Better version of Seeds.js for Colt Steele's Web Developer Bootcamp - Better error handling, also seeds comments.

seeds.js

var mongoose = require("mongoose"),
    Campground = require("./models/campground"),
    Comment = require("./models/comment");
    
var data = [
    {
        name: "Cloud's Rest", 
        image: "https://farm4.staticflickr.com/3795/10131087094_c1c0a1c859.jpg",
        description: "blah blah blah"
    },
    {
        name: "Desert Mesa", 
        image: "https://www.backpackerguide.nz/wp-content/uploads/2016/01/free-campsites-in-the-north-island.jpg",
        description: "blah blah blah"
    },
    {
        name: "Canyon Floor", 
        image: "https://farm1.staticflickr.com/189/493046463_841a18169e.jpg",
        description: "blah blah blah"
    }
];

function seedDB(){
    Campground.deleteMany({}, function(err){
        if(err){
            console.log(err);
        } else {
            console.log('removed campgrounds');
            Comment.deleteMany({}, function(err){
                if(err){
                    console.log(err);
                } else {
                    console.log('removed comments');
                    data.forEach(function(seed) {
                        Campground.create(seed, function(err, campground){
                            if(err) {
                                console.log(err);
                            } else {
                                console.log('added campground');
                                Comment.create({
                                    text: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean luctus pellentesque lectus, in accumsan sapien tempor non. Nulla faucibus cursus convallis. Proin interdum augue bibendum varius lacinia.',
                                    author: 'Homer'
                                }, function(err, comment){
                                    if(err) {
                                        console.log(err);
                                    } else {
                                        campground.comments.push(comment);
                                        campground.save(function(err){
                                            if(err){
                                                console.log(err);
                                            } else {
                                                console.log('created new comment');
                                            }
                                        });
                                    }
                                });
                            }
                        });
                    });
                }
            });
        } 
    });
}

module.exports = seedDB;