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rows = [{"id": 1, "json_value": [{"key": "value"}, {"key2": "value2"}]}, {"id": 2, "json_column": None}] 
insert_query = table.insert().values(rows)
connection.execute(insert_query)

Doing this will have "null" (String) entered to the row where id=2. Rather than the NULL type.

Is there any way to properly do multiple row insert where value of some JSON columns is NULL?

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    Sounds like SQLAlchemy's doing something wrong there. None should correspond to json null not "null" and thus to SQL NULL. Commented Aug 7, 2014 at 7:16
  • It also seems so to me. Just trying to find out if there is any other solution than adding an issue to the SQLAlchemy BitBucket. Commented Aug 7, 2014 at 8:12

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The issue was a bug and has been fixed by the SQLAlchemy project maintainer.

Details here: https://groups.google.com/forum/#!topic/sqlalchemy/Bu4lJ18Gsa8

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