My DIY version is 1.0.0. I created a workflow where one node is an iteration node, and the next node after the iteration node is an LLM node. Why can't I introduce the output of the iteration node in the prompt of the LLM node. How can I incorporate the output of iterative nodes into the prompt words of LLM nodes?General Discussion

[gongchangping]

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My DIY version is 1.0.0. I created a workflow where one node is an iteration node, and the next node after the iteration node is an LLM node. Why can't I introduce the output of the iteration node in the prompt of the LLM node. How can I incorporate the output of iterative nodes into the prompt words of LLM nodes?

[dosubot[bot]]

The issue is that LLM nodes only accept string-type variables directly in prompts, but iteration nodes output arrays. Here's how to solve this:

Solution: Add a Template node between the iteration and LLM nodes

1. Place a Template node after your iteration node
2. In the Template node, convert the array output to a string format (e.g., join array items with newlines or format as text)
3. Reference the Template node's string output in your LLM prompt

Also verify your iteration node configuration:

• Make sure you've set the output_selector to explicitly specify which variables should be exposed outside the iteration loop
• Only variables configured in the output selector are aggregated and made available to downstream nodes

Version note: You mentioned you're on version 1.0.0. There have been important fixes for iteration node variable handling in later versions. Consider upgrading to v1.3.1+ or newer for better iteration node support.

To reply, just mention @dosu.

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