search

mapbox / cardboard

tile indexed geo database interface.
ISC License
52 stars 10 forks source link

Store number of edits in the metadata #160

Closed mcwhittemore closed 8 years ago

mcwhittemore commented 8 years ago

A count of the number of edits would be helpful when trying to decide if you need to do a large recalculation of something derived from datasets stored in cardboard. While this won't keep copies of different versions of the dataset it will let users know if their derivative of the data is behind the data itself and will also let developers know if one derivative is from newer data than another one.

To do this I think we'd just want to update metadata.adjustProperties and metadata.defaultInfo

I'm not 100% sure how dynamo works with add on properties that haven't been created yet, so this might require a migration for existing datasets.

rclark commented 8 years ago

This would just be a continuously incrementing counter then? And then derived products would keep track of the edit count at which they were spawned from the dataset?

This would be possible to begin implementing in an existing table without any data migration.

mcwhittemore commented 8 years ago

And then derived products would keep track of the edit count at which they were spawned from the dataset?

Yep.