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fix: Continue on fail / error output support for chains and agents (#9078)

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This commit is contained in:
Michael Kret
2024-04-09 15:06:12 +03:00
committed by GitHub
parent 8c2622549b
commit f62800cd72
9 changed files with 469 additions and 388 deletions
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99
packages/@n8n/nodes-langchain/nodes/chains/ChainLLM/ChainLlm.node.ts
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@@ -519,55 +519,64 @@ export class ChainLlm implements INodeType {
const outputParsers = await getOptionalOutputParsers(this);
for (let itemIndex = 0; itemIndex < items.length; itemIndex++) {
let prompt: string;
if (this.getNode().typeVersion <= 1.3) {
prompt = this.getNodeParameter('prompt', itemIndex) as string;
} else {
prompt = getPromptInputByType({
ctx: this,
i: itemIndex,
inputKey: 'text',
promptTypeKey: 'promptType',
});
}
const messages = this.getNodeParameter(
'messages.messageValues',
itemIndex,
[],
) as MessagesTemplate[];
if (prompt === undefined) {
throw new NodeOperationError(this.getNode(), 'The ‘prompt’ parameter is empty.');
}
const responses = await getChain(this, itemIndex, prompt, llm, outputParsers, messages);
responses.forEach((response) => {
let data: IDataObject;
if (typeof response === 'string') {
data = {
response: {
text: response.trim(),
},
};
} else if (Array.isArray(response)) {
data = {
data: response,
};
} else if (response instanceof Object) {
data = response as IDataObject;
try {
let prompt: string;
if (this.getNode().typeVersion <= 1.3) {
prompt = this.getNodeParameter('prompt', itemIndex) as string;
} else {
data = {
response: {
text: response,
},
};
prompt = getPromptInputByType({
ctx: this,
i: itemIndex,
inputKey: 'text',
promptTypeKey: 'promptType',
});
}
const messages = this.getNodeParameter(
'messages.messageValues',
itemIndex,
[],
) as MessagesTemplate[];
if (prompt === undefined) {
throw new NodeOperationError(this.getNode(), "The 'prompt' parameter is empty.");
}
returnData.push({
json: data,
const responses = await getChain(this, itemIndex, prompt, llm, outputParsers, messages);
responses.forEach((response) => {
let data: IDataObject;
if (typeof response === 'string') {
data = {
response: {
text: response.trim(),
},
};
} else if (Array.isArray(response)) {
data = {
data: response,
};
} else if (response instanceof Object) {
data = response as IDataObject;
} else {
data = {
response: {
text: response,
},
};
}
returnData.push({
json: data,
});
});
});
} catch (error) {
if (this.continueOnFail()) {
returnData.push({ json: { error: error.message }, pairedItem: { item: itemIndex } });
continue;
}
throw error;
}
}
return [returnData];