How to create a JSON object from table rows containing key-value pairs?

Question

I am trying to form a jsonb object (not array) from the table (t1) below

id	key	value
1	hello	world
1	dns	192.2.8.0
1	people	1000

I have tried

SELECT 
 jsonb_agg(('{"' || key || '" : "' || value || '"}')::jsonb) as kv_pair 
FROM t1 GROUP BY id

This yields [{"hello":"world"}, {"dns":"192.2.8.0"}, {"people":1000}]

How do I flatten/ concatenate the array so the output is just a single object like so:

{"hello":"world" , "dns":"192.2.8.0" , "people":1000}

It is important that I have a single object for an Alembic migration.

Thanks in advance

Answer 1

turns out I was overcomplicating things and using the wrong function

SELECT id, jsonb_object_agg(key, value) as kv_pair
FROM t1 
GROUP BY id