Arcgis Python Api to create field map smartforms

Question

I have been asked to create field map smartforms from the hosted feature layer & webmap.

Any example would be helpful!

My code seems to be not working, it does not create Form element.

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



_username= "<USERNAME>"
_password = "<PASSWORD>"
_url = "https://<test>.maps.arcgis.com/"   
gis = GIS(_url,_username,_password)

web_map_id = "790yym22618g2488a2b67adc300op38a" 
web_map_item = gis.content.get(web_map_id)
web_map = WebMap(web_map_item)


layer = web_map.definition["operationalLayers"][0]

feature_layer = FeatureLayer(layer['url'])

fields = feature_layer.properties.fields

# Filter out system fields like ObjectID, GlobalID, etc.
excluded_fields = ['objectid', 'globalid', 'created_user', 'created_date', 'last_edited_user', 'last_edited_date']
form_elements = []

for field in fields:
    field_name = field['name'].lower()
    if field_name in excluded_fields or field['type'] in ['esriFieldTypeOID', 'esriFieldTypeGlobalID']:
        continue
    
    form_elements.append({
        "type": "field",
        "fieldName": field['name'],
        "label": field.get('alias', field['name']),
        "required": not field.get('nullable', True),
        "visible": True
    })

# --- STEP 4: Construct the formInfo ---
form_info = {
    "expressionInfos": [],
    "lastEditInfos": {
        "authoringApp": "ArcGIS API for Python",
        "authoringAppVersion": "2.2.0",
        "editingTool": "Form"
    },
    "formElements": [
        {
            "type": "group",
            "label": "Auto-generated Form",
            "description": "Fields from Hosted Feature Layer",
            "visible": True,
            "formElements": form_elements
        }
    ],
    "version": 1
}

# --- STEP 5: Update the Web Map layer with formInfo ---
layer["popupInfo"] = {
    "title": "{%s}" % form_elements[0]["fieldName"],  # Use the first field as title
    "fieldInfos": [],
    "description": "",
    "expressionInfos": [],
    "formInfo": form_info
}

# --- STEP 6: Save the web map ---
web_map.update()
print("✅ FormInfo has been created and attached to the Web Map.")```

Clubdebambos · Accepted Answer · 2025-09-12 15:39:30Z

When manipulating the WebMap JSON you need to update the WebMap Ttem object and not the WebMap object (Map object from version 2.4.0).

web_map_item = gis.content.get(web_map_id)

## get the WebMap JSON definition as a dictionary
## same as WebMap.definition but this is removed in 2.4.0+
## so this way is future proffed
web_map_item_data = web_map_item.get_data()

## get the layer definition
layer = web_map_item_data["operationalLayers"][0]

"""
    create the Form JSON (dict)
    form_info = {your_definition}
"""

## apply the form definition to the layer
layer["formInfo"] = form_info

## update the layer in the overall WebMap definition
web_map_item_data["operationalLayers"][0] = layer

## update the WebMap
item_properties = {"text":web_map_item_data}
web_map_item.update(item_properties=item_properties)

All the best, Glen Final Draft Mapping

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