#13139·dagster

Custom mapping between dynamic partitions

Author: bennyweiseCreated Mar 24, 2023Updated Sep 15, 2026
Labelstype: feature-requestarea: partitions

What's the use case?

I have a case where I have a dynamically partitioned asset, where each partition is a piece of equipment at a particular location, and a second dynamically partitioned asset where each partition corresponds to the weather forecast for a given location. I would like to map the postcode-based forecasts to each piece of equipment, however the mapping won't be known until the equipment assets are loaded. I would like to be able to use this information to create a mapping that can be used in the downstream assets.

This was also discussed in slack

Ideas of implementation

A custom mapping could be created in an op / asset, that is then used in the partition mapping.

Additional information

No response

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