How to implement Foreign Key?

[ShipraShalini]

I have two collections in same mongo db. I wish to create two PostgreSQL tables using those (using the contents from both collections in both tables) and I want _id of the first as foreign key in the other table.
Can it be done? Can you please share sample .YAML file for this?

[aligajani]

@ShipraShalini I have the same query, did you find a solution?

[stewart-hector-whoknows]

There appears to be no support for Foreign Keys.