GPSQLExpression - python toolbox

Question

I am relatively new to python and I am trying to build a tool within python toolbox with GPSQLExpression as parameter.

I am having trouble with populating its field and value list. Below is part of my code, I put it in updateParameters.

Feature classes in geodatabase were made from OSM data.

def getParameterInfo(self):
    """Define parameter definitions"""

    p1 = arcpy.Parameter(
        displayName = "In gdb",
        name = "in_gdb",
        datatype = "DEWorkspace",
        parameterType = "Required",
        direction = "Input")

    p2 = arcpy.Parameter(
        displayName = "Geometry type",
        name = "userinput",
        datatype = "GPString",
        parameterType = "Required",
        direction = "Input",
        multiValue = False)

    p2.filter.type = "ValueList"    
    p2.filter.list = ['pt','ln','ply']


    p3 = arcpy.Parameter(
        displayName ="Selected fc",
        name = "fcs_of_gdb",
        datatype = "GPFeatureLayer",
        parameterType = "Required",
        direction = "Input",
        multiValue = True)

    p4 = arcpy.Parameter(
        displayName = "Pick counties",
        name = "colli",
        datatype = "GPString",
        parameterType = "Required",
        direction = "Input",
        multiValue = True)

    p4.filter.type = "ValueList"


    p5 = arcpy.Parameter(
        displayName = "Select Feature Layer",
        name = "fl_gdb",
        datatype = "GPFeatureLayer",
        parameterType = "Required",
        direction = "Input")


    p6 = arcpy.Parameter(
        displayName = "SQL Expresssion",
        name = "expres",
        datatype = "GPSQLExpression",
        parameterType = "Required",
        direction = "Input",
        multiValue = False)

    p6.parameterDependencies = [p5.name]

    p = [
        p1, p2, p3,
        p4, p5, p6
    ]
    return p

Below I attached 2 screenshots from ArcGIS Pro. When I type for ex. highway or any other field name from OSM data scheme - it is fine, no errors, but when I try to write whole SQL expression, error shown below appears and also I cannot compose SQL expression using drop down list, because it is empty.

Any ideas how to write whole SQL expression?

Below error message:

ERROR 000800 The value is not a member of OBJECTID | Shape | highway | building | natural | waterway | amenity | landuse | place | railway | boundary | power | leisure | man_made | shop | tourism | route | historic | aeroway | aerialway | barrier | military | geological | OSMID | osmuser | osmuid | osmvisible | osmversion | osmchangeset | osmtimestamp | osmMemberOf | osmTags | osmSupportingElement | osmMembers | Shape_Length.

EDIT:

Removed meaningless code, fixed bugs. Now code is working properly.

Answer 1

OK so you are new to python. You have made a fundamental mistake when asking help with code. You have not provided all the code so none of us really know whats the problem...

You have provided images (that's good) but not given us the full story (not good)...

Soo...that said I think you are barking up the wrong tree. Populating a filter makes no sense when an SQL expression is more than just a field name. It's a field-operator-value construct.

I believe the issue is to do with how you define your parameters (but as you have not shown us any of that code I can only assume this is the case...)

When I set the dependency property to the layer then the SQL parameter behaves as expected. No need to pointlessly add fields to a list. See the example below.

def getParameterInfo(self):
    """Define parameter definitions"""
    p0 = arcpy.Parameter("p0","Layer","Input","GPFeatureLayer","Required",True)
    p1 = arcpy.Parameter("p1","SQl Parameter","Input","GPSQLExpression","Required",True)
    p1.parameterDependencies = [p0.name]
    params = [p0,p1]
    return params

Other parameters that make use of the dependency property are discussed in this section of the help file.

UPDATE

Full toolbox code:

import arcpy

class Toolbox(object):
    def __init__(self):
        """Define the toolbox (the name of the toolbox is the name of the
        .pyt file)."""
        self.label = "Toolbox"
        self.alias = ""

        # List of tool classes associated with this toolbox
        self.tools = [Tool]

class Tool(object):
    def __init__(self):
        """Define the tool (tool name is the name of the class)."""
        self.label = "Tool"
        self.description = ""
        self.canRunInBackground = False

    def getParameterInfo(self):
        """Define parameter definitions"""
        """Define parameter definitions"""
        p0 = arcpy.Parameter("p0","Layer","Input","GPFeatureLayer","Required",True)
        p1 = arcpy.Parameter("p1","SQl Parameter","Input","GPSQLExpression","Required",True)
        p1.parameterDependencies = [p0.name]
        params = [p0,p1]
        return params

    def isLicensed(self):
        """Set whether tool is licensed to execute."""
        return True

    def updateParameters(self, parameters):
        """Modify the values and properties of parameters before internal
        validation is performed.  This method is called whenever a parameter
        has been changed."""

    def updateMessages(self, parameters):
        """Modify the messages created by internal validation for each tool
        parameter.  This method is called after internal validation."""
        return

    def execute(self, parameters, messages):
        """The source code of the tool."""
        return

Here is the tool running as expected: