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evanvolgas:fix/graph-selector-dbt-loom-external-nodes
Feb 23, 2026
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Improve comments on #2389#2394
tatiana merged 7 commits into
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evanvolgas:fix/graph-selector-dbt-loom-external-nodes

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@tatiana Hello! @award1230 is my coworker. He opened #2389. Alex is out on vacation without access to his computer until Mar 1st. I saw your note that his code might go in tomorrow, and I'm hoping it's not too late (also, agreed with @tatiana : Nice work @alex1230, and thanks for jumping right straight to a PR!)

Per Alex's PR:

When using dbt-loom for cross-project references, external nodes are filtered out during manifest loading (they have no file path). However, local nodes may still have depends_on entries pointing to these external nodes.

The + graph operator triggers select_node_precursors which traverses depends_on entries, and when it encounters these external node IDs that were filtered out, it raises a KeyError.

Original fix by @award1230 in #2389

Description

This fix adds bounds checks in two locations in cosmos/dbt/selector.py:

  1. GraphSelector.select_node_precursors: Skip node IDs not present in the nodes dict during upstream traversal
  2. NodeSelector.select_nodes_ids_by_intersection: Skip external node IDs that were collected during graph traversal but don't exist in the nodes dict

This allows the + traversal to gracefully stop at project boundaries, which is the correct behavior for cross-project setups where external dependencies are managed by their own DAGs/task groups.

Checklist

  • [ x ] I have made corresponding changes to the documentation (if required)
  • [ x ] I have added tests that prove my fix is effective or that my feature works

…ternal nodes

When using dbt-loom for cross-project references, external nodes are filtered
out during manifest loading (they have no file path). However, local nodes
may still have depends_on entries pointing to these external nodes.

The + graph operator triggers select_node_precursors which traverses depends_on
entries, and when it encounters these external node IDs that were filtered out,
it raises a KeyError.

This fix adds bounds checks in two locations in cosmos/dbt/selector.py:

1. GraphSelector.select_node_precursors: Skip node IDs not present in the
   nodes dict during upstream traversal
2. NodeSelector.select_nodes_ids_by_intersection: Skip external node IDs that
   were collected during graph traversal but don't exist in the nodes dict

This allows the + traversal to gracefully stop at project boundaries, which
is the correct behavior for cross-project setups where external dependencies
are managed by their own DAGs/task groups.

Original fix by @award1230 in astronomer#2389

Co-Authored-By: award1230 <26311596+award1230@users.noreply.github.com>
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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codecov Bot commented Feb 23, 2026

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.96%. Comparing base (4d86173) to head (5bf236e).
⚠️ Report is 2 commits behind head on main.

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##             main    #2394   +/-   ##
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@tatiana tatiana changed the title Fix KeyError in graph selector when using + operator with dbt-loom external nodes Improve comments on #2389 Feb 23, 2026
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Looks grat, thanks a lot for the initiative and improving the code maintainability, @evanvolgas !

@tatiana tatiana merged commit 78a4358 into astronomer:main Feb 23, 2026
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tatiana pushed a commit that referenced this pull request Feb 23, 2026
Address the feedback from the #2389 code review to help maintain the code in the future.

(cherry picked from commit 78a4358)
@tatiana tatiana mentioned this pull request Feb 23, 2026
@tatiana tatiana modified the milestones: Cosmos 1.13.1, Cosmos 1.14.0 Feb 24, 2026
tatiana added a commit that referenced this pull request Feb 25, 2026
**Enhancements**

* Change Snowflake profile mappings to default to four threads by
@tatiana in #2374
* Refactor to avoid potential future ``UnboundLocalError`` for
``producer_task`` in ``calculate_tasks_map`` by @rin in #2309

**Bug Fixes**

* Fix graph selector when using + selector with ``dbt-loom`` by
@award1230 in #2389
* Populate ``compiled_sql`` for ``InvocationMode.SUBPROCESS`` in
``ExecutionMode.WATCHER`` by @pankajkoti in #2319
* Preserve ``extra_context`` for watcher consumer task instances by
@pankajkoti in #2381
* Fix watcher: respect ``deferrable=False`` from ``operator_args`` on
consumer sensor by @pankajkoti in #2384
* Error handle invalid YAML with ``LoadMode.DBT_MANIFEST`` and
``RenderConfig.selector`` by @jonbillings in #2316
* Fix selecting model when it has the same name as folder by
@pankajastro in #2328
* Handle Param Validation errors by @tatiana in #2358
* Fix cache swap issue by @jonbillings in #2332
* Fix leaked semaphore warnings in Airflow 3 by resetting dbt adapters
by @pankajkoti in #2335

**Docs**

* Document ``ExecutionMode.KUBERNETES`` limitations by @tatiana in #2326

**Others**

* Add .airflow-registry.yaml for Airflow Provider Registry by @kaxil in
#2387
* Improve test coverage for PR #2307 by @tatiana in #2308
* Address feedback from code review #2389 by @evanvolgas in #2394

Closes:
astronomer/oss-integrations-private#333
@tatiana tatiana mentioned this pull request Feb 25, 2026
tatiana added a commit that referenced this pull request Feb 25, 2026
Enhancements

* Change Snowflake profile mappings to default to four threads by
@tatiana in #2374
* Refactor to avoid potential future ``UnboundLocalError`` for
``producer_task`` in ``calculate_tasks_map`` by @rin in #2309

Bug Fixes

* Fix graph selector when using + selector with ``dbt-loom`` by
@award1230 in #2389
* Populate ``compiled_sql`` for ``InvocationMode.SUBPROCESS`` in
``ExecutionMode.WATCHER`` by @pankajkoti in #2319
* Preserve ``extra_context`` for watcher consumer task instances by
@pankajkoti in #2381
* Fix watcher: respect ``deferrable=False`` from ``operator_args`` on
consumer sensor by @pankajkoti in #2384
* Error handle invalid YAML with ``LoadMode.DBT_MANIFEST`` and
``RenderConfig.selector`` by @YourRoyalLinus in #2316
* Fix selecting model when it has the same name as folder by
@pankajastro in #2328
* Handle Param Validation errors by @tatiana in #2358
* Fix cache swap issue by @YourRoyalLinus in #2332
* Fix leaked semaphore warnings in Airflow 3 by resetting dbt adapters
by @pankajkoti in #2335

Docs

* Document ``ExecutionMode.KUBERNETES`` limitations by @tatiana in #2326

Others

* Add .airflow-registry.yaml for Airflow Provider Registry by @kaxil in
#2387
* Improve test coverage for PR #2307 by @tatiana in #2308
* Address feedback from code review #2389 by @evanvolgas in #2394

Additional details on this change:
- The actual release was done from branch 1.13:
https://github.com/astronomer/astronomer-cosmos/releases/tag/astronomer-cosmos-v1.13.1
- This PR aims to update our CHANGELOG, and allow us to give credit to
the username that was being questioned by codespell
@pankajastro pankajastro mentioned this pull request Mar 16, 2026
pankajastro added a commit that referenced this pull request Apr 7, 2026
1.14.0 (2026-04-07)
---------------------

Breaking Changes

* Drop support for Airflow versions earlier than **2.9** by
@jedcunningham in #2288
* Fix inclusion of package models and selection/exclusion behavior by
@pankajkoti in #2357
* ``ExecutionMode.WATCHER``: The per-node ``*_status`` XCom value is now
a dict (``{"status": "<status>", "outlet_uris": [...]}``) instead of a
plain string. Any custom code that reads these internal XCom keys
directly will need to be updated by @pankajkoti in #2507

Features

* Add cluster policy support for ``ExecutionMode.WATCHER`` sensor
retries by @astro-anand in #2293
* Add debug mode to track memory utilization by @tatiana in #2327
* Add FQN selection support for ``LoadMode.DBT_MANIFEST`` by
@pankajastro in #2375
* Introduce interceptors for Cosmos tasks by @tatiana in #2419
* Add config to allow disabling dag versioning by @pankajkoti in #2470
* Implement TaskGroups by models folder by @maximilianoarcieri and
@tatiana in #1566, #2469, and #2420
* feat: implement DbtTestWatcherOperator by @michal-mrazek in #2447
* Add source freshness aware execution for ``ExecutionMode.WATCHER`` by
@pankajastro and @tatiana in #2467

* Note: Like ``ExecutionMode.WATCHER``, this feature is experimental and
its interface and implementation can change in the future.
* Add Airflow 3.2 support by @pankajastro and @pankajkoti in #2472

Enhancements

* Add watcher mode support for dbt test node states by @michal-mrazek in
#2318
* Rename watcher-mode sensor retry queue and reuse it for producer tasks
by @pankajastro in #2331
* Fix leaked semaphore warnings in Airflow 3 by resetting dbt adapters
by @pankajkoti in #2335
* Improve dbt Fusion support and related tests by @tatiana in #2356
* Default Snowflake profile mappings to four threads by @tatiana in
#2374
* Attempt to remove Pydantic as a dependency by @tatiana in #2377
* Log dbt-core and adapter versions in watcher consumer tasks by
@pankajastro in #2412
* Log model errors in watcher consumer on dbt node failure by
@pankajastro in #2431
* Reduce XCom read/write for tracking node state and errors in
ConsumerWatcher task by @pankajastro in #2471
* Remove duplicate debug log in watcher subprocess path by @tatiana in
#2494
* Simplify and unify WATCHER implementation regardless of InvocationMode
by @tatiana in #2498
* Switch to lazy imports in cosmos/__init__.py by @pankajkoti in #2531

Bug Fixes

* Handle invalid YAML errors with ``LoadMode.DBT_MANIFEST`` and
``RenderConfig.selector`` by @YourRoyalLinus in #2316
* Populate ``compiled_sql`` for ``InvocationMode.SUBPROCESS`` in
``ExecutionMode.WATCHER`` by @pankajkoti in #2319
* Fix select/exclude type mismatch by @tatiana in #2364
* Set ``emit_datasets=False`` for ``DbtTest*`` operators by @pankajastro
in #2365
* Set correct queue priority for watcher producer tasks by @pankajastro
in #2372
* Preserve ``extra_context`` for watcher consumer task instances by
@pankajkoti in #2381
* Respect ``deferrable=False`` from ``operator_args`` on watcher
consumer sensors by @pankajkoti in #2384
* Fix watcher queue precedence and add documentation by @pankajastro in
#2391
* Do not set ``compiled_sql`` on ``ExecutionMode.WATCHER`` producers by
@pankajkoti in #2440
* Remove const attribute for ``__cosmos_telemetry_metadata__`` dag param
by @pankajkoti in #2466
* Remove timeout override from Cosmos watcher sensors by @tatiana and
@claude in #2478
* Remove forced ``retries=0`` from watcher producer operators by
@tatiana in #2479
* RFC: Add patch for newer versions of amazon provider when running dbt
on EKS by @aoelvp94 in #2481
* Fix ``cosmos_debug_max_memory_mb`` XCom not pushed in Watcher sensor
tasks by @tatiana in #2503
* Fix ``TestBehavior.NONE`` and ``TestBehavior.AFTER_ALL`` exclude
ignored with selectors in ``ExecutionMode.WATCHER`` by @pankajkoti in
#2511
* Move dataset emission for ``ExecutionMode.WATCHER`` from producer to
consumer sensors by @pankajkoti in #2507

Docs

* Document cluster policy configuration for ``ExecutionMode.WATCHER``
sensor tasks by @pankajastro in #2315
* Remove outdated docs for the dbt docs plugin with Airflow 3 by
@pankajastro in #2353
* Make Watcher DBT Execution Queue heading clickable by @pankajastro in
#2354
* Update ``ExecutionMode.WATCHER`` documentation regarding test node
implementation by @jroachgolf84 in #2355
* Fix ``pre_dbt_fusion`` configuration rendering by @pankajastro in
#2369
* Add documentation for including/excluding nodes based on FQN by
@pankajastro in #2371
* Update watcher execution mode documentation by @tatiana in #2380
* Add documentation for ``DbtSeedLocalOperator`` by @jroachgolf84 in
#2383
* Fix miscellaneous Sphinx warnings by @pankajastro in #2395
* Improve contributing documentation by @lzdanski in #2397
* Add **Get Started in 5 Minutes** guide by @lzdanski in #2398
* Add Sphinx redirects package for documentation redirects by @lzdanski
in #2407
* Restructure **Getting Started** and **Guides** sections by @lzdanski
in #2418
* Add open-source quickstart by @lzdanski in #2439
* Fix documentation redirects by @lzdanski in #2442
* Restructure and refactor reference documentation by @lzdanski in #2443
* Add execution modes decision documentation by @lzdanski in #2444
* Add **Core Concepts** page to Getting Started by @lzdanski in #2448
* Add guide: *How Cosmos Works* by @lzdanski in #2449
* Update **Getting Started** overview and index pages by @lzdanski in
#2452
* Add guide: *How Cosmos Runs dbt* by @lzdanski in #2453
* Fix miscellaneous documentation links by @lzdanski in #2454
* Add Mermaid diagrams and execution mode diagrams by @lzdanski and
@tatiana in #2459
* Add documentation for memory optimization options by @pankajastro in
#2340
* Fix typo in watcher execution mode docs by @evanvolgas in #2485
* Fix minor documentation issues by @evanvolgas in #2489
* Add troubleshooting note for dbt debug logs in ExecutionMode.WATCHER
by @tatiana in #2491
* docs: unify RST header styles across documentation by @jigangz in
#2473
* docs: fix env var for rich logging by @vricciardulli in #2514
* docs: update dbt project path example for Airflow 3 Astro
compatibility by @yeoreums in #2512
* Document missing Cosmos Airflow config settings in cosmos-conf.rst by
@tatiana in #2515
* Split security-privacy policy doc and add dependency cooldown by
@pankajkoti in #2519
* Add performance optimization and troubleshooting docs by @pankajkoti
in #2521
* Update copyright year to 2026 by @tayloramurphy in #2527
* docs: Updating "Project Policies" to "Policies" in menu bar by
@jroachgolf84 in #2526

Others

* Fix tests after removing support for Airflow versions earlier than 2.9
by @tatiana in #2321
* Enable listener tests for Airflow 3.1 by @pankajastro in #2348
* Accept ``int`` or ``float`` for ``cosmos_debug_max_memory_mb`` in
integration tests by @pankajkoti in #2352
* Update ``CODEOWNERS`` to prioritize ``oss-integrations`` by @tatiana
in #2359
* Fix automatic reviewer assignment in GitHub by @tatiana and @phanikumv
in #2360
* Improve PyPI tagging by @tatiana in #2363
* Add integration tests for dbt Fusion and ``ExecutionMode.WATCHER`` by
@tatiana in #2373
* Fix Zizmor check by @tatiana in #2376
* Remove ``methodtools`` dependency by @tatiana in #2378
* Improve comments on #2389 by @evanvolgas in #2394
* Refactor ``load_from_dbt_manifest`` to reduce code complexity by
@pankajkoti in #2399
* Refactor ``_handle_no_precursors_or_descendants`` to reduce complexity
by @pankajkoti in #2400
* Improve issue templates by @tatiana in #2401
* Avoid running tests when only docs change by @tatiana in #2402
* Add ``no-reload`` target for serving docs locally by @pankajkoti in
#2405
* Fix test hash checks on macOS by @tatiana in #2406
* Attempt deterministic dbt project copy in test fixtures by @pankajkoti
in #2409
* Pin ``virtualenv <21`` due to hatch incompatibility in CI by
@pankajkoti in #2410
* Revert virtualenv pin for hatch installation in CI by @pankajkoti in
#2426
* Add version comments for commit SHA pinned GitHub Actions by
@pankajkoti in #2436
* Fix ``hatch run docs:build`` issues by @tatiana in #2437
* Minor code improvements by @dnskr in #2446
* Pre-commit autoupdate by @pre-commit-ci in #2367, #2396, #2422, #2451,
#2468, #2495, and #2516
* Add file to support Claude understanding the Cosmos repository by
@tatiana in #2458
* Dependency updates by @dependabot in #2368, #2425, #2435, #2465,
#2475, #2504, #2518, and #2528
* Isolate Scarf telemetry integration test into its own CI job by
@pankajkoti and @claude in #2477
* ci: upgrade Airflow version to 3.1 in MyPy type-check job by @yeoreums
in #2506
* Add commit message guidelines to CLAUDE.md by @pankajkoti in #2509
* Extend skipping tests in CI for more non-code file changes by
@pankajkoti in #2510
* Add Dependabot pre-commit support with 7-day cooldown by @pankajkoti
in #2517
* Enforce zero warnings policy for documentation by @dnskr in #2513

Co-authored-by: Pankaj Koti <pankajkoti699@gmail.com>
Co-authored-by: Tatiana Al-Chueyr <tatiana.alchueyr@gmail.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Pankaj Koti <pankajkoti699@gmail.com>
Co-authored-by: Tatiana Al-Chueyr <tatiana.alchueyr@gmail.com>
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