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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_update_upsert_merge_entities.py
DESCRIPTION:
These samples demonstrate the following: updating, upserting, and merging entities.
USAGE:
python sample_update_upsert_merge_entities.py
Set the environment variables with your own values before running the sample:
1) AZURE_STORAGE_CONNECTION_STRING - the connection string to your storage account
"""
from datetime import datetime, timedelta
import os
class TableEntitySamples(object):
connection_string = os.getenv("AZURE_TABLES_CONNECTION_STRING")
def create_and_get_entities(self):
# Instantiate a table service client
from azure.data.tables import TableClient
table = TableClient.from_connection_string(self.connection_string, table_name="mytable3")
# Create the Table
table.create_table()
my_entity = {
'PartitionKey': 'color',
'RowKey': 'crayola',
'text': 'Marker',
'color': 'Purple',
'price': '5'
}
try:
# [START create_entity]
created_entity = table.create_entity(entity=my_entity)
print("Created entity: {}".format(created_entity))
# [END create_entity]
# [START get_entity]
# Get Entity by partition and row key
got_entity = table.get_entity(partition_key=my_entity['PartitionKey'],
row_key=my_entity['RowKey'])
print("Received entity: {}".format(got_entity))
# [END get_entity]
finally:
# Delete the table
table.delete_table()
def list_all_entities(self):
# Instantiate a table service client
from azure.data.tables import TableClient
table = TableClient.from_connection_string(self.connection_string, table_name="mytable4")
# Create the table
table.create_table()
entity = {'PartitionKey': 'color2', 'RowKey': 'sharpie', 'text': 'Marker', 'color': 'Purple', 'price': '5'}
entity1 = {'PartitionKey': 'color2', 'RowKey': 'crayola', 'text': 'Marker', 'color': 'Red', 'price': '3'}
try:
# Create entities
table.create_entity(entity=entity)
table.create_entity(entity=entity1)
# [START query_entities]
# Query the entities in the table
entities = list(table.list_entities())
for i, entity in enumerate(entities):
print("Entity #{}: {}".format(entity, i))
# [END query_entities]
finally:
# Delete the table
table.delete_table()
def update_entities(self):
# Instantiate a table service client
from azure.data.tables import TableClient
from azure.data.tables import UpdateMode
table = TableClient.from_connection_string(self.connection_string, table_name="mytable6")
# Create the table and Table Client
table.create_table()
entity = {'PartitionKey': 'color', 'RowKey': 'sharpie', 'text': 'Marker', 'color': 'Purple', 'price': '5'}
entity1 = {'PartitionKey': 'color2', 'RowKey': 'crayola', 'text': 'Marker', 'color': 'Red', 'price': '3'}
try:
# Create entities
table.create_entity(entity=entity)
created = table.get_entity(partition_key=entity["PartitionKey"], row_key=entity["RowKey"])
# [START upsert_entity]
# Try Replace and then Insert on Fail
insert_entity = table.upsert_entity(mode=UpdateMode.REPLACE, entity=entity1)
print("Inserted entity: {}".format(insert_entity))
# Try merge, and merge since already in table
created.text = "NewMarker"
merged_entity = table.upsert_entity(mode=UpdateMode.MERGE, entity=entity)
print("Merged entity: {}".format(merged_entity))
# [END upsert_entity]
# [START update_entity]
# Update the entity
created.text = "NewMarker"
table.update_entity(mode=UpdateMode.REPLACE, entity=created)
# Get the replaced entity
replaced = table.get_entity(
partition_key=created.PartitionKey, row_key=created.RowKey)
print("Replaced entity: {}".format(replaced))
# Merge the entity
replaced.color = "Blue"
table.update_entity(mode=UpdateMode.MERGE, entity=replaced)
# Get the merged entity
merged = table.get_entity(
partition_key=replaced.PartitionKey, row_key=replaced.RowKey)
print("Merged entity: {}".format(merged))
# [END update_entity]
finally:
# Delete the table
table.delete_table()
if __name__ == '__main__':
sample = TableEntitySamples()
sample.create_and_get_entities()
sample.list_all_entities()
sample.update_entities()
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