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fix: mcpTrigger nodes no longer flagged as disconnected (#503) (#506)

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Fixed validation bug where mcpTrigger nodes were incorrectly flagged as
"disconnected nodes" when using n8n_update_partial_workflow or
n8n_update_full_workflow. This blocked ALL updates to MCP server workflows.

Changes:
- Extended validateWorkflowStructure() to check all 7 connection types
  (main, error, ai_tool, ai_languageModel, ai_memory, ai_embedding, ai_vectorStore)
- Updated trigger node validation to accept either outgoing OR inbound connections
- Added 7 new tests covering all AI connection types

Fixes #503

Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en

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

Co-authored-by: Romuald Członkowski <romualdczlonkowski@MacBook-Pro-Romuald.local>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Romuald Członkowski
2025-12-23 18:50:55 +01:00
committed by GitHub
parent d60182eeb8
commit 705d31c35e
7 changed files with 320 additions and 25 deletions
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28
dist/services/n8n-validation.js vendored
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@@ -152,17 +152,23 @@ function validateWorkflowStructure(workflow) {
}
else if (connectionCount > 0 || executableNodes.length > 1) {
const connectedNodes = new Set();
const ALL_CONNECTION_TYPES = ['main', 'error', 'ai_tool', 'ai_languageModel', 'ai_memory', 'ai_embedding', 'ai_vectorStore'];
Object.entries(workflow.connections).forEach(([sourceName, connection]) => {
connectedNodes.add(sourceName);
if (connection.main && Array.isArray(connection.main)) {
connection.main.forEach((outputs) => {
if (Array.isArray(outputs)) {
outputs.forEach((target) => {
connectedNodes.add(target.node);
});
}
});
}
ALL_CONNECTION_TYPES.forEach(connType => {
const connData = connection[connType];
if (connData && Array.isArray(connData)) {
connData.forEach((outputs) => {
if (Array.isArray(outputs)) {
outputs.forEach((target) => {
if (target?.node) {
connectedNodes.add(target.node);
}
});
}
});
}
});
});
const disconnectedNodes = workflow.nodes.filter(node => {
if ((0, node_classification_1.isNonExecutableNode)(node.type)) {
@@ -171,7 +177,9 @@ function validateWorkflowStructure(workflow) {
const isConnected = connectedNodes.has(node.name);
const isNodeTrigger = (0, node_type_utils_1.isTriggerNode)(node.type);
if (isNodeTrigger) {
return !workflow.connections?.[node.name];
const hasOutgoingConnections = !!workflow.connections?.[node.name];
const hasInboundConnections = isConnected;
return !hasOutgoingConnections && !hasInboundConnections;
}
return !isConnected;
});