allowing users to map attributes

Hi @tnarladni,

I believe that use the publish parameter option. Link Publish Parameter

Once configurated your Publish Parameter in FME Workbench and publish it to FME Server.

On FME Server the user can to choose to map field to run your workspace.

Thanks,

Danilo

From your example I would say: if the attributes do not match but the writer is set to automatic, it is not a problem that some attributes might be missing?

• When a source data has attributes A, B, C, D: A, B, C will be mapped to the destination attributes and D will be just ignored.
• When a source data has attributes A, C: A, C will be mapped and B will be missing.

Hi @tnarladni,

If your user is able to edit a local CSV file at each run in order to match whichever attribute names vary between the source and destination schemas, you may be able to set up a SchemaMapper in your translation. Take a look at this article for some ideas on how to set this up. In its simplest form the CSV is two columns, one for the Source attribute name, and one for the Destination attribute name.

Here's an example:

The SchemaMapper reads this file at each run, so it would need to be edited and saved before running, and will likely need to be edited each time as long as the schema varies each time.

Hope this helps spark a solution!

Thanks,

If the number of destination attributes was not so large, I would create published parameters corresponding to each destination attribute, so that the user can specify source attribute names to be mapped to the destination attributes for each, like this.

Then, in the workspace, rename the source attribute names based on the parameter values immediately after reading from the source dataset. Maybe writing a Python script would be an easy way to perform renaming.

# PythonCaller Script Example
import fme
class AttributeMapper(object):
    def __init__(self):
        # Destination attribute names = published parameter names
        destAttributes = [
            'AccessRdId',
            'NewExist',
            'PermTemp',
            'PublicPriv',
            'RoadName',
        ]
        self.map = {}
        for dest in destAttributes:
            src = fme.macroValues[dest]
            if src and src != dest:
                self.map[src] = dest
        
    def input(self, feature):
        for src, dest in self.map.items():
            null, missing, type = feature.getAttributeNullMissingAndType(src)
            if null:
                feature.setAttributeNullWithType(dest, type)
            elif not missing:
                feature.setAttribute(dest, feature.getAttribute(src))
            feature.removeAttribute(src)
        self.pyoutput(feature)