https://community.esri.com/t5/arcgis-online-questions/create-list-domain-again-after-previously-deleted/m-p/1019647#M38159 <P>I've definitely had this happen, too. Perhaps someone else has an alternate method, but the only way I could re-apply a list was to use Python to directly edit the service properties, as described in the <A href="https://developers.arcgis.com/python/api-reference/arcgis.features.managers.html#arcgis.features.managers.FeatureLayerManager" target="_self">Feature Layer Manager section of the python API docs</A>.</P><P>A big caveat: direct modifications to the service JSON can be risky. The service won't always <EM>let</EM> you make modifications if your input isn't formatted correctly, but it's quite possible to apply edits to the wrong layer, field, etc.</P><P>Also: to help you format your update, refer to the JavaScript docs for the Update Definition command, <A href="https://developers.arcgis.com/rest/services-reference/update-definition-feature-layer-.htm#ESRI_SECTION2_3A549061A5E54E9A85A180E823202024" target="_self">especially example 6</A>, in which a field domain is edited.</P><P>Your code might look something like this:</P><LI-CODE lang="python">from arcgis.gis import GIS from arcgis.features.managers import FeatureLayerManager gis = GIS('your-portal-url', 'your-username') flm = FeatureLayerManager.fromitem(gis.content.get('your-layer-itemID'), your-layer-index) update_json = { "fields": [ { "name": "your-field", "domain": { "type": "codedValue", "name": "domain-name", "codedValues": [ { "name": "Coded Value 1", "code": "Code_1" }, ... } ] }, "defaultValue": null } ] } flm.update_definition(update_json)</LI-CODE><P>&nbsp;</P><P>If you prefer using the Portal's interface for modifying your list, it should be possible to use this to establish the existence of the list with only a single value, then go into the <STRONG>Field</STRONG> view in your Portal to add other codes to it.</P><P>Good luck!</P> Mon, 25 Jan 2021 15:06:14 GMT jcarlson 2021-01-25T15:06:14Z https://community.esri.com/t5/arcgis-online-questions/create-list-domain-again-after-previously-deleted/m-p/1019521#M38149 <P>I've previously created domain in ArcGIS Online by clicking the 'create list'. But then I deleted the list because I decided not to apply domain to the attribute list. Now I want to apply the domain back. However, the 'create list' button is no longer there. How to create list again after previously deleted it?</P><P>Attached together is the screenshot</P> Mon, 25 Jan 2021 03:35:01 GMT https://community.esri.com/t5/arcgis-online-questions/create-list-domain-again-after-previously-deleted/m-p/1019521#M38149 frhilyana_geo11 2021-01-25T03:35:01Z https://community.esri.com/t5/arcgis-online-questions/create-list-domain-again-after-previously-deleted/m-p/1019647#M38159 <P>I've definitely had this happen, too. Perhaps someone else has an alternate method, but the only way I could re-apply a list was to use Python to directly edit the service properties, as described in the <A href="https://developers.arcgis.com/python/api-reference/arcgis.features.managers.html#arcgis.features.managers.FeatureLayerManager" target="_self">Feature Layer Manager section of the python API docs</A>.</P><P>A big caveat: direct modifications to the service JSON can be risky. The service won't always <EM>let</EM> you make modifications if your input isn't formatted correctly, but it's quite possible to apply edits to the wrong layer, field, etc.</P><P>Also: to help you format your update, refer to the JavaScript docs for the Update Definition command, <A href="https://developers.arcgis.com/rest/services-reference/update-definition-feature-layer-.htm#ESRI_SECTION2_3A549061A5E54E9A85A180E823202024" target="_self">especially example 6</A>, in which a field domain is edited.</P><P>Your code might look something like this:</P><LI-CODE lang="python">from arcgis.gis import GIS from arcgis.features.managers import FeatureLayerManager gis = GIS('your-portal-url', 'your-username') flm = FeatureLayerManager.fromitem(gis.content.get('your-layer-itemID'), your-layer-index) update_json = { "fields": [ { "name": "your-field", "domain": { "type": "codedValue", "name": "domain-name", "codedValues": [ { "name": "Coded Value 1", "code": "Code_1" }, ... } ] }, "defaultValue": null } ] } flm.update_definition(update_json)</LI-CODE><P>&nbsp;</P><P>If you prefer using the Portal's interface for modifying your list, it should be possible to use this to establish the existence of the list with only a single value, then go into the <STRONG>Field</STRONG> view in your Portal to add other codes to it.</P><P>Good luck!</P> Mon, 25 Jan 2021 15:06:14 GMT https://community.esri.com/t5/arcgis-online-questions/create-list-domain-again-after-previously-deleted/m-p/1019647#M38159 jcarlson 2021-01-25T15:06:14Z