Improper deserialization of JSON type when top of level of data is array #404
Description
When inserting list<dict> (ex: [{"a": "b"}, {"x": "y"}]) into a JSON type via SQLAlchemy, insert works fine but when reading the same record, it gets deserialized to an empty JsonObject ({})
Environment details
- Programming language: Python
- OS: MacOS / Linux
- Language runtime version: 3.11.4
- Package version:
- sqlalchemy-spanner==1.7.0
- google-cloud-spanner==3.47.0
- SQLAlchemy==2.0.30
Steps to reproduce
import sqlalchemy as sqla
from sqlalchemy.orm import Session, declarative_base
PROJECT_ID = "****"
INSTANCE_ID = "spanner-test"
DATABASE_ID = "sumit-poc"
DATABASE_URL = f"spanner+spanner:///projects/{PROJECT_ID}/instances/{INSTANCE_ID}/databases/{DATABASE_ID}"
engine = sqla.create_engine(DATABASE_URL)
metadata = sqla.MetaData()
ORMModelBase = declarative_base(metadata=metadata)
class SampleModel(ORMModelBase):
__tablename__ = "SampleModel"
id = sqla.Column("id", sqla.types.Integer, primary_key=True)
data = sqla.Column("data", sqla.types.JSON, nullable=False)
if __name__ == "__main__":
session = Session(engine)
d = {"a": "b"}
r = SampleModel(id=101, data=d)
session.add(r)
r = SampleModel(id=102, data=[d])
session.add(r)
session.commit()
r1 = session.query(SampleModel).filter(SampleModel.id == 101).first()
print("r1.data", r1.data)
r2 = session.query(SampleModel).filter(SampleModel.id == 102).first()
print("r2.data", r2.data)
session.commit()
Expected Output:
r1.data {'a': 'b'}
r2.data [{'a': 'b'}]
Got Output:
r1.data {'a': 'b'}
r2.data {}