Mine was a different use case. I don’t think the query string acknowledges the context. Perhaps you could have a sister model based on the same object that only allows one row. Then you could have a before load action that sets a condition on the sister model to equal the row in context and requery that model. Then you would have a model with only one row which would be the row you want to pass into the query string. Since there is only one row in the model and it will be the first row, there should be no confusion.
