Issue with only one feature layer adding to map when using SetParameter/SetParameterAsText

[MitchellAspinall]

I am having an issue with a recent script/toolbox I have developed. My aim is to perform some tasks (copy features, then add them to the map then symbolise them). The majority of the tasks complete successfully, however, only the last feature layer adds to the map. I think the error is being generated as the "arcpy.SetParameter" function is not a global variable, therefore it only works on the last feature layer. 

import arcpy
import os 
from arcpy.mp import *
from arcpy import env

arcpy.env.addOutputsToMap = True

# User input feature 
GDB_Store = arcpy.GetParameterAsText(0)

# Define the name of the project (long and clunky process -so could be improved)
aprox = arcpy.mp.ArcGISProject("CURRENT")
username = os.getlogin()

# Field Points that will be used
ISOs =  r'C:\Users\{}\xxx\xxx\Collector Template.gdb\Artefact_Data\ISOs'.format(username)
New_Site_Boundary = r"C:\Users\{}\xxx\xxx\Collector Template.gdb\Collector Template.gdb\Heritage_Site_Boundary\Site_Boundary".format(username)
NEW_Feature_Polygon = r"C:\Users\{}\xxx\xxx\Collector Template.gdb\Collector Template.gdb\Features\NEW_Feature_Polygon".format(username)
NEW_Feature_Point = r"C:\Users\{}\xxx\xxx\Collector Template.gdb\Collector Template.gdb\Features\NEW_Feature_Point".format(username)
NEW_Feature_Line = r"C:\Users\{}\xxx\xxx\Collector Template.gdb\Collector Template.gdb\Features\NEW_Feature_Line".format(username)
Sample_Salvage_Squares = r"C:\Users\{}\xxx\xxx\Collector Template.gdb\Collector Template.gdb\Artefact_Data\Sample_Salvage_Squares".format(username)
New_Artefact_Point = r"C:\Users\{}\xxx\xxx\Collector Template.gdb\Collector Template.gdb\Artefact_Data\Artefact_Point".format(username)
New_Site_Boundary_Point = r"C:\Users\{}\xxx\xxx\Collector Template.gdb\Collector Template.gdb\Heritage_Site_Boundary\Site_Boundary_Points".format(username)

#set symbology paths 
ISOs_Sym = r"C:\Users\{}\xxx\xxx\Collector Template.gdb\Symbology\ISOs.lyrx".format(username)
New_Site_Boundary_Sym = r"C:\Users\{}\xxx\xxx\Collector Template.gdb\Symbology\New Site Boundary.lyrx".format(username)
NEW_Feature_Polygon_Sym = r"C:\Users\{}\xxx\xxx\Collector Template.gdb\Symbology\NEW_Feature_Polygon.lyrx".format(username)
NEW_Feature_Point_Sym = r"C:\Users\{}\xxx\xxx\Collector Template.gdb\Symbology\New Feature Points.lyrx".format(username)
NEW_Feature_Line_Sym = r"C:\Users\{}\xxx\xxx\Collector Template.gdb\Symbology\NEW_Feature_Line.lyrx".format(username)
Sample_Salvage_Squares_Sym = r"C:\Users\{}\xxx\xxx\Collector Template.gdb\Symbology\Sample - Salvage Squares.lyrx".format(username)
New_Artefact_Point_Sym = r"C:\Users\{}\xxx\xxx\Collector Template.gdb\Symbology\Artefact Point.lyrx".format(username)
New_Site_Boundary_Point_Sym =r"C:\Users\{}\xxx\xxx\Collector Template.gdb\Symbology\New Site Boundary Points.lyrx".format(username)

# Create static layer lists 
static_layers = [ISOs, New_Site_Boundary, NEW_Feature_Polygon, NEW_Feature_Point, NEW_Feature_Line, Sample_Salvage_Squares, New_Artefact_Point, New_Site_Boundary_Point]
static_layers_sym = [ISOs_Sym, New_Site_Boundary_Sym, NEW_Feature_Polygon_Sym, NEW_Feature_Point_Sym, NEW_Feature_Line_Sym, Sample_Salvage_Squares_Sym, New_Artefact_Point_Sym, New_Site_Boundary_Point_Sym]
static_layer_name = ["ISOs", "New Site Boundary", "NEW Feature Polygon", "NEW Feature Point", "NEW Feature Line", "Sample Salvage Squares", "New Artefact Point", "New Site Boundary Point"]
static_layer_name_store = ["ISOs", "New_Site_Boundary", "NEW_Feature_Polygon", "NEW_Feature_Point", "NEW_Feature_Line", "Sample_Salvage_Squares", "New_Artefact_Point", "New_Site_Boundary_Point"]


# define model for static layers

def Model1(static_layers, static_layer_name, static_layer_name_store, static_layers_sym):  # Model1
    # Define location and name of feature layers
    feature_path = GDB_Store + "\\" + static_layer_name_store
    
    # Copy the feature layers
    arcpy.management.CopyFeatures(in_features=static_layers, out_feature_class=feature_path, config_keyword="", spatial_grid_1=None, spatial_grid_2=None, spatial_grid_3=None)

    # Process: Make Feature Layer (Make Feature Layer) (management)
    layer_e = static_layer_name
    arcpy.management.MakeFeatureLayer(in_features=feature_path, out_layer=layer_e, where_clause="", workspace="", field_info="OBJECTID OBJECTID VISIBLE NONE;SHAPE SHAPE VISIBLE NONE;Art_ID Art_ID VISIBLE NONE;Type Type VISIBLE NONE;Notes Notes VISIBLE NONE")

    # Add layers to map
    arcpy.SetParameter(1, static_layer_name)

    # Process: Apply Symbology From Layer (Apply Symbology From Layer) (management)
    arcpy.management.ApplySymbologyFromLayer(in_layer=layer_e, in_symbology_layer=static_layers_sym, symbology_fields=[], update_symbology="DEFAULT")[0]


# Run feature layers
if __name__ == '__main__':
    with arcpy.EnvManager(scratchWorkspace=GDB_Store, workspace=GDB_Store):
        for r, x, y, z in zip(static_layers, static_layer_name, static_layer_name_store, static_layers_sym):
            Model1(r, x, y, z)

I have attempted to add the "SetParamaterAsText" function outside of the function, but this has had limited success. Any suggestions would be greatly appreciated. 

[HaydenWelch]

What is the exact error it's raising? And it's not being raised on every iteration of the model?

[JakeSkinner]

Hi @MitchellAspinall ,

Try adding the layer using the addLayer method.  Below is an example:

import arcpy

# Reference Project and Map
aprx = arcpy.mp.ArcGISProject("CURRENT")
m = aprx.listMaps("*")[0]

# Create Feature Layer
arcpy.AddMessage("Create feature layer")
featureLayer = arcpy.MakeFeatureLayer_management(r"C:\TEMP\Python\Test.gdb\Earthquakes", "EarthquakesLyr")

# Add Layer to Map
arcpy.AddMessage("Add layer to map")
layer = featureLayer.getOutput(0)
m.addLayer(layer)

[MitchellAspinall · Accepted solution]

Hi Guys, 

It seems that the issue was with only using one index as the SetParameter variable. I used a list of numbers so that each time the for loop iterates through the function, there is a new number assigned to the SetParameter variable, for example: 

The first iteration is 

SetParameter(1, XXX)

The second is

SetParameter(2, XXX)

etc

I also swapped ApplySymbologyFromLayer to SetParameterSymbology. 

Please see the example code below, and hopefully it can be useful to someone!

feature_count = [14, 15, 16, 17, 18, 19, 20, 21]

# define model for feature layers 
def feature_layer_tool(feature_layers, feature_layer_names,feature_layer_names_store, feature_layers_sym,feature_count):  # Model
    # To allow overwriting outputs change overwriteOutput option to True.
    arcpy.env.overwriteOutput = True

    # Process: Select Layer By Location (Select Layer By Location) (management)
    layerA = arcpy.management.SelectLayerByLocation([feature_layers], overlap_type="WITHIN_A_DISTANCE", select_features=Survey_Area_shp, search_distance=Distance, selection_type="NEW_SELECTION", invert_spatial_relationship="NOT_INVERT",)

    # Process: Copy Features (Copy Features) (management)
    layerB = GDB_Store + "\\" + feature_layer_names_store
    arcpy.management.CopyFeatures(in_features=layerA, out_feature_class=layerB, config_keyword="", spatial_grid_1=None, spatial_grid_2=None, spatial_grid_3=None)

    # Process: Make Feature Layer (Make Feature Layer) (management)
    layerC = feature_layer_names
    arcpy.management.MakeFeatureLayer(in_features=layerB, out_layer=layerC, where_clause="")
    
    #add the layer to the map using set paramter
    arcpy.SetParameter(feature_count, feature_layer_names)

    # Process: Apply Symbology From Layer (Apply Symbology From Layer) (management)
    arcpy.SetParameterSymbology(feature_count,feature_layers_sym)