I too am having an issue when creating a new record for a collection that has a pointer to another collection.
Service request with collName pre-populated
Mapping with _Id coming from LSV that was set onClick of the desired account
I am able to create a record, but it just does not populate the pointer field with the id, no matter what I try. Even during testing I cannot get it to put a static id into the pointer field.
the code that is suggested in this post does not work but I did not expect it to. As you can see in my mapping it looks like the collName and the _id are two separate values, so adding that code to the mapping of the _id doesn't make sense.
I am invoking the service with a button click.
I have no acl as I want everyone to see everything.
Any suggestions?