Deleting+Data+in+MFlix.ipynb

{
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  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
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   "outputs": [],
   "source": [
    "import pymongo\n",
    "from bson.objectid import ObjectId"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
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   "outputs": [],
   "source": [
    "# Replace XXXX with your connection URI from the Atlas UI\n",
    "course_cluster_uri = XXXX"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "course_client = pymongo.MongoClient(course_cluster_uri)\n",
    "comments = course_client['mflix']['comments']"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "filter = {\"text\": \"What a great movie.\"}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "list(comments.find(filter))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "comments.delete_one(filter)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "list(comments.find(filter))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "titanic_id = ObjectId(\"573a139af29313caabcf0d74\")\n",
    "titanic_filter = {\"movie_id\": titanic_id}\n",
    "comments.delete_many(titanic_filter)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "movies = course_client['mflix']['movies']\n",
    "update_doc = {\n",
    "    \"$set\": {\n",
    "        \"comments\": [],\n",
    "        \"num_mflix_comments\": 0\n",
    "    }\n",
    "}\n",
    "movies.update_one(titanic_filter, update_doc)"
   ]
  }
 ],
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