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roboco/docs/backend/services/sqlalchemy-uuid-casts.md
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f03859c64c [4cfd99c2] Backend: docs-divergence engine, feature flag, release seam, and compose wiring (#507) (#513)
* [fe5c049b] Register docs-sync feature flag and compose wiring (#505)

* [fe5c049b] Register docs-sync feature flag and compose wiring

* [fe5c049b] feat(config): wire ROBOCO_DOCS_SYNC_ENABLED flag and compose defaults

* [fe5c049b] docs(config): document ROBOCO_DOCS_SYNC_ENABLED flag and compose defaults

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* [687574d2] Implement docs-sync engine and release-proposal seam (#506)

* [687574d2] Add docs-sync engine and release-proposal publish seam

* [687574d2] Restore task.py safeguards deleted by docs-sync engine commit and filter docs_sync version in SQL

* [687574d2] docs(map): add engine-docs-sync architecture map and cross-references

* [687574d2] docs(config): update docs-sync flag, cap settings, and changelog entry

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* [3e7cd5a8] Fix task.py regressions from docs-sync PR (#509)

* [3e7cd5a8] fix(task): restore deleted auditor alerts and revert descendant cast form in task.py

* [3e7cd5a8] docs(task-service): restore auditor alerts and cast notes in map and changelog

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* [e6e23c1f] Enforce docs_sync_max_per_cycle cap in docs_sync_engine.py (#510)

* [e6e23c1f] Enforce docs_sync_max_per_cycle cap in DocsSyncEngine

* [e6e23c1f] docs(docs-sync): document docs_sync_max_per_cycle enforcement in engine map, README, and docstring

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* [e4b7dd0f] Revert task.py cast regressions from docs-sync PR (#511)

* [e4b7dd0f] fix(task): revert cast regressions in supersede and descendants

* [e4b7dd0f] docs(map): correct PR #511 cast regression entry in task-service slice map

* [e4b7dd0f] docs(backend): add SQLAlchemy UUID cast pattern note and inline comments in task.py

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* [1fdfe711] Fix Python quality gate on docs-sync PR (#512)

* [1fdfe711] Fix ruff formatting in task.py and add coverage tests for docs-sync surface

* [1fdfe711] fix(task): use generic JSON .as_string() accessor in list_open_docs_sync_tasks and correct test patch targets

* [1fdfe711] docs(task-service): record docs-sync JSON accessor fix and list_open_docs_sync_tasks map entry

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Co-authored-by: Backend Developer 1 <be-dev-1@roboco.tech>
Co-authored-by: Backend Documenter <be-doc@roboco.tech>
Co-authored-by: Backend Developer 2 <be-dev-2@roboco.tech>
2026-07-14 02:22:37 +02:00

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SQLAlchemy Mapped[UUID] cast convention

When casting SQLAlchemy Mapped[UUID] primary-key columns to the runtime uuid.UUID type for typing purposes, use the string-literal form:

cast('UUID', child.id)

not the runtime symbol form:

cast(UUID, child.id)  # noqa: TC006

Why

  • Mapped[UUID] resolves to uuid.UUID at runtime, but static checkers need the cast target.
  • The string-literal form avoids importing UUID solely to pass it to typing.cast, which ruff's TC006 rule flags as a typing-only import used at runtime.
  • It also avoids # noqa or # type: ignore suppressions.

Where we use it

  • roboco/services/task.py:_supersede_replacement_landed — descendant traversal.
  • roboco/services/task.py:get_all_descendants — descendant traversal.