Fix regression when an exposure references a deprecated model

.changes/unreleased/Fixes-20241024-104938.yaml

@@ -0,0 +1,6 @@
+kind: Fixes
+body: Fix bug when referencing deprecated models
+time: 2024-10-24T10:49:38.352328-06:00
+custom:
+  Author: dbeatty10 danlsn
+  Issue: "10915"

core/dbt/parser/manifest.py

@@ -590,7 +590,7 @@
                 # Get the child_nodes and check for deprecations.
                 child_nodes = self.manifest.child_map[node.unique_id]
                 for child_unique_id in child_nodes:
-                    child_node = self.manifest.nodes[child_unique_id]
+                    child_node = self.manifest.nodes.get(child_unique_id)
                     if not isinstance(child_node, ModelNode):
                         continue
                     if node.is_past_deprecation_date:

tests/functional/deprecations/fixtures.py

@@ -30,6 +30,23 @@
       email: [email protected]
 """
 
+
+deprecated_model_exposure_yaml = """
+version: 2
+
+models:
+  - name: model
+    deprecation_date: 1999-01-01 00:00:00.00+00:00
+
+exposures:
+  - name: simple_exposure
+    type: dashboard
+    depends_on:
+      - ref('model')
+    owner:
+      email: [email protected]
+"""
+
 # deprecated test config fixtures
 data_tests_yaml = """
 models:

tests/functional/deprecations/test_deprecations.py

@@ -7,6 +7,7 @@
 from dbt_common.exceptions import EventCompilationError
 from tests.functional.deprecations.fixtures import (
     bad_name_yaml,
+    deprecated_model_exposure_yaml,
     models_trivial__model_sql,
 )
 
@@ -99,6 +100,18 @@ def test_package_redirect_fail(self, project):
         assert expected_msg in exc_str
 
 
+class TestDeprecatedModelExposure:
+    @pytest.fixture(scope="class")
+    def models(self):
+        return {
+            "model.sql": models_trivial__model_sql,
+            "exposure.yml": deprecated_model_exposure_yaml,
+        }
+
+    def test_exposure_with_deprecated_model(self, project):
+        run_dbt(["parse"])
+
+
 class TestExposureNameDeprecation:
     @pytest.fixture(scope="class")
     def models(self):