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Thumbnail error when adding item via Python API

GarethBaker1

I have a map service (ArcGIS Server 10.2.2) containing a number of layers, each of which I want to add to my Portal (10.5) via the Python API. The server is not federated with the Portal.

If I manually add the URL for the individual layer then it successfully creates a content item and automatically creates a thumbnail for me showing a snapshot of the data.

However if I use the Python API to add the same URL into a different content item then a thumbnail is not generated. When I go to the content item in Portal it shows an error at the top of the page - see image below:

Error seen when trying to display a thumbnail for an item that has been added via the Python API

This disappears if I click anywhere near it but returns again if I refresh the page. If I manually edit the thumbnail and upload an image from my PC then I don't see the error again.

So I have two questions:

1. Is it possible for a thumbnail to be automatically generated for me when I create an item via the Python API?

2. If it can't be generated automatically then how can I specify an image file from my PC to be uploaded instead? Or can the image only be referenced by a URL?

For info a sample of my code is below.

layer_properties={
'title':'Test thumb',
'description':Test description.',
'snippet':Test summary.',
'tags':test',
'type':'Feature Service',
'url':'https://myserver/mywebadaptor/rest/services/environmental/designations/MapServer/7'
}
myLayer = gis.content.add(item_properties=layer_properties)
myLayer

I've looked at the API reference here but there is no example for me to follow
http://esri.github.io/arcgis-python-api/apidoc/html/arcgis.gis.html#contentmanager

Thanks

Gareth

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Accepted answers

Anonymous User

You can request the server to create a thumbnail using the export_map method. Once you have a thumbnail, either through export_map or a file on local disk, you can specify that in the 'thumbnail' argument of the 'add' method. Refer to this api reference: arcgis.gis.ContentManager.add

Alternately, you can update an existing item and specify the thumbnail. Refer to this example: managing your content | ArcGIS for Developers

All comments

GarethBaker1

Thanks Atma. I did see that page during my initial research but disregarded it because it didn't specifically mention adding a content item from a loosely coupled ArcGIS Server via URL. With the benefit of hindsight I can see that the thumbnail example would have been useful despite it relating to a CSV file in that case. Thanks for all your speedy replies on the matter, very helpful.

Anonymous User

Thanks Gareth, we are working toward refining the API ref doc and will take this into consideration. Meanwhile, I could have sent you this guide topic: Accessing and creating content | ArcGIS for Developers which explains how to set a thumbnail at the time of creating a new item. Was this something you were looking for originally?

GarethBaker1

Thanks Atma. I think your second link to the API reference is probably the same as I put at the bottom of my original question. My comment about not having a useful worked example on that page is I think still valid but thankfully the managing your content example has useful guidance on how to specify a path on my local PC for the thumbnail.

Anonymous User

Alternately, you can update an existing item and specify the thumbnail. Refer to this example: managing your content | ArcGIS for Developers

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