1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
# 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_async.py
DESCRIPTION:
These samples demonstrate the following: inserting entities into a table
and deleting entities from a table.
USAGE:
python sample_encode_dataclass_model_async.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
import asyncio
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 UpdateMode, EdmType
from azure.data.tables.aio import TableClient
@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 = "CustomEncoderDataclassModelAsync"
async 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
)
async with table_client:
await 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 = await table_client.create_entity(entity=asdict(entity))
print(f"Created entity: {result}")
result = await table_client.get_entity(entity.PartitionKey, str(entity.RowKey))
print(f"Get entity result: {result}")
await table_client.delete_entity(entity=asdict(entity))
print("Successfully deleted!")
await table_client.delete_table()
print("Cleaned up")
async 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,
)
async with table_client:
await 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,
)
await table_client.upsert_entity(mode=UpdateMode.REPLACE, entity=asdict(entity1))
inserted_entity = await table_client.get_entity(entity1.PartitionKey, str(entity1.RowKey))
print(f"Inserted entity: {inserted_entity}")
await table_client.upsert_entity(mode=UpdateMode.MERGE, entity=asdict(entity2))
merged_entity = await 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",
)
await table_client.update_entity(mode=UpdateMode.REPLACE, entity=asdict(entity3))
replaced_entity = await table_client.get_entity(entity3.PartitionKey, str(entity3.RowKey))
print(f"Replaced entity: {replaced_entity}")
await table_client.update_entity(mode=UpdateMode.REPLACE, entity=asdict(entity2))
merged_entity = await table_client.get_entity(entity2.PartitionKey, str(entity2.RowKey))
print(f"Merged entity: {merged_entity}")
await table_client.delete_entity(partition_key=entity1.PartitionKey, row_key=str(entity1.RowKey))
print("Successfully deleted!")
await table_client.delete_table()
print("Cleaned up")
async def main():
ide = InsertUpdateDeleteEntity()
await ide.create_delete_entity()
await ide.upsert_update_entities()
if __name__ == "__main__":
asyncio.run(main())
|
