update function for webmap doesn't work (but no error is given) about arcgis-python-api HOT 5 CLOSED

thank you for your reply. In the end I want to update a webmap based on a json file, so saving it as a new one doesnt do the trick in my case. I'm looking forward to your workflow!

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@artsmax
There is no key "text" in the item properties that allows you to do this. I will try to find you a workflow and post it here.

But if you are simply trying to copy webmap1 into a new webmap then you can simply save() which will create a new webmap item and not update the original.

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@nanaeaubry , I would still like to see your workflow:) Are you able/willing to share? regards, Max

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@artsmax
Thanks for being patient! I got the update to work but have a few caviats to make you aware of as well.

Here is the code:

from arcgis.gis import GIS
from arcgis.mapping import WebMap
import json
gis = GIS(profile="your_online_profile")

# Get the two webmap items we want to use
item1 = gis.content.get("fa14b6470a8845aca963051e57c2f4bb")
item2 = gis.content.get("6093ff378f2546bea2159ab7beae0569")


# Use the data from symbol_webmap to update the basic_webmap
data = item2.get_data()
item1.update({"text":json.dumps(data)})
item1

You were on the right track to use the json data of the item and pass as text. However, the update should be done on the Item class and not the WebMap class. In the Item class we accept 'text' as a key in the item_properties dictionary.

This will work BUT it depends on your use case. I tested this where I had a feature layer in two different webmaps. In one webmap I left it as-is and in another I updated the symbology and saved it. Then when I did the update above the basic webmap got updated with the cool symbology.
This will work if you have the same feature layers in your webmap. This will not work if you have different feature layers and you want to apply the symbology of one layer to a totally different layer.
The reason is that the underlying structures are dictionaries. So this is a dictionary updating another dictionary and the rules for that apply. You might have to do a bit of manual search and replace if you want to apply to more complicated use cases.

Hope this helps jump start what you are trying to do! :) Good luck!

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thank you very much! Exactly what I was looking for:)

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