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Mean for all values Portal/Arcade

JoeBorgione

Yesterday, I posted https://community.esri.com/thread/235847-mean-for-all-features-not-just-one-arcade and I was able to find the solution I was after, in ArcPro. But apparently, using $layer is not supported in Portal.

From yesterdays post: I have a polygon feature class representing Meals on Wheels data by month/zipcode: imagine a 'stacked' set of polygons. When I identify a given zipcode polygon, the pop up returns 12 values (one per month). That's fine but I'd like to show the mean of all 12 months.

I published the data to our internal portal but now when I try to use the same approach as in PRO, I get an error:

Some day I'll get a grasp on Arcade and what it can do, and where, and when...

Xander Bakker

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XanderBakker

What version of Enterprise do you have?

XanderBakker

Hi jborgion ,

As a side note...

Have a look at the different Arcade expression profiles. (I took these from https://developers.arcgis.com/arcade/playground/ )

# Alias
- will only provide access to the $value

# Attribute Rules (Calculation, Constraint and Validation)
- $feature and $datastore (so you can acccess other layers and features)
- no access to Attachments and FeatureSetByPortalItem

# Constraint
- access to Feature attributes and geometry
- no access to Attachments, FeatureSet*, Filter and OrderBy

# Feature Z
- access to Feature attributes and geometry
- no access to Attachments, FeatureSet*, Filter and OrderBy

# Field Calculate
- access to $feature, $datastore and $layer
- access to Attachments, FeatureSet*, Filter, OrderBy and all other functions

# Labeling
- access to Feature attributes and geometry
- no access to Attachments, FeatureSet*, Filter and OrderBy

# Popup
- access to $feature, $datastore, $map and $layer
- no access to Attachments and FeatureSetByPortalItem

# Visualization
- access to Feature attributes, geometry and $view.scale
- no access to Attachments, FeatureSet*, Filter and OrderBy

Functionality will depend on version of the software (Pro and Portal in Enterprise). As far as I can deduce the Arcade functionality will first appear in ArcGIS Online, then in Pro and lastly in Enterprise. Some things are currently only available in Pro (like Attribute Rules and this requires using an Enterprise Geodatabase).

JoeBorgione

10.6.1

From your post above....

# Popup
- access to $feature, $datastore, $map and $layer
- no access to Attachments and FeatureSetByPortalItem

rats....

XanderBakker

I think in 10.6.1 you should have access to FeatureSetBy functions (you can still use the $map and $datastore to access the layer). So the fact that the FeatureSetByPortalItem is not available should not be a restriction. Wait.. the FeatureSetBy* functions were introduced in AGOL in december 2018, so they were not available until this April in Enterprise. So probably not available 10.6.1

The easiest way to check this is to enter the pop-up configuration of a layer in your web map and in the Arcade expression window you will see which functions are available and which are not. FeatureSetByPortalItem is just another way of accessing an item, but it is not the only way to do that.

JoeBorgione

I've been looking at the $map and $datastore global variables, but I don't see an actual syntax on how to use them. Here is one situation I'd like to solve: I need the ratio of attributes from two different layers:

FeatureLayer_1, Attribute_1 divided by FeatureLayer_2, Attribute_2

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