map.toJSON() not exporting feature layers data

ManuelGomez

I pull data from a web map that's transitioning to a different end point with updated information and layers. Before, I used to be able to save the whole map to JSON including all feature layers and their features using the map.toJSON() method. In the new web map, I get the map's information (basemapLayers, spatialReference, etc.) and links to the feature layers REST end points, but not the actual data in the layers.

I use this toJSON() to cache the feature layers since they're small enough and has worked great in the past because they only change every few weeks, saving queries to the server.

I'm using iOS SDK 100.6.

What can be causing this? Any server side configuration?

EDIT:

Sample of new layer information when downloading the map:

"operationalLayers" : [
{
"itemId" : "xyz",
"layerType" : "ArcGISFeatureLayer",
"visibility" : true,
"id" : "xyz",
"title" : "xyz",
"opacity" : 0.88,
"url" : "https:\/\/services.arcgis.com\/xyz\/arcgis\/rest\/services\/xyz\/FeatureServer\/0"
},

...

Sample of old layer information:

"operationalLayers" : [
{
"visibility" : true,
"id" : "xyz",
"title" : "xyz",
"layerType" : "ArcGISFeatureLayer",
"opacity" : 0.80000000000000004,
"featureCollection" : {
"layers" : [
{
"featureSet" : {
"geometryType" : "esriGeometryPolygon",
"features" : [
{
"attributes" : {
...
},
"geometry" : {
"rings" : [
[
...
]
],
"spatialReference" : {
"latestWkid" : 3857,
"wkid" : 102100
}
}
},
...
]
},
"layerDefinition" : {
"allowGeometryUpdates" : true,
"hasZ" : false,
"maxScale" : 0,
"supportedQueryFormats" : "JSON, geoJSON",
"isDataVersioned" : false,
"drawingInfo" : {
"fixedSymbols" : true,
"renderer" : {
"type" : "simple",
"symbol" : {
"outline" : {
"style" : "esriSLSSolid",
"type" : "esriSLS",
"width" : 3,
"color" : [
38,
115,
0,
255
]
},
"style" : "esriSFSSolid",
"type" : "esriSFS",
"color" : [
38,
115,
0,
88
]
}
},
"transparency" : 0,
"labelingInfo" : [
{
...
}
]
},
"extent" : {
"xmin" : -999999,
"xmax" : -999999,
"spatialReference" : {
"latestWkid" : 3857,
"wkid" : 102100
},
"ymin" : 999999,
"ymax" : 999999
},
"hasAttachments" : false,
"objectIdField" : "xyz",
"supportsRollbackOnFailureParameter" : true,
"name" : "xyz",
"geometryType" : "esriGeometryPolygon",
"supportsAdvancedQueries" : true,
"capabilities" : "Create,Delete,Query,Update,Editing",
"supportsStatistics" : true,
"type" : "Feature Layer",
"hasM" : false,
"minScale" : 3988894,
"supportsAttachmentsByUploadId" : true,
"supportsCalculate" : true,
"defaultVisibility" : true,
"supportsValidateSql" : true,
"spatialReference" : {
"latestWkid" : 3857,
"wkid" : 102100
},
"fields" : [
{
"editable" : false,
"alias" : "xyz",
"length" : 0,
"name" : "xyz",
"nullable" : false,
"type" : "esriFieldTypeOID"
},
...
],
"hasStaticData" : false,
"currentVersion" : 10.41
},
"nextObjectId" : 89,
"popupInfo" : {
"showAttachments" : false,
"title" : "xyz",
"fieldInfos" : [
{
"format" : {
"places" : 0,
"digitSeparator" : true
},
"stringFieldOption" : "textbox",
"isEditableOnLayer" : false,
"visible" : false,
"isEditable" : false,
"label" : "xyz",
"fieldName" : "xyz"
},
...
]
},
"title" : "xyz"
}
],
"showLegend" : true
}
}

Nicholas-Furness

Hi.

In the old JSON, you had a map with a featureCollection in it. That is a specific type of FeatureLayer which is, essentially, an in-memory feature layer. When the WebMap is serialized to JSON, you'll see the features included.

In your new JSON, your map is pointing to a feature service. The JSON represents the connection to the service, and the content is obtained by the Runtime as needed as you pan around the map. However, it's not serialized.

You should see the same JSON for 100.5 and 100.6 in each case. It looks like you're using a different map in the two cases.

Let me know if this helps.