Hi Everyone!

MongoDB and Mongoose have both been updated with breaking changes recently.

Checkout this thread to see how you can update your MongoDB and Mongoose versions while also updating your syntax to avoid the breaking changes.

In the next lecture (YelpCamp: Seeding the Database) you can just use the following code for your seeds.js  file instead of using the code from the video:

var mongoose = require("mongoose");
var Campground = require("./models/campground");
var Comment   = require("./models/comment");

var data = [
    {
        name: "Cloud's Rest", 
        image: "https://farm4.staticflickr.com/3795/10131087094_c1c0a1c859.jpg",
        description: "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum"
    },
    {
        name: "Desert Mesa", 
        image: "https://farm6.staticflickr.com/5487/11519019346_f66401b6c1.jpg",
        description: "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum"
    },
    {
        name: "Canyon Floor", 
        image: "https://farm1.staticflickr.com/189/493046463_841a18169e.jpg",
        description: "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum"
    }
]

function seedDB(){
   //Remove all campgrounds
   Campground.remove({}, function(err){
        if(err){
            console.log(err);
        }
        console.log("removed campgrounds!");
        Comment.remove({}, function(err) {
            if(err){
                console.log(err);
            }
            console.log("removed comments!");
             //add a few campgrounds
            data.forEach(function(seed){
                Campground.create(seed, function(err, campground){
                    if(err){
                        console.log(err)
                    } else {
                        console.log("added a campground");
                        //create a comment
                        Comment.create(
                            {
                                text: "This place is great, but I wish there was internet",
                                author: "Homer"
                            }, function(err, comment){
                                if(err){
                                    console.log(err);
                                } else {
                                    campground.comments.push(comment);
                                    campground.save();
                                    console.log("Created new comment");
                                }
                            });
                    }
                });
            });
        });
    }); 
    //add a few comments
}

module.exports = seedDB;

If you run into the Cannot read property 'name' of null  error, it's because now that we have the seeds function in app.js the campgrounds get deleted and recreated every time we start or restart the app.
This means that, although they look the same, each campground has a brand new id in the database.
If you want to avoid this error then you can either, comment out seedDB() in app.js or just be sure to go back to the campgrounds index page before going to any of the show pages.
-------
Thanks,
Ian