villebro opened a new pull request #16017:
URL: https://github.com/apache/superset/pull/16017


   ### SUMMARY
   This PR fixes native filter metadata in versioned import/export of 
dashboards by doing the following:
   - export all datasets referenced in native filters, even those not 
referenced by charts in dashboard.
   - replaces `datasetId` with `datasetUuid` in native filter targets to ensure 
that dataset reference is based on UUID, not numeric id.
   
   Other bycatch fixes that were found while testing:
   - Fix datatype of `query_context` in `ImportV1ChartSchema`, which should be 
`String`, not `Dict` (caused a marshmallow schema validation exception).
   - `datasource_type` in `dataset_info` was set as `view` if the table was a 
virtual table, which caused an exception when importing virtual datasets. Since 
virtual datasets are in fact regular `table` datasources, we just reference the 
`datasource_type` of the imported dataset.
   
   ### SCREENSHOT
   Now native filter targets are referencing `datasetUuid` instead of 
`datasetId`:
   
![image](https://user-images.githubusercontent.com/33317356/127825419-d0e82a8e-19c3-4afa-87c0-77ee4bd2f4ce.png)
   
   ### TESTING INSTRUCTIONS
   
   1. enable the "VERSIONED_EXPORT" feature flag
   2. export a dashboard that had only one chart and two native filters, one 
referencing the same dataset as the chart and another not referenced by the 
chart
   3. check that the native filter configurations in the dashboard metadata 
contain `datasetUuid` instead of `datasetId` references
   4. delete the exported dashboard, chart and dataset only referenced by the 
native filter
   5. import the exported bundle
   6. make sure the imported dashboard works correctly, and that both datasets 
are imported correctly and native filter configurations are correct
   
   ### ADDITIONAL INFORMATION
   <!--- Check any relevant boxes with "x" -->
   <!--- HINT: Include "Fixes #nnn" if you are fixing an existing issue -->
   - [x] Has associated issue: closes #15484 , closes #15531
   - [ ] Changes UI
   - [ ] Includes DB Migration (follow approval process in 
[SIP-59](https://github.com/apache/superset/issues/13351))
     - [ ] Migration is atomic, supports rollback & is backwards-compatible
     - [ ] Confirm DB migration upgrade and downgrade tested
     - [ ] Runtime estimates and downtime expectations provided
   - [ ] Introduces new feature or API
   - [ ] Removes existing feature or API
   


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