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Order relationship rows in the model export - #457
POST /api/model/export ordered catalog rows, terms, attributes and SQL owners, but _export_foreign_keys, _export_joins and _export_semantic_fks were SELECT DISTINCT with no ORDER BY. Postgres satisfies those with a hash aggregate, so the three lists came back in heap/bucket order: two exports of an unchanged catalog could differ, putting noise in the YAML diff and drifting the SHA-256 that skills/nvidia-ontology-management/references/publication.md tells operators to keep as the rollback artifact. The existing World fixture has exactly one of each relationship, which is why no test caught it.
Change
auto_ontology/dal/model_interchange.py:
foreign keys → ORDER BY source_column_id, target_column_id
joins → ORDER BY source_table_id, target_table_id
semantic FKs → ORDER BY column_id, attribute_id
terms / SQL attributes / custom analyses: add .id as a tie-breaker after .name, matching fetch_all_terms in dal/terms.py.
No behaviour change beyond row order; the importer is order-independent.
Verification
New test_relationships_export_in_a_stable_order in auto_ontology/dal/tests/test_model_interchange.py: inserts three extra FKs, joins and semantic FKs in descending key order, asserts each exported list equals its sorted form and that a second export is identical. Against a Postgres 17 instance it fails on main 5/5 runs and passes with this change.
POST /api/model/export sorted catalog rows, terms, attributes and SQL
owners, but the foreign-key, join and semantic-FK queries were SELECT
DISTINCT with no ORDER BY. Postgres satisfies those with a hash aggregate,
so the three lists came back in heap/bucket order: two exports of an
unchanged catalog could differ, which puts noise in the YAML diff and
drifts the SHA-256 the publication guide tells operators to keep as the
rollback artifact.
Order each by its natural key, and add an id tie-breaker to the queries
that sorted by name alone, matching fetch_all_terms. The new test inserts
several of each relationship in descending key order and checks the export
comes back sorted and identical on a second run; it fails on main.
FixesNVIDIA#443
Model export queries now use ID-based sort keys for relationships and for name-ordered terms, SQL attributes, and custom analyses. A regression test checks relationship ordering and confirms that repeated exports of an unchanged catalog produce identical documents.
Changes: Stable model export ordering
Layer / File(s)
Summary
Order exported model data auto_ontology/dal/model_interchange.py, auto_ontology/dal/tests/test_model_interchange.py
Foreign keys, joins, and semantic foreign keys use ID-based ordering. Terms, SQL attributes, and custom analyses use IDs as tie-breakers after names. The test checks relationship ordering and repeated export consistency.
The export-ordering change is ready to merge after normal checks.
Pre-merge checks: 5 · 1
Failed checks: 1 warning
Check name
Status
Explanation
Resolution
Tests For Backend Behaviour Changes
The PR changes export ordering but adds no tests under auto_ontology/tests or dev_tools. The new test is under auto_ontology/dal/tests, outside the required paths. The PR does not explain why a …
Add or update a test under auto_ontology/tests or dev_tools, or explain why a test is impractical.
Passed checks: 5 passed
Check name
Status
Explanation
Description Check
Check skipped - CodeRabbit’s high-level summary is enabled.
Title check
The title is concise and imperative. It describes the relationship export ordering changes.
Linked Issues check
[#443] Export queries order foreign keys, joins, and semantic foreign keys by their ID pairs. Terms, SQL attributes, and custom analyses use IDs as name tie-breakers. A test checks relationship order …
Out of Scope Changes check
[#443] The query changes and relationship-order test support deterministic exports. The summary identifies no unrelated changes.
Migration Accompanies Schema Change
The PR does not modify auto_ontology/dal/schema.py. No Alembic revision is required by this check.
Full details: Linked Issues check
Explanation
[#443] Export queries order foreign keys, joins, and semantic foreign keys by their ID pairs. Terms, SQL attributes, and custom analyses use IDs as name tie-breakers. A test checks relationship order and repeated exports.
Full details: Tests For Backend Behaviour Changes
Explanation
The PR changes export ordering but adds no tests under auto_ontology/tests or dev_tools. The new test is under auto_ontology/dal/tests, outside the required paths. The PR does not explain why a test is impractical.
Resolution
Add or update a test under auto_ontology/tests or dev_tools, or explain why a test is impractical.
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Generate unit tests (beta)
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Failed pre-merge checks:
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Add or update a test under `auto_ontology/tests` or `dev_tools`, or explain why
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auto_ontology/dal/model_interchange.py
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Fixes #443
Problem
POST /api/model/exportordered catalog rows, terms, attributes and SQL owners, but_export_foreign_keys,_export_joinsand_export_semantic_fkswereSELECT DISTINCTwith noORDER BY. Postgres satisfies those with a hash aggregate, so the three lists came back in heap/bucket order: two exports of an unchanged catalog could differ, putting noise in the YAML diff and drifting the SHA-256 thatskills/nvidia-ontology-management/references/publication.mdtells operators to keep as the rollback artifact. The existingWorldfixture has exactly one of each relationship, which is why no test caught it.Change
auto_ontology/dal/model_interchange.py:ORDER BY source_column_id, target_column_idORDER BY source_table_id, target_table_idORDER BY column_id, attribute_id.idas a tie-breaker after.name, matchingfetch_all_termsindal/terms.py.No behaviour change beyond row order; the importer is order-independent.
Verification
test_relationships_export_in_a_stable_orderinauto_ontology/dal/tests/test_model_interchange.py: inserts three extra FKs, joins and semantic FKs in descending key order, asserts each exported list equals its sorted form and that a second export is identical. Against a Postgres 17 instance it fails onmain5/5 runs and passes with this change.uv run pytest auto_ontology/dal/tests/test_model_interchange.py auto_ontology/server/model_interchange -q→ 55 passed (live Postgres).ruff check/ruff format --checkclean.Summary by CodeRabbit