[exploration] unexecutable assets not backed by jobs

python_modules/dagster-graphql/dagster_graphql/schema/asset_graph.py

@@ -455,8 +455,8 @@ def get_required_resource_keys_rec(
     def is_graph_backed_asset(self) -> bool:
         return self.graphName is not None
 
-    def is_source_asset(self) -> bool:
-        return self._external_asset_node.is_source
+    def is_source_or_defined_in_unexecutable_assets_def(self) -> bool:
+        return self._external_asset_node.is_source or not self._external_asset_node.is_executable
 
     def resolve_hasMaterializePermission(
         self,
@@ -581,7 +581,7 @@ def resolve_assetObservations(
         ]
 
     def resolve_configField(self, _graphene_info: ResolveInfo) -> Optional[GrapheneConfigTypeField]:
-        if self.is_source_asset():
+        if self.is_source_or_defined_in_unexecutable_assets_def():
             return None
         external_pipeline = self.get_external_job()
         node_def_snap = self.get_node_definition_snap()
@@ -814,7 +814,7 @@ def resolve_jobs(self, _graphene_info: ResolveInfo) -> Sequence[GraphenePipeline
         ]
 
     def resolve_isSource(self, _graphene_info: ResolveInfo) -> bool:
-        return self.is_source_asset()
+        return self._external_asset_node.is_source
 
     def resolve_isPartitioned(self, _graphene_info: ResolveInfo) -> bool:
         return self._external_asset_node.partitions_def_data is not None
@@ -978,7 +978,7 @@ def resolve_metadata_entries(
     def resolve_op(
         self, _graphene_info: ResolveInfo
     ) -> Optional[Union[GrapheneSolidDefinition, GrapheneCompositeSolidDefinition]]:
-        if self.is_source_asset():
+        if self.is_source_or_defined_in_unexecutable_assets_def():
             return None
         external_pipeline = self.get_external_job()
         node_def_snap = self.get_node_definition_snap()
@@ -1057,7 +1057,7 @@ def resolve_repository(self, graphene_info: ResolveInfo) -> "GrapheneRepository"
     def resolve_required_resources(
         self, _graphene_info: ResolveInfo
     ) -> Sequence[GrapheneResourceRequirement]:
-        if self.is_source_asset():
+        if self.is_source_or_defined_in_unexecutable_assets_def():
             return []
         node_def_snap = self.get_node_definition_snap()
         all_unique_keys = self.get_required_resource_keys(node_def_snap)
@@ -1070,7 +1070,7 @@ def resolve_type(
             "GrapheneListDagsterType", "GrapheneNullableDagsterType", "GrapheneRegularDagsterType"
         ]
     ]:
-        if self.is_source_asset():
+        if self.is_source_or_defined_in_unexecutable_assets_def():
             return None
         external_pipeline = self.get_external_job()
         output_name = self.external_asset_node.output_name

python_modules/dagster/dagster/_core/definitions/assets.py

@@ -876,6 +876,28 @@ def is_asset_executable(self, asset_key: AssetKey) -> bool:
             self._metadata_by_key.get(asset_key, {}).get(SYSTEM_METADATA_KEY_ASSET_EXECUTION_TYPE)
         )
 
+    def is_executable(self):
+        """Returns True if this definition represents unexecutable assets.
+        Assumption: either all or none contained assets are unexecutable.
+        """
+        for key in self.keys:
+            if not self.is_asset_executable(key):
+                return False
+        return True
+
+    @property
+    def execution_type(self):
+        from dagster._core.definitions.asset_spec import (
+            SYSTEM_METADATA_KEY_ASSET_EXECUTION_TYPE,
+            AssetExecutionType,
+        )
+
+        # assumes execution type stored as metadata is same across all assets
+        for key in self.keys:
+            return AssetExecutionType.str_to_enum(
+                self._metadata_by_key.get(key, {}).get(SYSTEM_METADATA_KEY_ASSET_EXECUTION_TYPE)
+            )
+
     def get_partition_mapping_for_input(self, input_name: str) -> Optional[PartitionMapping]:
         return self._partition_mappings.get(self._keys_by_input_name[input_name])
 

python_modules/dagster/dagster/_core/definitions/assets_job.py

@@ -58,39 +58,51 @@ def is_base_asset_job_name(name: str) -> bool:
 
 
 def get_base_asset_jobs(
-    assets: Sequence[AssetsDefinition],
+    assets_defs: Sequence[AssetsDefinition],
     source_assets: Sequence[SourceAsset],
     asset_checks: Sequence[AssetChecksDefinition],
     resource_defs: Optional[Mapping[str, ResourceDefinition]],
     executor_def: Optional[ExecutorDefinition],
 ) -> Sequence[JobDefinition]:
-    assets_by_partitions_def: Dict[Optional[PartitionsDefinition], List[AssetsDefinition]] = (
+    # bucket the passed in AssetsDefinitions that are executable by partition.
+    # un-executable assets are intentionally omitted.
+    exe_assets_by_partitions_def: Dict[Optional[PartitionsDefinition], List[AssetsDefinition]] = (
         defaultdict(list)
     )
-    for assets_def in assets:
-        assets_by_partitions_def[assets_def.partitions_def].append(assets_def)
+    all_exe_assets = []
+    all_source_assets = [*source_assets]
+    for assets_def in assets_defs:
+        if assets_def.is_executable():
+            exe_assets_by_partitions_def[assets_def.partitions_def].append(assets_def)
+            all_exe_assets.append(assets_def)
+        else:
+            # treat all unexecutable assets as potential source assets
+            all_source_assets.extend(assets_def.to_source_assets())
 
     # We need to create "empty" jobs for each partitions def that is used by an observable but no
     # materializable asset. They are empty because we don't assign the source asset to the `assets`,
     # but rather the `source_assets` argument of `build_assets_job`.
     for observable in [sa for sa in source_assets if sa.is_observable]:
-        if observable.partitions_def not in assets_by_partitions_def:
-            assets_by_partitions_def[observable.partitions_def] = []
-    if len(assets_by_partitions_def.keys()) == 0 or assets_by_partitions_def.keys() == {None}:
+        if observable.partitions_def not in exe_assets_by_partitions_def:
+            exe_assets_by_partitions_def[observable.partitions_def] = []
+
+    if len(exe_assets_by_partitions_def.keys()) == 0 or exe_assets_by_partitions_def.keys() == {
+        None
+    }:
         return [
             build_assets_job(
                 name=ASSET_BASE_JOB_PREFIX,
-                assets=assets,
+                assets=all_exe_assets,
                 asset_checks=asset_checks,
-                source_assets=source_assets,
+                source_assets=all_source_assets,
                 executor_def=executor_def,
                 resource_defs=resource_defs,
             )
         ]
     else:
-        unpartitioned_assets = assets_by_partitions_def.get(None, [])
+        unpartitioned_assets_defs = exe_assets_by_partitions_def.get(None, [])
         partitioned_assets_by_partitions_def = {
-            k: v for k, v in assets_by_partitions_def.items() if k is not None
+            k: v for k, v in exe_assets_by_partitions_def.items() if k is not None
         }
         jobs = []
 
@@ -101,8 +113,11 @@ def get_base_asset_jobs(
             jobs.append(
                 build_assets_job(
                     f"{ASSET_BASE_JOB_PREFIX}_{i}",
-                    assets=[*assets_with_partitions, *unpartitioned_assets],
-                    source_assets=[*source_assets, *assets],
+                    assets=[*assets_with_partitions, *unpartitioned_assets_defs],
+                    source_assets=[
+                        *all_source_assets,
+                        *all_exe_assets,
+                    ],
                     asset_checks=asset_checks,
                     resource_defs=resource_defs,
                     executor_def=executor_def,

python_modules/dagster/dagster/_core/definitions/observable_asset.py

@@ -45,7 +45,7 @@ def create_unexecutable_observable_assets_def(specs: Sequence[AssetSpec]):
         )
 
     @multi_asset(specs=new_specs)
-    def an_asset() -> None:
+    def an_asset():
         raise DagsterInvariantViolationError(
             f"You have attempted to execute an unexecutable asset {[spec.key for spec in specs]}"
         )

python_modules/dagster/dagster/_core/definitions/repository_definition/repository_data_builder.py

@@ -193,7 +193,7 @@ def build_caching_repository_data_from_list(
 
     if assets_defs or source_assets or asset_checks_defs:
         for job_def in get_base_asset_jobs(
-            assets=assets_defs,
+            assets_defs=assets_defs,
             source_assets=source_assets,
             executor_def=default_executor_def,
             resource_defs=top_level_resources,

python_modules/dagster/dagster/_core/host_representation/external_data.py

@@ -10,6 +10,7 @@
 from enum import Enum
 from typing import (
     TYPE_CHECKING,
+    AbstractSet,
     Any,
     Dict,
     Iterable,
@@ -51,6 +52,7 @@
     SYSTEM_METADATA_KEY_ASSET_EXECUTION_TYPE,
     AssetExecutionType,
 )
+from dagster._core.definitions.assets import AssetsDefinition
 from dagster._core.definitions.assets_job import is_base_asset_job_name
 from dagster._core.definitions.auto_materialize_policy import AutoMaterializePolicy
 from dagster._core.definitions.backfill_policy import BackfillPolicy
@@ -1260,17 +1262,24 @@ def __new__(
             ),
         )
 
-    @property
-    def is_executable(self) -> bool:
+    def _get_exe_type_metadata(self) -> Optional[str]:
         metadata_value = self.metadata.get(SYSTEM_METADATA_KEY_ASSET_EXECUTION_TYPE)
         if not metadata_value:
-            varietal_text = None
+            cap_text = None
         else:
             check.inst(metadata_value, TextMetadataValue)  # for guaranteed runtime error
             assert isinstance(metadata_value, TextMetadataValue)  # for type checker
-            varietal_text = metadata_value.value
+            cap_text = metadata_value.value
+
+        return cap_text
+
+    @property
+    def is_executable(self) -> bool:
+        return AssetExecutionType.is_executable(self._get_exe_type_metadata())
 
-        return AssetExecutionType.is_executable(varietal_text)
+    @property
+    def execution_type(self) -> AssetExecutionType:
+        return AssetExecutionType.str_to_enum(self._get_exe_type_metadata())
 
 
 ResourceJobUsageMap = Dict[str, List[ResourceJobUsageEntry]]
@@ -1341,6 +1350,11 @@ def external_repository_data_from_def(
     asset_graph = external_asset_graph_from_defs(
         jobs,
         source_assets_by_key=repository_def.source_assets_by_key,
+        unexecutable_assets_defs={
+            assets_def
+            for assets_def in repository_def.assets_defs_by_key.values()
+            if not assets_def.is_executable()
+        },
     )
 
     nested_resource_map = _get_nested_resources_map(
@@ -1462,6 +1476,7 @@ def external_asset_checks_from_defs(
 def external_asset_graph_from_defs(
     job_defs: Sequence[JobDefinition],
     source_assets_by_key: Mapping[AssetKey, SourceAsset],
+    unexecutable_assets_defs: Optional[AbstractSet[AssetsDefinition]],
 ) -> Sequence[ExternalAssetNode]:
     node_defs_by_asset_key: Dict[AssetKey, List[Tuple[NodeOutputHandle, JobDefinition]]] = (
         defaultdict(list)
@@ -1481,6 +1496,7 @@ def external_asset_graph_from_defs(
     descriptions_by_asset_key: Dict[AssetKey, str] = {}
     atomic_execution_unit_ids_by_asset_key: Dict[AssetKey, str] = {}
 
+    # resolve details for assets in jobs
     for job_def in job_defs:
         asset_layer = job_def.asset_layer
         asset_info_by_node_output = asset_layer.asset_info_by_node_output_handle
@@ -1535,10 +1551,22 @@ def external_asset_graph_from_defs(
 
         group_name_by_asset_key.update(asset_layer.group_names_by_assets())
 
-    asset_keys_without_definitions = all_upstream_asset_keys.difference(
-        node_defs_by_asset_key.keys()
-    ).difference(source_assets_by_key.keys())
-
+    # resolve details for unexecutable assets & their dependencies
+    unexecutable_keys = set()
+    for unexec_def in unexecutable_assets_defs or []:
+        for key in unexec_def.keys:
+            unexecutable_keys.add(key)
+            for depends_on in unexec_def.asset_deps[key]:
+                deps[key][depends_on] = ExternalAssetDependency(depends_on)
+                dep_by[depends_on][key] = ExternalAssetDependedBy(key)
+
+    # build nodes for asset keys that were referred to in jobs but not defined elsewhere
+    # (handles SourceAsset usage by @ops)
+    asset_keys_without_definitions = (
+        all_upstream_asset_keys.difference(node_defs_by_asset_key.keys())
+        .difference(source_assets_by_key.keys())
+        .difference(unexecutable_keys)
+    )
     asset_nodes = [
         ExternalAssetNode(
             asset_key=asset_key,
@@ -1551,6 +1579,7 @@ def external_asset_graph_from_defs(
         for asset_key in asset_keys_without_definitions
     ]
 
+    # build nodes for source assets
     for source_asset in source_assets_by_key.values():
         if source_asset.key not in node_defs_by_asset_key:
             job_names = (
@@ -1592,6 +1621,7 @@ def external_asset_graph_from_defs(
                 )
             )
 
+    # build nodes for assets backed by ops/jobs
     for asset_key, node_tuple_list in node_defs_by_asset_key.items():
         node_output_handle, job_def = node_tuple_list[0]
 
@@ -1659,6 +1689,23 @@ def external_asset_graph_from_defs(
             )
         )
 
+    # build nodes for unexecutable assets defs
+    for unexec_def in unexecutable_assets_defs or []:
+        for key in unexec_def.keys:
+            asset_nodes.append(
+                ExternalAssetNode(
+                    asset_key=key,
+                    dependencies=list(deps[key].values()),
+                    depended_by=list(dep_by[key].values()),
+                    metadata=unexec_def.metadata_by_key[key],
+                    group_name=unexec_def.group_names_by_key[key],
+                    is_source=False,
+                    is_observable=False,
+                    # could use a special kind tag for more UI punch
+                    # compute_kind=...
+                )
+            )
+
     defined = set()
     for node in asset_nodes:
         if node.asset_key in defined:

python_modules/dagster/dagster_tests/asset_defs_tests/test_asset_graph.py

@@ -43,7 +43,9 @@ def repo():
         return assets
 
     external_asset_nodes = external_asset_graph_from_defs(
-        repo.get_all_jobs(), source_assets_by_key={}
+        repo.get_all_jobs(),
+        source_assets_by_key={},
+        unexecutable_assets_defs=set(),
     )
     return ExternalAssetGraph.from_repository_handles_and_external_asset_nodes(
         [(MagicMock(), asset_node) for asset_node in external_asset_nodes]

python_modules/dagster/dagster_tests/asset_defs_tests/test_assets_job.py

@@ -1959,7 +1959,7 @@ def hourly_asset(): ...
     def unpartitioned_asset(): ...
 
     jobs = get_base_asset_jobs(
-        assets=[
+        assets_defs=[
             daily_asset,
             daily_asset2,
             daily_asset_different_start_date,
@@ -2004,7 +2004,7 @@ def asset_b(): ...
     def asset_x(asset_b: B): ...
 
     jobs = get_base_asset_jobs(
-        assets=[
+        assets_defs=[
             asset_x,
         ],
         source_assets=[

python_modules/dagster/dagster_tests/core_tests/execution_tests/test_asset_backfill.py

@@ -658,7 +658,9 @@ def external_asset_graph_from_assets_by_repo_name(
         repo = Definitions(assets=assets).get_repository_def()
 
         external_asset_nodes = external_asset_graph_from_defs(
-            repo.get_all_jobs(), source_assets_by_key=repo.source_assets_by_key
+            repo.get_all_jobs(),
+            source_assets_by_key=repo.source_assets_by_key,
+            unexecutable_assets_defs=set(),
         )
         repo_handle = MagicMock(repository_name=repo_name)
         from_repository_handles_and_external_asset_nodes.extend(