app.js

// require
var express=require("express"),
	app=express(),
	mongoose=require("mongoose"),
	bodyParser=require("body-parser"),
	methodOverride=require("method-override"),
	expressSanitizer=require("express-sanitizer");

//App Config.
mongoose.connect("mongodb://localhost/blog_app", { useNewUrlParser: true });
mongoose.set('useFindAndModify', false);
app.use(bodyParser.urlencoded({extended: true}));
app.use(express.static("public"));
app.set("view engine","ejs");
app.use(expressSanitizer());
app.use(methodOverride("_method"));

//Mongoose/Model config.
var blogSchema = new mongoose.Schema({
	title: String,
	image: String,
	description: String,
	body: String,+
	created: {type: Date, default: Date.now}
});
var Blog=mongoose.model("Blog",blogSchema);

//routes
//start route
app.get("/",function(req,res){
	res.redirect("/blogs");
})

//Index.ejs
app.get("/blogs",function(req,res){
	Blog.find({},function(err,allBlogs){
		if(err){
			console.log("Error!");
		} else {
			res.render("index",{blogs: allBlogs});
		}
	});
});

//New.ejs
app.get("/blogs/new",function(req,res){
	res.render("new");
});

//Create.ejs
app.post("/blogs",function(req,res){
	req.body.blog.body=req.sanitize(req.body.blog.body);
	
	Blog.create(req.body.blog,
		function(err,newBlog){
			if(err){
				res.redirect("/blogs/new");
			} else{
				res.redirect("/blogs");
			}	
		});
});

//Show.ejs
app.get("/blogs/:id",function(req,res){
	Blog.findById(req.params.id,
		function(err,foundBlog){
			if(err){
				res.redirect("/blogs");
			} else{
				res.render("show",{blog: foundBlog});
			} 
		});
});

//Edit.ejs
app.get("/blogs/:id/edit",function(req,res){
	Blog.findById(req.params.id,
		function(err,foundBlog){
			if(err){
				res.redirect("/blogs");
			} else{
				res.render("edit",{blog: foundBlog});
			}
		});
});

//Update.ejs
app.put("/blogs/:id",function(req,res){
	req.body.blog.body=req.sanitize(req.body.blog.body);

	Blog.findOneAndUpdate(req.params.id,
		req.body.blog,
		function(err,updatedBlog){
			if(err){
				res.redirect("/blogs");
			} else{
				res.redirect("/blogs/" + req.params.id);
			}
		});
});

//Destroy.ejs
app.delete("/blogs/:id",function(req,res){
	Blog.findByIdAndRemove(req.params.id,
		function(err){
			if(err){
				res.redirect("/blogs");
			} else {
				res.redirect("/blogs");
			}
		});
});

app.listen(3000,function(){
	console.log("App running!");
});