---
schema_version: "1"
id: 9cd04ebbc38dfdcddfc8e6fdf9ed51e316a734ad171c5f8fc12deee9a8391556
title: FieldMappingRow
collection: legacydeveloper
version: current
locale: en-us
portal_url: https://docs.salesforce.com/legacydeveloper/current/en-us/api_tooling/tooling_api_objects_fieldmappingrow.md
canonical_url: https://developer.salesforce.com/docs/atlas.en-us.api_tooling.meta/api_tooling/tooling_api_objects_fieldmappingrow.htm
source_site: developer.salesforce.com
content_type: documentation
content_hash: 625dd3a0b842855a4fb6690efeaa4d988caf4874ce767d3311c094ba1c79c3ff
description: Represents a field in a data service record that maps to a field in an object record in the org.
---
# FieldMappingRow

Represents a field in a data service record that maps to a field in an object record in the org.

This object is available in API version 38.0 and later.

## Supported SOAP Calls

create(), delete(), describeSObjects(), query(), retrieve(), update(), upsert()

## Supported REST HTTP Methods

GET

## Fields

| Field | Details |
| --- | --- |
| FieldMappingID | 
Type

reference

Properties

Create, Filter, Group, Sort

Description

A foreign key reference to the parent FieldMapping for this FieldMappingRow.



 |
| FieldName | 

Type

picklist

Properties

Create, Filter, Group, Nillable, Restricted picklist, Sort, Update

Description

The set of picklist values includes all the standard and custom object types in your org.



 |
| Operation | 

Type

picklist

Properties

Create (reserved for future use), Defaulted on create (reserved for future use), Filter, Group, Nillable (reserved for future use), Restricted picklist (reserved for future use), Sort, Update (reserved for future use)

Description

The comparison operation that the data service applies when it compares the value of this FieldMappingRow to the mapped field in the object specified in SObjectType. The following values are supported.

- Autofill fills empty fields and keeps values of fields that already contain data.
- Overwrite fills empty fields and updates fields that already contain data. History tracking is required for fields set to Overwrite.





 |
| SobjectType | 

Type

picklist

Properties

CreateFilter, Group, Nillable, Restricted picklist, Sort

Description

The standard or custom object in your org that contains the field mapped by this FieldMappingRow. The set of picklist values includes all the standard and custom object types in your org. However, if you specify an object that the data service doesn’t support, the API call returns an error.



 |