From: | Hans Ginzel <hans(at)matfyz(dot)cz> |
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To: | psycopg(at)lists(dot)postgresql(dot)org |
Subject: | register_adapter Json with custom JSONEncoder |
Date: | 2020-07-13 15:49:07 |
Message-ID: | 20200713154907.GH81733@artax.karlin.mff.cuni.cz |
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Lists: | psycopg |
Hello,
how can I register an adapter with custom JSONEncoder, please.
On Stack Overflow, https://stackoverflow.com/a/55939024/2556118
I have found to use Json class
psycopg2.extensions.register_adapter(dict, psycopg2.extras.Json).
But I need to use custom JSONEncoder because of bson.ObectId type
# https://stackoverflow.com/a/16586277/2556118
import json
from bson import ObjectId
class JSONEncoder(json.JSONEncoder):
def default(self, o):
if isinstance(o, ObjectId):
return str(o)
return supper().JSONEncoder.default(self, o)
There is a parameter dumps in Json.__init__(self, adapted, dumps=None),
but how to set it when used with register_adapter(),
https://www.psycopg.org/docs/extensions.html#psycopg2.extensions.register_adapter?
Should I write myself the whole Json class?
Thank you in advance,
Hans
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