[external-assets] Add AssetGraph subsetting, make build_asset_job use…

… AssetGraph

examples/docs_snippets/docs_snippets_tests/concepts_tests/assets_tests/test_observable_source_asset.py

@@ -5,6 +5,7 @@
 )
 from dagster._core.definitions.definitions_class import Definitions
 from dagster._core.instance_for_test import instance_for_test
+from dagster._core.test_utils import create_test_asset_job
 from docs_snippets.concepts.assets.observable_source_assets import (
     foo_source_asset,
     observation_job,
@@ -13,11 +14,7 @@
 
 
 def test_observable_source_asset():
-    @repository
-    def repo():
-        return [foo_source_asset]
-
-    job_def = build_assets_job("test_job", [], [foo_source_asset])
+    job_def = create_test_asset_job([foo_source_asset])
     result = job_def.execute_in_process()
     assert result.success
 

python_modules/dagster/dagster/_core/definitions/asset_graph.py

@@ -1,8 +1,10 @@
 from functools import cached_property
 from typing import AbstractSet, Iterable, Mapping, Optional, Sequence, Union
 
+import dagster._check as check
 from dagster._core.definitions.asset_check_spec import AssetCheckKey
 from dagster._core.definitions.asset_checks import AssetChecksDefinition
+from dagster._core.definitions.asset_layer import subset_assets_defs
 from dagster._core.definitions.asset_spec import (
     SYSTEM_METADATA_KEY_AUTO_CREATED_STUB_ASSET,
     AssetSpec,
@@ -215,7 +217,7 @@ def from_assets(
 
         # Build the set of AssetNodes. Each node holds key rather than object references to parent
         # and child nodes.
-        dep_graph = generate_asset_dep_graph(assets_defs, [])
+        dep_graph = generate_asset_dep_graph(assets_defs)
         asset_nodes_by_key = {
             key: AssetNode(
                 key=key,
@@ -301,3 +303,43 @@ def asset_check_keys(self) -> AbstractSet[AssetCheckKey]:
             *(key for ad in self.assets_defs for key in ad.check_keys),
             *(key for acd in self.asset_checks_defs for key in acd.keys),
         }
+
+    def get_subset(
+        self,
+        executable_asset_keys: AbstractSet[AssetKey],
+        asset_check_keys: Optional[AbstractSet[AssetCheckKey]] = None,
+    ) -> "AssetGraph":
+        """Returns a new asset graph where only the provided asset keys are executable. All parent
+        keys of a selected executabel asset will be included as unexecutable external assets (unless
+        they are themselves present in the executable selection).
+        """
+        from dagster._core.definitions.external_asset import (
+            create_unexecutable_external_assets_from_assets_def,
+        )
+
+        invalid_executable_keys = executable_asset_keys - self.executable_asset_keys
+        check.invariant(
+            not invalid_executable_keys,
+            "Provided executable asset keys must be a subset of existing executable asset keys."
+            f" Invalid provided keys: {invalid_executable_keys}",
+        )
+
+        executable_assets_defs, raw_loadable_assets_defs = subset_assets_defs(
+            self.assets_defs, executable_asset_keys, asset_check_keys
+        )
+        loadable_assets_defs = [
+            unexecutable_ad
+            for ad in raw_loadable_assets_defs
+            for unexecutable_ad in create_unexecutable_external_assets_from_assets_def(ad)
+        ]
+
+        # ignore check keys that don't correspond to an AssetChecksDefinition
+        asset_checks_defs = list(
+            {
+                acd
+                for key, acd in self._asset_check_compute_defs_by_key.items()
+                if key in (asset_check_keys or []) and isinstance(acd, AssetChecksDefinition)
+            }
+        )
+
+        return self.from_assets([*executable_assets_defs, *loadable_assets_defs], asset_checks_defs)

python_modules/dagster/dagster/_core/definitions/asset_layer.py

@@ -44,6 +44,7 @@
 from .resource_definition import ResourceDefinition
 
 if TYPE_CHECKING:
+    from dagster._core.definitions.asset_graph import AssetGraph
     from dagster._core.definitions.assets import AssetsDefinition, SourceAsset
     from dagster._core.definitions.base_asset_graph import AssetKeyOrCheckKey
     from dagster._core.definitions.job_definition import JobDefinition
@@ -407,8 +408,7 @@ def from_graph_and_assets_node_mapping(
         graph_def: GraphDefinition,
         assets_defs_by_outer_node_handle: Mapping[NodeHandle, "AssetsDefinition"],
         asset_checks_defs_by_node_handle: Mapping[NodeHandle, "AssetChecksDefinition"],
-        observable_source_assets_by_node_handle: Mapping[NodeHandle, "SourceAsset"],
-        source_assets: Sequence["SourceAsset"],
+        asset_graph: "AssetGraph",
     ) -> "AssetLayer":
         """Generate asset info from a GraphDefinition and a mapping from nodes in that graph to the
         corresponding AssetsDefinition objects.
@@ -419,19 +419,10 @@ def from_graph_and_assets_node_mapping(
             assets_defs_by_outer_node_handle (Mapping[NodeHandle, AssetsDefinition]): A mapping from
                 a NodeHandle pointing to the node in the graph where the AssetsDefinition ended up.
         """
-        from dagster._core.definitions.external_asset import (
-            create_external_asset_from_source_asset,
+        unexecutable_assets_defs = asset_graph.assets_defs_for_keys(
+            asset_graph.unexecutable_asset_keys
         )
 
-        # Eliminate source assets here
-        observable_assets_defs_by_node_handle = {
-            k: create_external_asset_from_source_asset(sa)
-            for k, sa in observable_source_assets_by_node_handle.items()
-        }
-        unexecutable_assets_defs = [
-            create_external_asset_from_source_asset(sa) for sa in source_assets
-        ]
-
         asset_key_by_input: Dict[NodeInputHandle, AssetKey] = {}
         asset_info_by_output: Dict[NodeOutputHandle, AssetOutputInfo] = {}
         check_key_by_output: Dict[NodeOutputHandle, AssetCheckKey] = {}
@@ -571,32 +562,11 @@ def partitions_fn(context: "OutputContext") -> AbstractSet[str]:
             key: assets_def
             for assets_def in (
                 *assets_defs_by_outer_node_handle.values(),
-                *observable_assets_defs_by_node_handle.values(),
                 *unexecutable_assets_defs,
             )
             for key in assets_def.keys
         }
 
-        for node_handle, assets_def in observable_assets_defs_by_node_handle.items():
-            node_def = assets_def.node_def
-            check.invariant(len(node_def.output_defs) == 1)
-            output_name = node_def.output_defs[0].name
-            # resolve graph output to the op output it comes from
-            inner_output_def, inner_node_handle = node_def.resolve_output_to_origin(
-                output_name, handle=node_handle
-            )
-            node_output_handle = NodeOutputHandle(
-                check.not_none(inner_node_handle), inner_output_def.name
-            )
-
-            asset_info_by_output[node_output_handle] = AssetOutputInfo(
-                assets_def.key,
-                partitions_fn=None,
-                partitions_def=assets_def.partitions_def,
-                is_required=True,
-                code_version=inner_output_def.code_version,
-            )
-
         assets_defs_by_node_handle: Dict[NodeHandle, "AssetsDefinition"] = {
             # nodes for assets
             **{
@@ -848,7 +818,6 @@ def my_graph():
 def build_asset_selection_job(
     name: str,
     assets: Iterable["AssetsDefinition"],
-    source_assets: Iterable["SourceAsset"],
     asset_checks: Iterable["AssetChecksDefinition"],
     executor_def: Optional[ExecutorDefinition] = None,
     config: Optional[Union[ConfigMapping, Mapping[str, Any], "PartitionedConfig"]] = None,
@@ -863,22 +832,24 @@ def build_asset_selection_job(
     hooks: Optional[AbstractSet[HookDefinition]] = None,
     op_retry_policy: Optional[RetryPolicy] = None,
 ) -> "JobDefinition":
+    from dagster._core.definitions.asset_graph import AssetGraph
     from dagster._core.definitions.assets_job import build_assets_job
+    from dagster._core.definitions.external_asset import (
+        create_unexecutable_external_assets_from_assets_def,
+    )
 
     if asset_selection is None and asset_check_selection is None:
         # no selections, include everything
         included_assets = list(assets)
         excluded_assets = []
-        included_source_assets = list(source_assets)
         included_checks_defs = list(asset_checks)
     else:
         # Filter to assets that match either selected assets or include a selected check.
         # E.g. a multi asset can be included even if it's not in asset_selection, if it has a selected check
         # defined with check_specs
-        (included_assets, excluded_assets) = _subset_assets_defs(
+        (included_assets, excluded_assets) = subset_assets_defs(
             assets, asset_selection or set(), asset_check_selection
         )
-        included_source_assets = _subset_source_assets(source_assets, asset_selection or set())
 
         if asset_check_selection is None:
             # If assets were selected and checks are None, then include all checks on the selected assets.
@@ -906,21 +877,23 @@ def build_asset_selection_job(
                 f"{partitions_def}.",
             )
 
-    all_included_assets = [*included_assets, *included_source_assets]
-    executable_assets = [asset for asset in all_included_assets if asset.is_executable]
-    loadable_assets = [
-        *(asset for asset in all_included_assets if not asset.is_executable),
-        *(asset for asset in source_assets if asset not in included_source_assets),
-        *excluded_assets,
+    executable_assets_defs = [asset for asset in included_assets if asset.is_executable]
+    unexecutable_assets_defs = [
+        unexecutable_ad
+        for ad in (
+            *(asset for asset in included_assets if not asset.is_executable),
+            *excluded_assets,
+        )
+        for unexecutable_ad in create_unexecutable_external_assets_from_assets_def(ad)
     ]
-    final_asset_checks = included_checks_defs
+    asset_graph = AssetGraph.from_assets(
+        [*executable_assets_defs, *unexecutable_assets_defs], included_checks_defs
+    )
 
     return build_assets_job(
         name=name,
-        executable_assets=executable_assets,
-        asset_checks=final_asset_checks,
+        asset_graph=asset_graph,
         config=config,
-        loadable_assets=loadable_assets,
         resource_defs=resource_defs,
         executor_def=executor_def,
         partitions_def=partitions_def,
@@ -933,7 +906,7 @@ def build_asset_selection_job(
     )
 
 
-def _subset_assets_defs(
+def subset_assets_defs(
     assets: Iterable["AssetsDefinition"],
     selected_asset_keys: AbstractSet[AssetKey],
     selected_asset_check_keys: Optional[AbstractSet[AssetCheckKey]],
@@ -958,7 +931,7 @@ def _subset_assets_defs(
         # if no checks were selected, filter to checks that target selected assets
         else:
             selected_check_subset = {
-                handle for handle in asset.check_keys if handle.asset_key in selected_subset
+                key for key in asset.check_keys if key.asset_key in selected_subset
             }
 
         # all assets in this def are selected

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

@@ -1112,7 +1112,6 @@ def with_attributes(
             Union[AutoMaterializePolicy, Mapping[AssetKey, AutoMaterializePolicy]]
         ] = None,
         backfill_policy: Optional[BackfillPolicy] = None,
-        is_subset: bool = False,
         check_specs_by_output_name: Optional[Mapping[str, AssetCheckSpec]] = None,
         selected_asset_check_keys: Optional[AbstractSet[AssetCheckKey]] = None,
     ) -> "AssetsDefinition":
@@ -1277,7 +1276,7 @@ def with_attributes(
                 **self._descriptions_by_key,
                 **replaced_descriptions_by_key,
             },
-            is_subset=is_subset,
+            is_subset=self.is_subset,
             check_specs_by_output_name=check_specs_by_output_name
             if check_specs_by_output_name
             else self.check_specs_by_output_name,