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# coding: utf-8
# -------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See License.txt in the project root for
# license information.
# --------------------------------------------------------------------------
"""
FILE: sample_encode_dataclass_model.py
DESCRIPTION:
These samples demonstrate the following: inserting entities into a table
and deleting entities from a table.
USAGE:
python sample_encode_dataclass_model.py
Set the environment variables with your own values before running the sample:
1) TABLES_COSMOS_ENDPOINT_SUFFIX - the Table cosmos DB service account URL suffix
2) TABLES_COSMOS_ACCOUNT_NAME - the name of the cosmos DB account
3) TABLES_PRIMARY_COSMOS_ACCOUNT_KEY - the cosmos DB account access key
"""
import os
from datetime import datetime, timezone
from uuid import uuid4, UUID
from enum import Enum
from dotenv import find_dotenv, load_dotenv
from dataclasses import dataclass, asdict
from typing import Optional
from azure.data.tables import TableClient, UpdateMode, EdmType
@dataclass
class Car:
PartitionKey: str
RowKey: UUID
price: Optional[float] = None
last_updated: Optional[datetime] = None
product_id: Optional[UUID] = None
inventory_count: Optional[int] = None
barcode: Optional[bytes] = None
color: Optional[str] = None
maker: Optional[str] = None
model: Optional[str] = None
production_date: Optional[datetime] = None
big_number: Optional[int] = None
is_second_hand: Optional[bool] = None
class Color(str, Enum):
WHITE = "white"
GRAY = "gray"
BLACK = "black"
def encode_int(value):
return EdmType.STRING, str(value)
def encode_uuid(value):
return None, str(value)
encoder_map = {
int: encode_int,
UUID: encode_uuid,
}
def decode_string(value):
try:
return int(value)
except ValueError:
try:
return Color(value)
except ValueError:
try:
return UUID(value)
except ValueError:
return value
decoder_map = {
EdmType.STRING: decode_string,
}
class InsertUpdateDeleteEntity(object):
def __init__(self):
load_dotenv(find_dotenv())
self.access_key = os.environ["TABLES_PRIMARY_COSMOS_ACCOUNT_KEY"]
self.endpoint_suffix = os.environ["TABLES_COSMOS_ENDPOINT_SUFFIX"]
self.account_name = os.environ["TABLES_COSMOS_ACCOUNT_NAME"]
self.endpoint = f"{self.account_name}.table.{self.endpoint_suffix}"
self.connection_string = f"DefaultEndpointsProtocol=https;AccountName={self.account_name};AccountKey={self.access_key};EndpointSuffix={self.endpoint_suffix}"
self.table_name = "CustomEncoderDataclassModel"
def create_delete_entity(self):
table_client = TableClient.from_connection_string(
self.connection_string, self.table_name, encoder_map=encoder_map, decoder_map=decoder_map
)
with table_client:
table_client.create_table()
entity = Car(
PartitionKey="PK",
RowKey=uuid4(),
price=4.99,
last_updated=datetime.today(),
product_id=uuid4(),
inventory_count=42,
barcode=b"135aefg8oj0ld58", # cspell:disable-line
color=Color.WHITE,
model="model",
production_date=datetime(year=2014, month=4, day=1, hour=9, minute=30, second=45, tzinfo=timezone.utc),
big_number=2**63, # an integer exceeds max int64
is_second_hand=True,
)
result = table_client.create_entity(entity=asdict(entity))
print(f"Created entity: {result}")
result = table_client.get_entity(entity.PartitionKey, str(entity.RowKey))
print(f"Get entity result: {result}")
table_client.delete_entity(entity=asdict(entity))
print("Successfully deleted!")
table_client.delete_table()
print("Cleaned up")
def upsert_update_entities(self):
table_client = TableClient.from_connection_string(
self.connection_string,
table_name=f"{self.table_name}UpsertUpdate",
encoder_map=encoder_map,
decoder_map=decoder_map,
)
with table_client:
table_client.create_table()
entity1 = Car(
PartitionKey="PK",
RowKey=uuid4(),
price=4.99,
last_updated=datetime.today(),
product_id=uuid4(),
inventory_count=42,
barcode=b"135aefg8oj0ld58", # cspell:disable-line
)
entity2 = Car(
PartitionKey=entity1.PartitionKey,
RowKey=entity1.RowKey,
color="red",
maker="maker2",
model="model2",
production_date=datetime(year=2014, month=4, day=1, hour=9, minute=30, second=45, tzinfo=timezone.utc),
big_number=2**63, # an integer exceeds max int64
is_second_hand=True,
)
table_client.upsert_entity(mode=UpdateMode.REPLACE, entity=asdict(entity1))
inserted_entity = table_client.get_entity(entity1.PartitionKey, str(entity1.RowKey))
print(f"Inserted entity: {inserted_entity}")
table_client.upsert_entity(mode=UpdateMode.MERGE, entity=asdict(entity2))
merged_entity = table_client.get_entity(entity2.PartitionKey, str(entity2.RowKey))
print(f"Merged entity: {merged_entity}")
entity3 = Car(
PartitionKey=entity1.PartitionKey,
RowKey=entity2.RowKey,
color="white",
)
table_client.update_entity(mode=UpdateMode.REPLACE, entity=asdict(entity3))
replaced_entity = table_client.get_entity(entity3.PartitionKey, str(entity3.RowKey))
print(f"Replaced entity: {replaced_entity}")
table_client.update_entity(mode=UpdateMode.REPLACE, entity=asdict(entity2))
merged_entity = table_client.get_entity(entity2.PartitionKey, str(entity2.RowKey))
print(f"Merged entity: {merged_entity}")
table_client.delete_entity(partition_key=entity1.PartitionKey, row_key=str(entity1.RowKey))
print("Successfully deleted!")
table_client.delete_table()
print("Cleaned up")
if __name__ == "__main__":
ide = InsertUpdateDeleteEntity()
ide.create_delete_entity()
ide.upsert_update_entities()
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