mongotransactions 1.2.5

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mongotransactions

wrapper around mongoDB transactions and other pymongo operations

basic commands

from mongotransactions import Database
database = Database('mongodb+srv://username:password@host')

# by default the class will use the first database the uri has access to you can change it with
database.set_database('db_name')

# grab a collection

my_collection = database.get_collection('my_collection')

# then you can do your normal operations
for doc in my_collection.find():
  print(doc)

first = my_collection.find_one()

# a list of collections is available 

print(database.list_collections()) # ['my_collection']

Transactions

package also contains a wrapper around mongo transactions and bulkwrite so that multiple saves/updates/removes across multiple collections to be batch wrote to the server, and it will all roll back if anyone operation fails.

in MongoDB 4.2 and earlier, you cannot create collections in transactions.

The class takes the database class example above

from mongotransactions import Database, Transaction
database = Database('mongodb+srv://username:password@host')

database.set_database('db_name')

transaction = Transaction(database)


# insert operations return a named tuple with id that will be used and the current transactions
insert = transaction.insert('my_collection', { 'name': 'test'})
transaction.insert('events', { 'details': 'new document added', 'doc_id': insert.id})


print(transaction.transactions)
"""
{'my_collection': [InsertOne({'name': 'test', '_id': ObjectId('5f85b1b908820781dc16fe9d')})], 
'events': [InsertOne({'details': ' new document added', 'doc_id': ObjectId('5f85b1b908820781dc16fe9d'), '_id': ObjectID('5f85b1b908820781dc16fe9e')})]}
"""

# then finally commit 

transaction.run()