SqlAlchemy: getting the id of the last record inserted

You might be able to use the RETURNING clause of the INSERT statement like this:

result = conn.execute("INSERT INTO user (name, country_id) VALUES ('Homer', 123)
                       RETURNING *")

If you only want the resulting id:

result = conn.execute("INSERT INTO user (name, country_id) VALUES ('Homer', 123)
                        RETURNING id")
[new_id] = result.fetchone()

User lastrowid

result = conn.execute("INSERT INTO user (name, country_id) VALUES ('Homer', 123)")
result.lastrowid

Current SQLAlchemy documentation suggests

result.inserted_primary_key should work!

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