RemovedIn20Warning when inserting a record using engine.connect()

Question

I am new to SQLAlchemy. I am trying to execute a simple insert statement, but I get a "removed In 2.0" warning.

from sqlalchemy import (MetaData, Table, Column, Integer, Numeric, String,
                        ForeignKey, create_engine)

metadata = MetaData()

cookies = Table('cookies', metadata,
                Column('cookie_id', Integer(), primary_key=True),
                Column('cookie_name', String(50), index=True),
                Column('cookie_recipe_url', String(255)),
                Column('cookie_sku', String(55)),
                Column('quantity', Integer()),
                Column('unit_cost', Numeric(12, 2))
                )

ins = cookies.insert().values(
    cookie_name="chocolate chip",
    cookie_recipe_url="http://some.aweso.me/cookie/recipe.html",
    cookie_sku="CC01",
    quantity="12",
    unit_cost="0.50"
)

engine = create_engine('postgresql+psycopg2://postgres:postgres@localhost:5432/cookies')
with engine.connect() as conn:
    result = conn.execute(ins)

Here is the warning:

RemovedIn20Warning: Deprecated API features detected! These feature(s) are not compatible with SQLAlchemy 2.0. To prevent incompatible upgrades prior to updating applications, ensure requirements files are pinned to "sqlalchemy<2.0". Set environment variable SQLALCHEMY_WARN_20=1 to show all deprecation warnings.  Set environment variable SQLALCHEMY_SILENCE_UBER_WARNING=1 to silence this message. (Background on SQLAlchemy 2.0 at: https://sqlalche.me/e/b8d9)
  result = conn.execute(ins)

I tried to find how to execute the statements in the docs, but it seems they are using the same connection object and execute method. What am I missing?

Asked By: Mohammed Elbagoury

||

Source

Answer 1

I think maybe all the docs haven’t been updated yet.

The problem is that your code is dependent on autocommit which is being removed. The link below the examples has some more details.

ADDED: You can also set future=True when using create_engine and then your connections will have the ability to commit and the warning won’t be raised. Note by using the new 2.0 functionality, future=True, that your inserts will not be committed unless you call conn.commit().

engine = create_engine(..., future=True)

with engine.connect() as conn:
    conn.execute(ins)
    conn.commit()

OR Try using one of these:

with engine.connect() as conn, conn.begin():
    conn.execute(ins)

with engine.connect() as conn:
    with conn.begin():
        conn.execute(ins)

with engine.begin() as conn:
    conn.execute(ins)

migration-core-connection-transaction

Answered By: Ian Wilson

RemovedIn20Warning when inserting a record using engine.connect()

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