Filter feature layer paramter based on attributes

MortenBackNielsen

Is it possible to filter the available feature layers for a parameter based on the attribute table the same way we can filter based on the shape type:

 

# Define the sample paramter
Samples = arcpy.Parameter(
    displayName="SamplePoints",
    name="SamplePoints",
    datatype="GPFeatureLayer",
    parameterType="Required",
    direction="Input")
# Require the sample to be Points
Samples.filter.list = ["Point"]

# Reqiore the feature class of the layer to have the Float 'value' and Date 'SampleDate'
# ???  

 

Here i want only to be able to select a feature layer for a feature class that have the attribute "value" and "SampleData"

abaldenweck@blm.gov_BLM_EGIS

I don't think there's a way to do it as an in-built filter, but you use tool validation to check.

Try something like this? (Not super-tested but it should work)

def updateMessages(self, params):
    Samples = params[0]
    if Samples.value:
        field = {f.name:f.type for f in arcpy.ListFields(Samples.value)}
    valueFieldType = fields.get("value", None)
    SampDateFieldType = fields.get("SampleDate", None)
    if not (valueFieldType and SampDateFieldType):
        Samples.setErrorMessage('Feature Class must have a field named "value"'
                                'and a field named "SampleDate')
    if valueFieldType != "Single":
        Samples.setErrorMessage('"value" field must be a Float field')
    if SampDateFieldType != "Date":
        Samples.setErrorMessage('"SampleDate" field must be a Date field')