JSONB sqlalchemy Aggregate Function

Question

With SQLAlchemy I want to reproduce the available aggregate function jsonb_object_agg from a subquery sq_objects:

from sqlalchemy import select,         


        

Answer 1

Not the most elegant implementation, but since I now the labels of the subquery columns; a raw text input solves the issue:

func.jsonb_object_agg(
    text("sq_objects.keys"),
    text("sq_objects.values")
).over(
    partition_by=sq_objects.c.object_id).label("attributes"),

Answer 2

The problem is that the attributes keys and values are methods of the immutable column collection sq_objects.c. Another solution to the problem is to use item access notation for getting the actual columns:

func.jsonb_object_agg(
    sq_objects.c["keys"],
    sq_objects.c["values"]
).over(
    partition_by=sq_objects.c.object_id
).label("attributes")