fix(ingest/tableau): make sites.get_by_id call optional

metadata-ingestion/src/datahub/ingestion/source/tableau/tableau.py

@@ -68,6 +68,7 @@
     CapabilityReport,
     MetadataWorkUnitProcessor,
     Source,
+    StructuredLogLevel,
     TestableSource,
     TestConnectionReport,
 )
@@ -700,18 +701,27 @@ def get_workunits_internal(self) -> Iterable[MetadataWorkUnit]:
                         config=self.config,
                         ctx=self.ctx,
                         site=site,
+                        site_id=site.id,
                         report=self.report,
                         server=self.server,
                         platform=self.platform,
                     )
                     logger.info(f"Ingesting assets of site '{site.content_url}'.")
                     yield from site_source.ingest_tableau_site()
             else:
-                site = self.server.sites.get_by_id(self.server.site_id)
+                site = None
+                with self.report.report_exc(
+                    title="Unable to fetch site details. Site hierarchy may be incomplete and external urls may be missing.",
+                    message="This usually indicates missing permissions. Ensure that you have all necessary permissions.",
+                    level=StructuredLogLevel.WARN,
+                ):
+                    site = self.server.sites.get_by_id(self.server.site_id)
+
                 site_source = TableauSiteSource(
                     config=self.config,
                     ctx=self.ctx,
                     site=site,
+                    site_id=self.server.site_id,
                     report=self.report,
                     server=self.server,
                     platform=self.platform,
@@ -743,7 +753,8 @@ def __init__(
         self,
         config: TableauConfig,
         ctx: PipelineContext,
-        site: SiteItem,
+        site: Optional[SiteItem],
+        site_id: Optional[str],
         report: TableauSourceReport,
         server: Server,
         platform: str,
@@ -752,9 +763,16 @@ def __init__(
         self.report = report
         self.server: Server = server
         self.ctx: PipelineContext = ctx
-        self.site: SiteItem = site
         self.platform = platform
 
+        self.site: Optional[SiteItem] = site
+        if site_id is not None:
+            self.site_id: str = site_id
+        else:
+            assert self.site is not None, "site or site_id is required"
+            assert self.site.id is not None, "site_id is required when site is provided"
+            self.site_id = self.site.id
+
         self.database_tables: Dict[str, DatabaseTable] = {}
         self.tableau_stat_registry: Dict[str, UsageStat] = {}
         self.tableau_project_registry: Dict[str, TableauProject] = {}
@@ -808,7 +826,7 @@ def dataset_browse_prefix(self) -> str:
     def _re_authenticate(self):
         tableau_auth: Union[
             TableauAuth, PersonalAccessTokenAuth
-        ] = self.config.get_tableau_auth(self.site.content_url)
+        ] = self.config.get_tableau_auth(self.site_id)
         self.server.auth.sign_in(tableau_auth)
 
     @property
@@ -3181,10 +3199,10 @@ def emit_project_in_topological_order(
             else:
                 # This is a root Tableau project since the parent_project_id is None.
                 # For a root project, either the site is the parent, or the platform is the default parent.
-                if self.config.add_site_container and self.site and self.site.id:
+                if self.config.add_site_container:
                     # The site containers have already been generated by emit_site_container, so we
                     # don't need to emit them again here.
-                    parent_project_key = self.gen_site_key(self.site.id)
+                    parent_project_key = self.gen_site_key(self.site_id)
 
             yield from gen_containers(
                 container_key=project_key,
@@ -3201,12 +3219,12 @@ def emit_project_in_topological_order(
             yield from emit_project_in_topological_order(project)
 
     def emit_site_container(self):
-        if not self.site or not self.site.id:
+        if not self.site:
             logger.warning("Can not ingest site container. No site information found.")
             return
 
         yield from gen_containers(
-            container_key=self.gen_site_key(self.site.id),
+            container_key=self.gen_site_key(self.site_id),
             name=self.site.name or "Default",
             sub_types=[c.SITE],
         )

metadata-ingestion/tests/integration/tableau/test_tableau_ingest.py

@@ -1028,6 +1028,7 @@ def check_lineage_metadata(
         ctx=context,
         platform="tableau",
         site=SiteItem(name="Site 1", content_url="site1"),
+        site_id="site1",
         report=TableauSourceReport(),
         server=Server("https://test-tableau-server.com"),
     )
@@ -1248,6 +1249,7 @@ def test_permission_mode_switched_error(pytestconfig, tmp_path, mock_datahub_gra
                 config=mock.MagicMock(),
                 ctx=mock.MagicMock(),
                 site=mock.MagicMock(),
+                site_id=None,
                 server=mock_sdk.return_value,
                 report=reporter,
             )