Postgres JSON Query on Unknown Keys - json

Question

I have a jsonb column where the structure always remains the same, but the keys within the json may change. For example,
{
"key-12345":
{
"values-12345": [
{"type": 5200,
"source": "somesource",
"messageid": 707643203507,
"timestamp": "2018-07-26T21:25:42.612Z",
"destination": "somedestination",
"previouslyRouted": false
},
{"type": 5200,
"source": "anothersource",
"messageid": 707643203507,
"timestamp": "2018-07-26T21:26:01.542Z",
"destination": "anotherdestination",
"previouslyRouted": false
}
]
},
"key-6789":
{
"values-34512": [
{"type": 5200,
"source": "yetantohersomesource",
"messageid": 707643203507,
"timestamp": "2018-07-26T21:25:42.612Z",
"destination": "yetanothersomedestination",
"previouslyRouted": false
},
{"type": 5200,
"source": "anothersource",
"messageid": 707643203507,
"timestamp": "2018-07-26T21:26:01.542Z",
"destination": "anotherdestination",
"previouslyRouted": false
}
]
}
}
I know that the structure of that document will be the same, but the keys could be anything. I can pull the keys themselves out with
select jsonb_object_keys(column) from table;
easily enough but I don't know how to pull the object assigned to that key and deal with it. How do I select from a jsonb object based on the value of a key, rather than the values.
select object from document where json_key = 'key-12345';

Answer 1

This is how it's done:
SELECT object->>'key-12345' FROM document;
and with a where clause:
SELECT * FROM document WHERE object->>'key-12345' IS NOT NULL;