fix(python): Resolve PydanticUserError for mutually recursive models in Pydantic v2#10519
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fix(python): Resolve PydanticUserError for mutually recursive models in Pydantic v2#10519
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…th update_forward_refs This change improves handling of circular references in self-referential union members by: 1. Reverting F401 from noqa comments in imports_manager.py (back to E402, I001) 2. Tracking self-referential union member dependencies separately 3. Generating update_forward_refs(Model, GhostRef=GhostRef) instead of simple update_forward_refs(Model) 4. Using non-quoted references by creating new references without must_import_after_current_declaration flag This ensures ghost references are properly imported and referenced in update_forward_refs calls. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
- python-sdk: 4.35.3 -> 4.35.4 - pydantic: 1.9.1 -> 1.9.2 - fastapi: 1.11.1 -> 1.11.2 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
Resolved version conflict in sdk/versions.yml by bumping to 4.36.1 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
tjb9dc
commented
Nov 12, 2025
| from pydantic import ValidationError | ||
| from seed import Acai | ||
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| def test_recursive_model(): |
aditya-arolkar-swe
approved these changes
Nov 12, 2025
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Summary
Fixes PydanticUserError for mutually recursive models in Pydantic v2 by properly handling
self-referential union member ghost references.
Changes
- Track them separately in FernAwarePydanticModel
- Generate update_forward_refs(Model, GhostRef=GhostRef) instead of simple
update_forward_refs(Model)
- Create non-quoted references by removing must_import_after_current_declaration flag
Example
Before:
After: