title: Mongodb creating copy of object
body: <p>Each time I use node app.js to start the server a new copy of the same object is created in database . In my code below it creates the test blog as many number of times as the node app.js is used to start the server .How can I fix this ?   </p>
  
  <pre><code>var express    = require("express"),
      mongoose   = require("mongoose"),
      bodyParser = require("body-parser"),
      app        = express();
  
  mongoose.connect('mongodb://localhost:27017/blog_app', {useNewUrlParser: true, useUnifiedTopology: true});
  app.set("view engine", "ejs");
  app.use(express.static("public"));
  app.use(bodyParser.urlencoded({extended: true}));
  
  var blogSchema = new mongoose.Schema({
      title: String,
      image: String,
      body: String,
      date: {
          type: Date,
          default: Date.now
      }
  });
  
  var Blog = mongoose.model("Blog", blogSchema);
  
  Blog.create({
      title: "Test Blog",
      image: "https://images.unsplash.com/photo-1494256997604-768d1f608cac?ixlib=rb-1.2.1&amp;ixid=eyJhcHBfaWQiOjEyMDd9&amp;auto=format&amp;fit=crop&amp;w=2202&amp;q=80",
      body: "This is a test app."
  });
  
  
  // INDEX route
  app.get("/", function(req, res){
          res.redirect("/blogs");
  });
  app.get("/blogs", function(req, res){
          // res.render("index");
          Blog.find({}, function(err, blogs){
              if(err){
                  console.log("ERROR!");
              } else {
                  res.render("index", {blogs: blogs});
              }
          })
  });
  
  
  
  app.listen(3000, function(){
      console.log("SERVER HAS STARTED!");
  });
  </code></pre>
  
  <blockquote>
    <p>use blog_app
    switched to db blog_app
    db.blogs.find()
    { "_id" : ObjectId("5dc2a990cebaeb07d43653ac"), "title" : "Test Blog", "image" : "<a href="https://unsplash.com/photos/-GzyUGKhjBY" rel="nofollow noreferrer">https://unsplash.com/photos/-GzyUGKhjBY</a>", "body" : "This is a test
    app.", "date" : ISODate("2019-11-06T11:08:00.162Z"), "__v" : 0 }
    { "_id" : ObjectId("5dc2aad48d1865088eed3881"), "title" : "Test Blog", "image" : "<a href="https://unsplash.com/photos/-GzyUGKhjBY" rel="nofollow noreferrer">https://unsplash.com/photos/-GzyUGKhjBY</a>", "body" : "This is a test
    app.", "date" : ISODate("2019-11-06T11:13:24.344Z"), "__v" : 0 }
    { "_id" : ObjectId("5dc2ae3f1f12100a748fdbb6"), "title" : "Test Blog", "image" : "<a href="https://unsplash.com/photos/-GzyUGKhjBY" rel="nofollow noreferrer">https://unsplash.com/photos/-GzyUGKhjBY</a>", "body" : "This is a test
    app.", "date" : ISODate("2019-11-06T11:27:59.182Z"), "__v" : 0 }
    { "_id" : ObjectId("5dc2ced6dbd5e902487e3241"), "title" : "Test Blog", "image" : "<a href="https://unsplash.com/photos/-GzyUGKhjBY" rel="nofollow noreferrer">https://unsplash.com/photos/-GzyUGKhjBY</a>", "body" : "This is a test
    app.", "date" : ISODate("2019-11-06T13:47:02.818Z"), "__v" : 0 }
    { "_id" : ObjectId("5dc2cf09a3052102541f30a9"), "title" : "Test Blog", "image" : "<a href="https://images.unsplash.com/photo-1494256997604-768d1f608cac?ixlib=" rel="nofollow noreferrer">https://images.unsplash.com/photo-1494256997604-768d1f608cac?ixlib=</a>
    rb-1.2.1&amp;ixid=eyJhcHBfaWQiOjEyMDd9&amp;auto=format&amp;fit=crop&amp;w=2202&amp;q=80", "body" : "This is a test app.", "date" : ISODate("2019-11-06T13:47:53.972Z"), "
    __v" : 0 }</p>
  </blockquote>