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# ask-ai
p

Pierre Cadman

02/27/2024, 4:24 PM
Is there a way to have different partitions on an asset materialized in different asset functions?
s

Scout

02/27/2024, 4:24 PM
Based on the documentation, an asset can represent a collection of partitions that can be tracked and materialized independently. Each partition functions like its own mini-asset, sharing a common materialization function and dependencies. Typically, each partition corresponds to a separate file or a slice of a table in a database, and you can launch materializations of individual partitions. However, the documentation does not explicitly state that different partitions of the same asset can be materialized using different asset functions. The concept of partitions in Dagster is generally tied to the idea that all partitions of an asset share the same computation logic, as defined by the asset's materialization function. If you need to materialize different partitions using different logic, you might consider defining multiple assets, each with its own materialization function, and then partitioning each asset accordingly. Alternatively, you could have conditional logic within a single asset function that behaves differently based on the partition key, but this would still be considered a single asset function. For more complex scenarios involving multiple dimensions or dynamic partitioning, the documentation describes using
MultiPartitionsDefinition
and
DynamicPartitionsDefinition
to handle such cases. However, these still revolve around the concept of a single asset function that handles all partitions, potentially with logic that varies based on the partition key. If you have a specific use case that requires different functions for different partitions of the same asset, you might want to check if there have been updates to the documentation or new features added to Dagster that address this scenario, as the current documentation does not provide a direct method for doing so.
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