old_contents: #
  # Licensed to the Apache Software Foundation (ASF) under one
  # or more contributor license agreements.  See the NOTICE file
  # distributed with this work for additional information
  # regarding copyright ownership.  The ASF licenses this file
  # to you under the Apache License, Version 2.0 (the
  # "License"); you may not use this file except in compliance
  # with the License.  You may obtain a copy of the License at
  #
  #   http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing,
  # software distributed under the License is distributed on an
  # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  # KIND, either express or implied.  See the License for the
  # specific language governing permissions and limitations
  # under the License.
  from airflow.providers.mongo.hooks.mongo import MongoHook
  from airflow.sensors.base import BaseSensorOperator
  
  
  class MongoSensor(BaseSensorOperator):
      """
      Checks for the existence of a document which
      matches the given query in MongoDB. Example:
  
      >>> mongo_sensor = MongoSensor(collection="coll",
      ...                            query={"key": "value"},
      ...                            mongo_conn_id="mongo_default",
      ...                            task_id="mongo_sensor")
  
      :param collection: Target MongoDB collection.
      :type collection: str
      :param query: The query to find the target document.
      :type query: dict
      :param mongo_conn_id: The :ref:`Mongo connection id <howto/connection:mongo>` to use
          when connecting to MongoDB.
      :type mongo_conn_id: str
      """
  
      template_fields = ('collection', 'query')
  
      def __init__(
          self, *, collection: str, query: dict, mongo_conn_id: str = "mongo_default", mongo_db=None, **kwargs
      ) -> None:
          super().__init__(**kwargs)
          self.mongo_conn_id = mongo_conn_id
          self.collection = collection
          self.query = query
          self.mongo_db = mongo_db
  
      def poke(self, context: dict) -> bool:
          self.log.info(
              "Sensor check existence of the document that matches the following query: %s", self.query
          )
          hook = MongoHook(self.mongo_conn_id)
          return hook.find(self.collection, self.query, mongo_db=self.mongo_db, find_one=True) is not None
  
new_contents: #
  # Licensed to the Apache Software Foundation (ASF) under one
  # or more contributor license agreements.  See the NOTICE file
  # distributed with this work for additional information
  # regarding copyright ownership.  The ASF licenses this file
  # to you under the Apache License, Version 2.0 (the
  # "License"); you may not use this file except in compliance
  # with the License.  You may obtain a copy of the License at
  #
  #   http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing,
  # software distributed under the License is distributed on an
  # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  # KIND, either express or implied.  See the License for the
  # specific language governing permissions and limitations
  # under the License.
  from airflow.providers.mongo.hooks.mongo import MongoHook
  from airflow.sensors.base import BaseSensorOperator
  
  
  class MongoSensor(BaseSensorOperator):
      """
      Checks for the existence of a document which
      matches the given query in MongoDB. Example:
  
      >>> mongo_sensor = MongoSensor(collection="coll",
      ...                            query={"key": "value"},
      ...                            mongo_conn_id="mongo_default",
      ...                            mongo_db="admin",
      ...                            task_id="mongo_sensor")
  
      :param collection: Target MongoDB collection.
      :type collection: str
      :param query: The query to find the target document.
      :type query: dict
      :param mongo_conn_id: The :ref:`Mongo connection id <howto/connection:mongo>` to use
          when connecting to MongoDB.
      :type mongo_conn_id: str
      :param mongo_db: Target MongoDB name.
      :type mongo_db: str
      """
  
      template_fields = ('collection', 'query')
  
      def __init__(
          self, *, collection: str, query: dict, mongo_conn_id: str = "mongo_default", mongo_db=None, **kwargs
      ) -> None:
          super().__init__(**kwargs)
          self.mongo_conn_id = mongo_conn_id
          self.collection = collection
          self.query = query
          self.mongo_db = mongo_db
  
      def poke(self, context: dict) -> bool:
          self.log.info(
              "Sensor check existence of the document that matches the following query: %s", self.query
          )
          hook = MongoHook(self.mongo_conn_id)
          return hook.find(self.collection, self.query, mongo_db=self.mongo_db, find_one=True) is not None
  
subject: add mongo_db param to function doc string (#19280)