Field Mapping - don't copy values

[udek801]

Hi

I've a question about FieldMapping from a source work item to a target work item. I've got a source work item with a lot of custom fields, but I don't need these custom fields in the target work item. How can I handle this? I thought I could use FieldSkipMap, but this just restores the target fields original value and in this case I don't have (or want) a target field. I just want to throw away the source valeu and not migrate it at all.

Is this possible?

Thanks!

[MrHinsh]

You just ignore them. Any field that is not in the target will be automatically skipped.

[udek801]

HI,

Thanks for this.
So when I try a migration, I end up with the error, as below.

[10:46:56 ERR] [16.3.0] Some work item types or their fields are not present in the target system (see previous logs). Either add these fields into target work items, or map source fields to other target fields in options (SourceFieldMappings).

How do I know exactly which work item type or field is causing this error? Because earlier in the log I have lots of warnings, pretty much one warning for every source field that is not in the target , as below.
[10:46:56 WRN] [16.3.0] Missing field 'Microsoft.VSTS.Common.ResolvedReason' in 'Product Backlog Item'.

Do I need to add each one of the fields that throws a warning message to the dictionary of "FixedTargetFields" in the WorkItemTypeValidatorTool?

And what about examples as below, where there are different allowed values? This is only an INF message though.

[10:46:56 INF] [16.3.0] Source field 'System.Reason' and target field 'System.Reason' have different allowed values.

Thanks.

[udek801]

To answer my own question, the way I got the validator tool to ignore validation of the source fields that I do not want in the target work item was to supply SourceFieldMappings to empty strings e.g.

"TfsWorkItemTypeValidatorTool" : {
		"SourceFieldMappings": {
			"Product Backlog Item": {
				"Microsoft.VSTS.Common.StackRank": "", 
				"Microsoft.VSTS.Common.ResolvedReason": ""
				}
			}
	}

[satano]

@udek801 You found it well. But to let you know, this will change soon after merging #3010. Than you will use ExcludeSourceFields property instead of SourceFieldMappings (this will not exist anymore). So your future configuration will be:

"TfsWorkItemTypeValidatorTool": {
    "ExcludeSourceFields": {
      "Product Backlog Item": [
        "Microsoft.VSTS.Common.StackRank",
        "Microsoft.VSTS.Common.ResolvedReason"
      ]
    }
}