 'string' ? value : JSON.stringify(value); errors.push({ @@ -260,6 +264,13 @@ export class ConfigValidator { message: `resourceLocator '${key}.mode' must be a string, got ${typeof value.mode}`, fix: `Set mode to "list" or "id"` }); + } else if (!['list', 'id', 'url'].includes(value.mode)) { + errors.push({ + type: 'invalid_value', + property: `${key}.mode`, + message: `resourceLocator '${key}.mode' must be 'list', 'id', or 'url', got '${value.mode}'`, + fix: `Change mode to "list", "id", or "url"` + }); } if (value.value === undefined) { diff --git a/tests/unit/services/config-validator-basic.test.ts b/tests/unit/services/config-validator-basic.test.ts index 8e2abfc..1da62f0 100644 --- a/tests/unit/services/config-validator-basic.test.ts +++ b/tests/unit/services/config-validator-basic.test.ts @@ -677,5 +677,97 @@ describe('ConfigValidator - Basic Validation', () => { expect(result.errors[0].fix).toContain('{ mode: "list", value: "gpt-4o-mini" }'); expect(result.errors[0].fix).toContain('{ mode: "id", value: "gpt-4o-mini" }'); }); + + it('should reject invalid mode values', () => { + const nodeType = '@n8n/n8n-nodes-langchain.lmChatOpenAi'; + const config = { + model: { + mode: 'invalid-mode', + value: 'gpt-4o-mini' + } + }; + const properties = [ + { + name: 'model', + type: 'resourceLocator', + required: true + } + ]; + + const result = ConfigValidator.validate(nodeType, config, properties); + + expect(result.valid).toBe(false); + expect(result.errors.some(e => + e.property === 'model.mode' && + e.type === 'invalid_value' && + e.message.includes("must be 'list', 'id', or 'url'") + )).toBe(true); + }); + + it('should accept resourceLocator with mode "url"', () => { + const nodeType = '@n8n/n8n-nodes-langchain.lmChatOpenAi'; + const config = { + model: { + mode: 'url', + value: 'https://api.example.com/models/custom' + } + }; + const properties = [ + { + name: 'model', + type: 'resourceLocator', + required: true + } + ]; + + const result = ConfigValidator.validate(nodeType, config, properties); + + expect(result.valid).toBe(true); + expect(result.errors).toHaveLength(0); + }); + + it('should detect empty resourceLocator object', () => { + const nodeType = '@n8n/n8n-nodes-langchain.lmChatOpenAi'; + const config = { + model: {} // Empty object, missing both mode and value + }; + const properties = [ + { + name: 'model', + type: 'resourceLocator', + required: true + } + ]; + + const result = ConfigValidator.validate(nodeType, config, properties); + + expect(result.valid).toBe(false); + expect(result.errors.length).toBeGreaterThanOrEqual(2); // Both mode and value missing + expect(result.errors.some(e => e.property === 'model.mode')).toBe(true); + expect(result.errors.some(e => e.property === 'model.value')).toBe(true); + }); + + it('should handle resourceLocator with extra properties gracefully', () => { + const nodeType = '@n8n/n8n-nodes-langchain.lmChatOpenAi'; + const config = { + model: { + mode: 'list', + value: 'gpt-4o-mini', + extraProperty: 'ignored' // Extra properties should be ignored + } + }; + const properties = [ + { + name: 'model', + type: 'resourceLocator', + required: true + } + ]; + + const result = ConfigValidator.validate(nodeType, config, properties); + + expect(result.valid).toBe(true); // Should pass with extra properties + expect(result.errors).toHaveLength(0); + }); }); }); \ No newline at end of file