How to update a definition query in a web map using python arcpy

SanchezNuñez — Fri, 07 Feb 2025 19:00:16 GMT

Good afternoon

I am trying to update the definition query of two layers using arcpy python

For testing purposes, I am resetting the query, but nothing happens

from arcgis.gis import GIS
from arcgis.mapping import WebMap

gis = GIS("Pro")

webmap_item = gis.content.get("-..webmapid....")

web_map = WebMap(webmap_item)

# Get all layers from the web map

for layer in web_map.layers:
print(layer.title)
if layer.title == "first layer":
layer.definitionQuery = None
if layer.title == "second layer":
layer.definitionQuery = None

webmap_item.update() ==>> It looks like this update does not work

Re: How to update a definition query in a web map using python arcpy

DavidPike — Fri, 07 Feb 2025 21:20:46 GMT

It's been a while but I think the Webmap doesn't contain feature layers where you can update line that. It's a big block of JSON - could be wrong however . I'd try something like:

for layer in web_map.definition["operationalLayers"]: if layer["title"] in ["first layer", "second layer"]: if "layerDefinition" in layer: layer["layerDefinition"]["definitionExpression"] = "<insert definition query>" webmap_item.update({"text": json.dumps(web_map.definition)})

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How to update a definition query in a web map using python arcpy

Re: How to update a definition query in a web map using python arcpy