I agree in that this still is not the same as auto-generating the relation. I agree @GJ_Roelofs with the pain points you raise in the very beginning of this thread. The fact that Coda now kind of “suggests” how to set up in the destination table the reciprocal lookup is helpful, but still limited functionality.
I posted probably a primitive suggestion for a column of type “row” that might solve this. I assume as Coda moves along the types of Columns will increase, seems inevitable evolution of added functionality. So perhaps it would be possible to do something with more “wide open” relationships within a new Column format.
Cheers!