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fix: improve error message when node type is missing
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- Change error type from 'invalid_prompt' to 'missing_node_type' for frontend detection
- Add extra_info with node_id, class_type, and node_title (from _meta.title)
- Improve user-facing message: 'Node X not found. The custom node may not be installed.'

Fixes COM-12528

Co-authored-by: Amp <amp@ampcode.com>
Amp-Thread-ID: https://ampcode.com/threads/T-019c0df1-aa57-72e0-8193-46aa24b5a327
This commit is contained in:
bymyself 2026-01-30 13:40:04 -08:00
parent 3aace5c8dc
commit 0e40fb566e
1 changed files with 18 additions and 6 deletions
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24
execution.py
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@ -1000,22 +1000,34 @@ async def validate_prompt(prompt_id, prompt, partial_execution_list: Union[list[
outputs = set()
for x in prompt:
if 'class_type' not in prompt[x]:
node_data = prompt[x]
node_title = node_data.get('_meta', {}).get('title')
error = {
"type": "invalid_prompt",
"message": "Cannot execute because a node is missing the class_type property.",
"type": "missing_node_type",
"message": f"Node '{node_title or f'ID #{x}'}' has no class_type. The workflow may be corrupted or a custom node is missing.",
"details": f"Node ID '#{x}'",
"extra_info": {}
"extra_info": {
"node_id": x,
"class_type": None,
"node_title": node_title
}
}
return (False, error, [], {})
class_type = prompt[x]['class_type']
class_ = nodes.NODE_CLASS_MAPPINGS.get(class_type, None)
if class_ is None:
node_data = prompt[x]
node_title = node_data.get('_meta', {}).get('title', class_type)
error = {
"type": "invalid_prompt",
"message": f"Cannot execute because node {class_type} does not exist.",
"type": "missing_node_type",
"message": f"Node '{node_title}' not found. The custom node may not be installed.",
"details": f"Node ID '#{x}'",
"extra_info": {}
"extra_info": {
"node_id": x,
"class_type": class_type,
"node_title": node_title
}
}
return (False, error, [], {})