langchain/docs/extras/integrations/document_loaders/mongodb.ipynb

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   "source": [
    "# MongoDB"
   ]
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   "metadata": {},
   "source": [
    "[MongoDB](https://www.mongodb.com/) is a NoSQL , document-oriented database that supports JSON-like documents with a dynamic schema."
   ]
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   "source": [
    "## Overview"
   ]
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    "The MongoDB Document Loader returns a list of Langchain Documents from a MongoDB database.\n",
    "\n",
    "The Loader requires the following parameters:\n",
    "\n",
    "*   MongoDB connection string\n",
    "*   MongoDB database name\n",
    "*   MongoDB collection name\n",
    "*   (Optional) Content Filter dictionary\n",
    "\n",
    "The output takes the following format:\n",
    "\n",
    "- pageContent= Mongo Document\n",
    "- metadata={'database': '[database_name]', 'collection': '[collection_name]'}"
   ]
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   "source": [
    "## Load the Document Loader"
   ]
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   "cell_type": "code",
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   "source": [
    "# add this import for running in jupyter notebook\n",
    "import nest_asyncio\n",
    "nest_asyncio.apply()"
   ]
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  {
   "cell_type": "code",
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   "metadata": {},
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   "source": [
    "from langchain.document_loaders.mongodb import MongodbLoader"
   ]
  },
  {
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   "execution_count": 25,
   "metadata": {},
   "outputs": [],
   "source": [
    "loader = MongodbLoader(connection_string=\"mongodb://localhost:27017/\",\n",
    "                       db_name=\"sample_restaurants\", \n",
    "                       collection_name=\"restaurants\",\n",
    "                       filter_criteria={\"borough\": \"Bronx\", \"cuisine\": \"Bakery\" },\n",
    "                       ) "
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   "source": [
    "docs = loader.load()\n",
    "\n",
    "len(docs)"
   ]
  },
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   "cell_type": "code",
   "execution_count": 27,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Document(page_content=\"{'_id': ObjectId('5eb3d668b31de5d588f4292a'), 'address': {'building': '2780', 'coord': [-73.98241999999999, 40.579505], 'street': 'Stillwell Avenue', 'zipcode': '11224'}, 'borough': 'Brooklyn', 'cuisine': 'American', 'grades': [{'date': datetime.datetime(2014, 6, 10, 0, 0), 'grade': 'A', 'score': 5}, {'date': datetime.datetime(2013, 6, 5, 0, 0), 'grade': 'A', 'score': 7}, {'date': datetime.datetime(2012, 4, 13, 0, 0), 'grade': 'A', 'score': 12}, {'date': datetime.datetime(2011, 10, 12, 0, 0), 'grade': 'A', 'score': 12}], 'name': 'Riviera Caterer', 'restaurant_id': '40356018'}\", metadata={'database': 'sample_restaurants', 'collection': 'restaurants'})"
      ]
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     "metadata": {},
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   "source": [
    "docs[0]"
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