Source code for airflow.contrib.hooks.mongo_hook

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from ssl import CERT_NONE

from airflow.hooks.base_hook import BaseHook
from pymongo import MongoClient, ReplaceOne


[docs]class MongoHook(BaseHook): """ PyMongo Wrapper to Interact With Mongo Database Mongo Connection Documentation https://docs.mongodb.com/manual/reference/connection-string/index.html You can specify connection string options in extra field of your connection https://docs.mongodb.com/manual/reference/connection-string/index.html#connection-string-options If you want use DNS seedlist, set `srv` to True. ex. {"srv": true, "replicaSet": "test", "ssl": true, "connectTimeoutMS": 30000} """
[docs] conn_type = 'mongo'
def __init__(self, conn_id='mongo_default', *args, **kwargs): super(MongoHook, self).__init__(source='mongo') self.mongo_conn_id = conn_id self.connection = self.get_connection(conn_id) self.extras = self.connection.extra_dejson.copy() self.client = None srv = self.extras.pop('srv', False) scheme = 'mongodb+srv' if srv else 'mongodb' self.uri = '{scheme}://{creds}{host}{port}/{database}'.format( scheme=scheme, creds='{}:{}@'.format( self.connection.login, self.connection.password ) if self.connection.login else '', host=self.connection.host, port='' if self.connection.port is None else ':{}'.format(self.connection.port), database=self.connection.schema )
[docs] def __enter__(self): return self
[docs] def __exit__(self, exc_type, exc_val, exc_tb): if self.client is not None: self.close_conn()
[docs] def get_conn(self): """ Fetches PyMongo Client """ if self.client is not None: return self.client # Mongo Connection Options dict that is unpacked when passed to MongoClient options = self.extras # If we are using SSL disable requiring certs from specific hostname if options.get('ssl', False): options.update({'ssl_cert_reqs': CERT_NONE}) self.client = MongoClient(self.uri, **options) return self.client
[docs] def close_conn(self): client = self.client if client is not None: client.close() self.client = None
[docs] def get_collection(self, mongo_collection, mongo_db=None): """ Fetches a mongo collection object for querying. Uses connection schema as DB unless specified. """ mongo_db = mongo_db if mongo_db is not None else self.connection.schema mongo_conn = self.get_conn() return mongo_conn.get_database(mongo_db).get_collection(mongo_collection)
[docs] def aggregate(self, mongo_collection, aggregate_query, mongo_db=None, **kwargs): """ Runs an aggregation pipeline and returns the results https://api.mongodb.com/python/current/api/pymongo/collection.html#pymongo.collection.Collection.aggregate https://api.mongodb.com/python/current/examples/aggregation.html """ collection = self.get_collection(mongo_collection, mongo_db=mongo_db) return collection.aggregate(aggregate_query, **kwargs)
[docs] def find(self, mongo_collection, query, find_one=False, mongo_db=None, **kwargs): """ Runs a mongo find query and returns the results https://api.mongodb.com/python/current/api/pymongo/collection.html#pymongo.collection.Collection.find """ collection = self.get_collection(mongo_collection, mongo_db=mongo_db) if find_one: return collection.find_one(query, **kwargs) else: return collection.find(query, **kwargs)
[docs] def insert_one(self, mongo_collection, doc, mongo_db=None, **kwargs): """ Inserts a single document into a mongo collection https://api.mongodb.com/python/current/api/pymongo/collection.html#pymongo.collection.Collection.insert_one """ collection = self.get_collection(mongo_collection, mongo_db=mongo_db) return collection.insert_one(doc, **kwargs)
[docs] def insert_many(self, mongo_collection, docs, mongo_db=None, **kwargs): """ Inserts many docs into a mongo collection. https://api.mongodb.com/python/current/api/pymongo/collection.html#pymongo.collection.Collection.insert_many """ collection = self.get_collection(mongo_collection, mongo_db=mongo_db) return collection.insert_many(docs, **kwargs)
[docs] def update_one(self, mongo_collection, filter_doc, update_doc, mongo_db=None, **kwargs): """ Updates a single document in a mongo collection. https://api.mongodb.com/python/current/api/pymongo/collection.html#pymongo.collection.Collection.update_one :param mongo_collection: The name of the collection to update. :type mongo_collection: str :param filter_doc: A query that matches the documents to update. :type filter_doc: dict :param update_doc: The modifications to apply. :type update_doc: dict :param mongo_db: The name of the database to use. Can be omitted; then the database from the connection string is used. :type mongo_db: str """ collection = self.get_collection(mongo_collection, mongo_db=mongo_db) return collection.update_one(filter_doc, update_doc, **kwargs)
[docs] def update_many(self, mongo_collection, filter_doc, update_doc, mongo_db=None, **kwargs): """ Updates one or more documents in a mongo collection. https://api.mongodb.com/python/current/api/pymongo/collection.html#pymongo.collection.Collection.update_many :param mongo_collection: The name of the collection to update. :type mongo_collection: str :param filter_doc: A query that matches the documents to update. :type filter_doc: dict :param update_doc: The modifications to apply. :type update_doc: dict :param mongo_db: The name of the database to use. Can be omitted; then the database from the connection string is used. :type mongo_db: str """ collection = self.get_collection(mongo_collection, mongo_db=mongo_db) return collection.update_many(filter_doc, update_doc, **kwargs)
[docs] def replace_one(self, mongo_collection, doc, filter_doc=None, mongo_db=None, **kwargs): """ Replaces a single document in a mongo collection. https://api.mongodb.com/python/current/api/pymongo/collection.html#pymongo.collection.Collection.replace_one .. note:: If no ``filter_doc`` is given, it is assumed that the replacement document contain the ``_id`` field which is then used as filters. :param mongo_collection: The name of the collection to update. :type mongo_collection: str :param doc: The new document. :type doc: dict :param filter_doc: A query that matches the documents to replace. Can be omitted; then the _id field from doc will be used. :type filter_doc: dict :param mongo_db: The name of the database to use. Can be omitted; then the database from the connection string is used. :type mongo_db: str """ collection = self.get_collection(mongo_collection, mongo_db=mongo_db) if not filter_doc: filter_doc = {'_id': doc['_id']} return collection.replace_one(filter_doc, doc, **kwargs)
[docs] def replace_many(self, mongo_collection, docs, filter_docs=None, mongo_db=None, upsert=False, collation=None, **kwargs): """ Replaces many documents in a mongo collection. Uses bulk_write with multiple ReplaceOne operations https://api.mongodb.com/python/current/api/pymongo/collection.html#pymongo.collection.Collection.bulk_write .. note:: If no ``filter_docs``are given, it is assumed that all replacement documents contain the ``_id`` field which are then used as filters. :param mongo_collection: The name of the collection to update. :type mongo_collection: str :param docs: The new documents. :type docs: list[dict] :param filter_docs: A list of queries that match the documents to replace. Can be omitted; then the _id fields from docs will be used. :type filter_docs: list[dict] :param mongo_db: The name of the database to use. Can be omitted; then the database from the connection string is used. :type mongo_db: str :param upsert: If ``True``, perform an insert if no documents match the filters for the replace operation. :type upsert: bool :param collation: An instance of :class:`~pymongo.collation.Collation`. This option is only supported on MongoDB 3.4 and above. :type collation: pymongo.collation.Collation """ collection = self.get_collection(mongo_collection, mongo_db=mongo_db) if not filter_docs: filter_docs = [{'_id': doc['_id']} for doc in docs] requests = [ ReplaceOne( filter_docs[i], docs[i], upsert=upsert, collation=collation) for i in range(len(docs)) ] return collection.bulk_write(requests, **kwargs)
[docs] def delete_one(self, mongo_collection, filter_doc, mongo_db=None, **kwargs): """ Deletes a single document in a mongo collection. https://api.mongodb.com/python/current/api/pymongo/collection.html#pymongo.collection.Collection.delete_one :param mongo_collection: The name of the collection to delete from. :type mongo_collection: str :param filter_doc: A query that matches the document to delete. :type filter_doc: dict :param mongo_db: The name of the database to use. Can be omitted; then the database from the connection string is used. :type mongo_db: str """ collection = self.get_collection(mongo_collection, mongo_db=mongo_db) return collection.delete_one(filter_doc, **kwargs)
[docs] def delete_many(self, mongo_collection, filter_doc, mongo_db=None, **kwargs): """ Deletes one or more documents in a mongo collection. https://api.mongodb.com/python/current/api/pymongo/collection.html#pymongo.collection.Collection.delete_many :param mongo_collection: The name of the collection to delete from. :type mongo_collection: str :param filter_doc: A query that matches the documents to delete. :type filter_doc: dict :param mongo_db: The name of the database to use. Can be omitted; then the database from the connection string is used. :type mongo_db: str """ collection = self.get_collection(mongo_collection, mongo_db=mongo_db) return collection.delete_many(filter_doc, **kwargs)

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