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# ask-ai
a

Andreas

03/12/2024, 1:30 PM
define_asset_job selection of asset groups
s

Scout

03/12/2024, 1:30 PM
To define an asset job that targets a selection of asset groups, you can use the
define_asset_job
function in combination with the
AssetSelection
API. The
AssetSelection.groups
method allows you to specify one or more asset groups to include in the job. Here's an example from the documentation on how to use
AssetSelection.groups
to target all assets in a specific group:
Copy code
python from dagster import define_asset_job, AssetSelection  # Define a job that targets all the assets in a group called "marketing": marketing_job = define_asset_job(     name="marketing_job",     selection=AssetSelection.groups("marketing") )
You can also combine multiple groups using the
|
operator, which represents the union of selections:
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python # Define a job that targets all assets in both "marketing" and "sales" groups: combined_job = define_asset_job(     name="combined_job",     selection=AssetSelection.groups("marketing") | AssetSelection.groups("sales") )
The
AssetSelection
API provides flexibility in how you select assets for a job, allowing for unions, intersections, and differences of selections using operators like
|
,
&
, and
-
, respectively. Remember that resources are supplied to the assets, not the job itself, so you would define resources at the asset level. For more complex selection logic, you can refer to the
AssetSelection
API in the documentation, which provides a variety of methods to create custom selections based on your needs.
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