AGOLに7559ポイントのホストされたフィーチャ レイヤーがあります。さらに1000ポイントを作成し、それらをホストされたフィーチャ レイヤーに追加したいと考えました。スキーマは、更新対象の同じフィーチャ レイヤーからダウンロードしたため、完全に一致していました。<\/P>
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ホストされたフィーチャ レイヤー用の新しいUpdate data機能を使用しました。 <\/P>
更新を適用したところ、以前のすべてのポイントが削除され、新しいポイントのみが表示されました。<\/P>
なぜこのようなことが起こったのでしょうか?<\/P>
古いポイントを復元する方法はありますか?<\/P>
サービスURLは次のとおりです:<\/P>
https:\/\/services8.arcgis.com\/WviT8ecuvqxI4l6m\/arcgis\/rest\/services\/freatydrom04\/FeatureServer\/0?token=tzy3UIJMmsmeJAeZwn6#8230;<\/A> <\/P><\/BODY><\/HTML>
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…
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.
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.
Hi Katie,
Do you know the outcome of this? I have a situation where I may be using append and I'm worried about losing data after reading this.
Thanks,
Shana
Hello,
This is something that should be looked into and investigated via a Support case. If you are located outside the US please contact your distributor and request a case. If you have issues please let me know.
- Katie
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