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insert_data_sample.py
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# Copyright 2024 Google LLC All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import uuid
from sqlalchemy import create_engine
from sqlalchemy.orm import Session
from sample_helper import run_sample
from model import Singer, Album, Track
# Shows how to insert data using SQLAlchemy, including relationships that are
# defined both as foreign keys and as interleaved tables.
def insert_data():
engine = create_engine(
"spanner:///projects/sample-project/"
"instances/sample-instance/"
"databases/sample-database",
echo=True,
)
with Session(engine) as session:
singer = Singer(
id=str(uuid.uuid4()),
first_name="John",
last_name="Smith",
albums=[
Album(
id=str(uuid.uuid4()),
title="Rainforest",
tracks=[
# Track is INTERLEAVED IN PARENT Album, but can be treated
# as a normal relationship in SQLAlchemy.
Track(track_number=1, title="Green"),
Track(track_number=2, title="Blue"),
Track(track_number=3, title="Yellow"),
],
),
Album(
id=str(uuid.uuid4()),
title="Butterflies",
tracks=[
Track(track_number=1, title="Purple"),
Track(track_number=2, title="Cyan"),
Track(track_number=3, title="Mauve"),
],
),
],
)
session.add(singer)
session.commit()
# Use AUTOCOMMIT for sessions that only read. This is more
# efficient than using a read/write transaction to only read.
session.connection(execution_options={"isolation_level": "AUTOCOMMIT"})
print(
f"Inserted singer {singer.full_name} with {len(singer.albums)} "
f"albums successfully"
)
if __name__ == "__main__":
run_sample(insert_data)