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feat: add optimistic concurrency guards for draft editor, pricing and publish flows

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add optimistic concurrency guards via expected scheme version id

protect draft editor, pricing snapshot, remap and publish flows from stale mutations
protect version creation from stale current version state

keep backward compatibility with optional query guards

verify 409 conflict behavior for stale clients and 200 for valid flows
This commit is contained in:
greebo
2026-03-19 18:58:03 +03:00
parent 76710372c4
commit c7c9184a71
8 changed files with 410 additions and 70 deletions
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24
backend/app/api/routes/publish.py
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@@ -22,9 +22,13 @@ router = APIRouter()
@router.post(f"{settings.api_v1_prefix}/schemes/{{scheme_id}}/draft/pricing/snapshot")
async def create_draft_pricing_snapshot(
scheme_id: str,
expected_scheme_version_id: str | None = Query(default=None),
role: str = Depends(require_api_key),
):
scheme, version = await get_current_draft_context(scheme_id)
scheme, version = await get_current_draft_context(
scheme_id=scheme_id,
expected_scheme_version_id=expected_scheme_version_id,
)
result = await replace_scheme_version_pricing_snapshot(
scheme_id=scheme.scheme_id,
scheme_version_id=version.scheme_version_id,
@@ -50,9 +54,13 @@ async def get_publish_preview(
scheme_id: str,
baseline_scheme_version_id: str | None = Query(default=None),
refresh: bool = Query(default=False),
expected_scheme_version_id: str | None = Query(default=None),
role: str = Depends(require_api_key),
):
scheme, version = await get_current_draft_context(scheme_id)
scheme, version = await get_current_draft_context(
scheme_id=scheme_id,
expected_scheme_version_id=expected_scheme_version_id,
)
bundle = await get_or_build_publish_preview_bundle(
scheme_id=scheme.scheme_id,
scheme_version_id=version.scheme_version_id,
@@ -74,9 +82,13 @@ async def get_publish_preview(
async def preview_draft_remap(
scheme_id: str,
payload: RemapPreviewRequest,
expected_scheme_version_id: str | None = Query(default=None),
role: str = Depends(require_api_key),
):
scheme, version = await get_current_draft_context(scheme_id)
scheme, version = await get_current_draft_context(
scheme_id=scheme_id,
expected_scheme_version_id=expected_scheme_version_id,
)
items = await preview_remap(
scheme_version_id=version.scheme_version_id,
seat_record_ids=payload.seat_record_ids,
@@ -98,9 +110,13 @@ async def preview_draft_remap(
async def apply_draft_remap(
scheme_id: str,
payload: RemapApplyRequest,
expected_scheme_version_id: str | None = Query(default=None),
role: str = Depends(require_api_key),
):
scheme, version = await get_current_draft_context(scheme_id)
scheme, version = await get_current_draft_context(
scheme_id=scheme_id,
expected_scheme_version_id=expected_scheme_version_id,
)
items = await apply_remap(
scheme_version_id=version.scheme_version_id,
seat_record_ids=payload.seat_record_ids,