Update materialization logic; add tests

dagster-io · Nov 27, 2024 · 22d80d7 · 22d80d7
1 parent ee8210a
commit 22d80d7
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Showing 4 changed files with 273 additions and 159 deletions.
diff --git a/python_modules/libraries/dagster-fivetran/dagster_fivetran/asset_decorator.py b/python_modules/libraries/dagster-fivetran/dagster_fivetran/asset_decorator.py
@@ -101,6 +101,8 @@ def fivetran_connector_assets(context: dg.AssetExecutionContext, fivetran: Fivet
             )
 
     """
+    dagster_fivetran_translator = dagster_fivetran_translator or DagsterFivetranTranslator()
+
     return multi_asset(
         name=name,
         group_name=group_name,
@@ -111,7 +113,6 @@ def fivetran_connector_assets(context: dg.AssetExecutionContext, fivetran: Fivet
             )
             for spec in workspace.load_asset_specs(
                 dagster_fivetran_translator=dagster_fivetran_translator
-                or DagsterFivetranTranslator()
             )
             if FivetranMetadataSet.extract(spec.metadata).connector_id == connector_id
         ],

diff --git a/python_modules/libraries/dagster-fivetran/dagster_fivetran/resources.py b/python_modules/libraries/dagster-fivetran/dagster_fivetran/resources.py
@@ -4,7 +4,7 @@
 import time
 from datetime import datetime, timedelta
 from functools import partial
-from typing import Any, Callable, Mapping, Optional, Sequence, Tuple, Type, Union
+from typing import Any, Callable, Iterator, Mapping, Optional, Sequence, Tuple, Type, Union
 from urllib.parse import urljoin
 
 import requests
@@ -14,9 +14,9 @@
     Definitions,
     Failure,
     InitResourceContext,
+    MaterializeResult,
     MetadataValue,
     OpExecutionContext,
-    Output,
     __version__,
     _check as check,
     get_dagster_logger,
@@ -27,7 +27,7 @@
 from dagster._core.definitions.asset_spec import AssetSpec
 from dagster._core.definitions.definitions_load_context import StateBackedDefinitionsLoader
 from dagster._core.definitions.resource_definition import dagster_maintained_resource
-from dagster._record import record
+from dagster._record import as_dict, record
 from dagster._utils.cached_method import cached_method
 from dagster._vendored.dateutil import parser
 from pydantic import Field, PrivateAttr
@@ -978,25 +978,37 @@ def _generate_materialization(
 
                 yield AssetMaterialization(
                     asset_key=asset_key,
-                    description=f"Table generated via Fivetran sync: {schema.name}.{table.name}",
+                    description=(
+                        f"Table generated via Fivetran sync: {schema.name_in_destination}.{table.name_in_destination}"
+                    ),
                     metadata={
                         **metadata_for_table(
-                            table,
+                            as_dict(table),
                             get_fivetran_connector_url(fivetran_output.connector_details),
                             include_column_info=True,
                             database=None,
-                            schema=schema.name,
-                            table=table.name,
+                            schema=schema.name_in_destination,
+                            table=table.name_in_destination,
                         ),
                         "schema_source_name": schema_source_name,
                         "table_source_name": table_source_name,
                     },
                 )
 
     def sync_and_poll(
-        self, context: Optional[Union[OpExecutionContext, AssetExecutionContext]] = None
-    ):
-        # TODO: Add docstrings
+        self, context: Union[OpExecutionContext, AssetExecutionContext]
+    ) -> Iterator[Union[AssetMaterialization, MaterializeResult]]:
+        """Executes a sync and poll process to materialize Fivetran assets.
+
+        Args:
+            context (Union[OpExecutionContext, AssetExecutionContext]): The execution context
+                from within `@fivetran_assets`. If an AssetExecutionContext is passed,
+                its underlying OpExecutionContext will be used.
+
+        Returns:
+            Iterator[Union[AssetMaterialization, MaterializeResult]]: An iterator of MaterializeResult
+                or AssetMaterialization.
+        """
         assets_def = context.assets_def
         dagster_fivetran_translator = get_translator_from_fivetran_assets(assets_def)
 
@@ -1014,13 +1026,11 @@ def sync_and_poll(
         for materialization in self._generate_materialization(
             fivetran_output=fivetran_output, dagster_fivetran_translator=dagster_fivetran_translator
         ):
-            # scan through all tables actually created, if it was expected then emit an Output.
-            # otherwise, emit a runtime AssetMaterialization
+            # Scan through all tables actually created, if it was expected then emit a MaterializeResult.
+            # Otherwise, emit a runtime AssetMaterialization.
             if materialization.asset_key in context.selected_asset_keys:
-                yield Output(
-                    value=None,
-                    output_name=materialization.asset_key.to_python_identifier(),
-                    metadata=materialization.metadata,
+                yield MaterializeResult(
+                    asset_key=materialization.asset_key, metadata=materialization.metadata
                 )
                 materialized_asset_keys.add(materialization.asset_key)
             else: