[backport core/1.33] Fix workflow loading from PNG images with both workflow and parameter…#7265
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christian-byrne merged 2 commits intocore/1.33from Dec 9, 2025
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#7154) …s metadata - Reorder handleFile() to check workflow before parameters - Add validation to prevent JSON parse errors from crashing imports - Fix loadGraphData() to use explicit type validation instead of falsy check - Ensures ComfyUI-generated PNGs with both metadata types load the workflow, not parameters Fixes issue where large workflows (e.g., 634 nodes) were replaced with basic A1111 format when importing PNG files. ## Summary Fixed workflow loading from PNG images to prioritize workflow metadata over parameters, preventing large workflows from being replaced with basic A1111 format. ## Changes - **What**: Reordered `handleFile()` to check workflow before parameters, added JSON parse error handling and validation, fixed `loadGraphData()` to use explicit type checking instead of falsy check - **Dependencies**: None ## Review Focus The key issue was in `handleFile()` where parameters were checked before workflow, causing ComfyUI-generated PNGs (which contain both workflow and parameters metadata) to incorrectly import as A1111 format. The fix ensures: 1. Workflow is always checked first and validated properly 2. Parameters are only used as a fallback when no workflow exists 3. Invalid/malformed workflow data doesn't crash the import process Additionally, `loadGraphData()` was using a falsy check (`if (!graphData)`) which could incorrectly replace valid but falsy values. Now uses explicit type validation. Tested with real-world PNG containing 634-node workflow (780KB) + parameters (1KB) - now correctly loads the workflow instead of discarding it. <!-- Fixes #ISSUE_NUMBER --> ## Screenshots (if applicable) N/A - Backend logic fix, no UI changes Fixes #6633 ┆Issue is synchronized with this [Notion page](https://www.notion.so/PR-7154-Fix-workflow-loading-from-PNG-images-with-both-workflow-and-parameter-2bf6d73d365081ecb7a6c4bf6b6ccd51) by [Unito](https://www.unito.io) --------- Co-authored-by: Alexander Brown <DrJKL0424@gmail.com> Co-authored-by: Alexander Brown <drjkl@comfy.org>
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🔧 Auto-fixes AppliedThis PR has been automatically updated to fix linting and formatting issues.
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christian-byrne
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Dec 9, 2025
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Backport of #7154 to
core/1.33Automatically created by backport workflow.
┆Issue is synchronized with this Notion page by Unito