Fix: Deserialization of the incremental unmanaged model kind

Author: izeigerman

sqlmesh/core/model/kind.py

@@ -120,6 +120,8 @@ def _model_kind_validator(v: t.Any) -> ModelKind:
                     klass = IncrementalByTimeRangeKind
                 elif v.get("name") == ModelKindName.INCREMENTAL_BY_UNIQUE_KEY:
                     klass = IncrementalByUniqueKeyKind
+                elif v.get("name") == ModelKindName.INCREMENTAL_UNMANAGED:
+                    klass = IncrementalUnmanagedKind
                 elif v.get("name") == ModelKindName.SEED:
                     klass = SeedKind
                 elif v.get("name") == ModelKindName.VIEW:

sqlmesh/dbt/model.py

@@ -191,7 +191,9 @@ def model_kind(self, target: TargetConfig) -> ModelKind:
             strategy = self.incremental_strategy or target.default_incremental_strategy(
                 IncrementalUnmanagedKind
             )
-            return IncrementalUnmanagedKind(insert_overwrite=strategy == "insert_overwrite")
+            return IncrementalUnmanagedKind(
+                insert_overwrite=strategy in INCREMENTAL_BY_TIME_STRATEGIES
+            )
         if materialization == Materialization.EPHEMERAL:
             return ModelKind(name=ModelKindName.EMBEDDED)
         raise ConfigError(f"{materialization.value} materialization not supported.")

tests/dbt/test_transformation.py

@@ -97,8 +97,14 @@ def test_model_kind():
         partition_by={"field": "bar"},
     ).model_kind(target) == IncrementalUnmanagedKind(insert_overwrite=True)
 
+    assert ModelConfig(materialized=Materialization.INCREMENTAL).model_kind(
+        target
+    ) == IncrementalUnmanagedKind(insert_overwrite=True)
+
     assert (
-        ModelConfig(materialized=Materialization.INCREMENTAL).model_kind(target)
+        ModelConfig(
+            materialized=Materialization.INCREMENTAL, incremental_strategy="append"
+        ).model_kind(target)
         == IncrementalUnmanagedKind()
     )