Jason Gofford
03/08/2024, 2:08 PMScout
03/08/2024, 2:08 PMDagsterRun
object that you've fetched from the instance, you can inspect its tags
attribute to find this information. Additionally, you can inspect run tags using the DagsterInstance.get_run_tags
method to determine if a run was part of a backfill. This information is available in the context of the run, which can be used to identify whether it was triggered by a backfill operation.Jason Gofford
03/08/2024, 2:09 PMScout
03/08/2024, 2:09 PMtags
field of the DagsterRun
object(s) to look for a tag that indicates a backfill. 3. The presence of a backfill tag would tell you that the run is part of a backfill operation. If you are using the Dagster GraphQL API, you might query for runs and include the tags in your query, then filter the results based on the presence of a backfill tag. Please refer to the official Dagster documentation or the Dagster instance API for the exact methods and attributes you would use to perform these steps, as the specifics may vary depending on the version of Dagster you are using and the context in which you are operating.Jason Gofford
03/13/2024, 1:21 PMScout
03/13/2024, 1:21 PMDagsterRun
object, which contains a tags
attribute. The tags
attribute is a dictionary where each key-value pair represents a tag applied to the run. Here's a conceptual example of how you might inspect the tags of a run: python from dagster import DagsterInstance # Assuming you have the run_id of the run you want to inspect run_id = "example_run_id" # Get the default Dagster instance instance = DagsterInstance.get() # Fetch the run from the instance dagster_run = instance.get_run_by_id(run_id) # Check if the run has tags if dagster_run.tags: # Print all tags for tag_key, tag_value in dagster_run.tags.items(): print(f"Tag: {tag_key}, Value: {tag_value}") # Specifically check for a backfill tag backfill_tag = dagster_run.tags.get('dagster/backfill') if backfill_tag: print(f"This run is part of a backfill with ID: {backfill_tag}") else: print("This run is not part of a backfill.") else: print("This run has no tags.")
In this example, DagsterInstance.get()
is used to retrieve the default Dagster instance. The get_run_by_id
method is then used to fetch the DagsterRun
object for a given run_id
. The tags
attribute of the DagsterRun
object is a dictionary that contains all the tags applied to the run. You can iterate over this dictionary to inspect all tags or access a specific tag directly by its key, such as 'dagster/backfill'
for backfill-related tags. Please note that the actual implementation may vary, and you should consult the latest Dagster documentation for the most accurate and up-to-date code examples and API usage.Jason Gofford
03/13/2024, 1:39 PMScout
03/13/2024, 1:39 PMAssetExecutionContext
which contains information about the current run, including its tags. Here's an example of how you might check for a backfill tag within an asset: python from dagster import asset, AssetExecutionContext @asset def my_asset(context: AssetExecutionContext): # Check for a backfill tag in the current run's tags backfill_tag = context.run_config.get("tags", {}).get("dagster/backfill") if backfill_tag: <http://context.log.info|context.log.info>(f"This asset is part of a backfill with ID: {backfill_tag}") # Perform logic specific to backfill runs else: <http://context.log.info|context.log.info>("This asset is not part of a backfill.") # Perform regular logic
In this example, context.run_config["tags"]
is used to access the tags of the current run. The dagster/backfill
tag is specifically checked to determine if the asset is part of a backfill job. If the tag exists, you can perform any special logic required for backfill runs; otherwise, you can proceed with the regular computation for the asset. Remember to consult the latest Dagster documentation for the most accurate and up-to-date code examples and API usage, as APIs can evolve over time.Jason Gofford
03/13/2024, 1:47 PMScout
03/13/2024, 1:47 PMDagsterInstance
methods such as get_runs
with appropriate filters. Here's a conceptual example of how you might approach this: python from dagster import asset, AssetExecutionContext, DagsterInstance, RunsFilter, DagsterRunStatus @asset def my_asset(context: AssetExecutionContext): instance = DagsterInstance.get() partition_key = context.run_config.get("tags", {}).get("dagster/partition") if partition_key: # Fetch runs for the current job and partition runs = instance.get_runs( filters=RunsFilter( tags={"dagster/partition": partition_key}, statuses=[DagsterRunStatus.SUCCESS] # You might want to filter only successful runs ) ) # Sort runs by timestamp (newest first) sorted_runs = sorted(runs, key=lambda r: r.timestamp, reverse=True) # Check if the current run is the latest run if sorted_runs and context.run_id == sorted_runs[0].run_id: <http://context.log.info|context.log.info>(f"This run is the latest run for partition {partition_key}.") # Perform logic specific to the latest run else: <http://context.log.info|context.log.info>(f"This run is not the latest run for partition {partition_key}.") # Perform regular logic else: <http://context.log.info|context.log.info>("This asset is not part of a partitioned run.")
In this example, we use the DagsterInstance.get_runs
method to fetch all runs associated with the current partition key and filter them by status if needed. We then sort these runs by their timestamp to find the most recent one. By comparing the current run's ID with the ID of the most recent run, we can determine if the current run is the latest. Please note that this is a conceptual example and may require adjustments based on your specific use case and the version of Dagster you are using. Always refer to the latest Dagster documentation for the most accurate and up-to-date code examples and API usage.