postgresql JSON(B) dialect: update value of a specific key in a JSON object

[Massimiliano della Rovere]

Greetings,

how should I write the .values() section of a CORE update() statement to render the following

postgres syntax?

The data column is a JSON(B) and contains a dict object.

UPDATE settings
SET data = data || '{"key": "value"}'
WHERE key = 'my_param';

Thanks,

Massimiliano

[Mike Bayer]

from sqlalchemy import Column

from sqlalchemy import Integer

from sqlalchemy import update

from sqlalchemy.dialects import postgresql

from sqlalchemy.dialects.postgresql import JSONB

from sqlalchemy.ext.declarative import declarative_base

Base = declarative_base()

class A(Base):

    __tablename__ = 'a'

    id = Column(Integer, primary_key=True)

    data = Column(JSONB)

stmt = update(A).values({A.data: A.data + {"key": "value"}}).where(A.id == 5)

print(stmt.compile(dialect=postgresql.dialect()))

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