Připojení v hosted feature layer způsobilo ztrátu dat

Question

<\/HEAD>Existuje hosted feature layer s 7559 body v AGOL. Vytvořili jsme dalších 1000 a chtěli je připojit k hosted feature layer. Schéma bylo perfektně shodné, protože bylo staženo ze stejného feature layer, který měl být aktualizován.<\/P> <\/P> Použil jsem novou funkci Update data pro hosted feature layers. <\/P> <\/P> Když jsem aplikoval aktualizace, všechny předchozí body byly smazány a viděl jsem pouze nové.<\/P> Proč k tomu mohlo dojít? <\/P> Existuje nějaký způsob, jak získat staré body zpět? <\/P> URL služby je:<\/P> https:\/\/services8.arcgis.com\/WviT8ecuvqxI4l6m\/arcgis\/rest\/services\/freatydrom04\/FeatureServer\/0?token=tzy3UIJMmsmeJAeZwn\u2026<\/A> <\/P><\/BODY><\/HTML>

KellyGerrow · Answer

Thanks Kostas,

As Katie Cullen  mentioned, Append does not cause a loss of data as existing fields are updated and never deleted. If incorrect information is appended and the wrong values are updated to the wrong fields,it's never a bad idea to create a back up of your data when performing large append operations. With bulk operations it can be difficult to review every feature before appending, and having a back up handy can make life easier if the wrong data is appended.

Check out Paul Barker‌'s blogs about append:

https://www.esri.com/arcgis-blog/products/arcgis-online/uncategorized/whats-new-with-hosted-feature-layers-getting-to-kn…

KostasFrantzios1 · Answer

Support was able to retrieve all the data so there was no actual damage. However as Katie mentioned you should try it in a test feature layer and export a backup of your data.

Anonymous User · Answer

The analyst on this case was never able to reproduce data loss with the append tool as described above. Furthermore here in Support we have not received any other reports of data loss as a result of running the Append tool.

If you want to be super safe you can always export a back up of the service to File Geodatabase or Shapefile before running the tool.