@Scout how to set automaterialization on an asset with using

eager

or

lazy

but by using explicit rules

To set auto-materialization on an asset using explicit rules rather than the predefined

eager

or

lazy

policies, you can construct an

AutoMaterializePolicy

and then add or remove rules using the

with_rules

and

without_rules

methods. Here's how you can do it according to the documentation: 1. Adding Rules: To add rules to an auto-materialization policy, you can use the

with_rules

method. This constructs a copy of the policy with the specified rules added. If an instance of a provided rule with the same type exists on this policy, it will be replaced.

python from dagster import AutoMaterializePolicy, AutoMaterializeRule, asset  # Construct an AutoMaterializePolicy and add custom rules custom_policy = AutoMaterializePolicy.eager().with_rules(     AutoMaterializeRule.your_custom_rule() )  @asset(auto_materialize_policy=custom_policy) def your_asset():     ...

2. Removing Rules: To remove rules from an auto-materialization policy, you can use the

without_rules

method. This constructs a copy of the policy with the specified rules removed. An error is raised if any of the arguments are not rules in this policy.

python from dagster import AutoMaterializePolicy, AutoMaterializeRule, asset  # Construct an AutoMaterializePolicy and remove specific rules custom_policy = AutoMaterializePolicy.eager().without_rules(     AutoMaterializeRule.rule_to_remove() )  @asset(auto_materialize_policy=custom_policy) def your_asset():     ...

Remember that constructing an

AutoMaterializePolicy

directly is not recommended as the API is subject to change. It is better to use

AutoMaterializePolicy.eager()

or

AutoMaterializePolicy.lazy()

as a starting point and then modify them with

with_rules

or

without_rules

as needed. Please note that the actual rule names like

your_custom_rule

and

rule_to_remove

are placeholders. You should replace them with actual

AutoMaterializeRule

methods that correspond to the rules you want to add or remove. For example,

AutoMaterializeRule.skip_on_not_all_parents_updated()

is a real rule that you can use with

with_rules

to ensure that an asset is only materialized when all of its parents have been updated.