app.js

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

var app = express();
mongoose.connect("mongodb://localhost/restful_blog_app");
app.set("view engine", "ejs");
app.use(express.static("public"));
app.use(bodyParser.urlencoded({extended: true}));
app.use(methodOverride("_method"));
app.use(expressSanitizer());

var blogSchema = new mongoose.Schema({
    title: String,
    image: String,
    body: String,
    created: {type: Date, default: Date.now}
});

var Blog = mongoose.model("Blog",blogSchema);

// Blog.create({
//     title: "hello",
//     image: "http://i.dailymail.co.uk/i/pix/2017/04/11/06/3F23D80300000578-4399486-Palace_of_Westminster_view_from_the_Westminster_Bridge_One_of_th-a-12_1491890238800.jpg",
//     body:"this is view from London"
// })

app.get("/",function(req,res){
    res.redirect("/blogs");
});
//INDEX ROUTE
app.get("/blogs",function(req,res){
    Blog.find({},function(err, blogs){
        if(err){
            console.log(err)
        }else{
           res.render("index", {blogs:blogs}); 
        }
    })
});

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

//CREATE ROUTE
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.render("new");
        }else{
            res.redirect("/blogs");
        }
    });
});

//SHOW ROUTE
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 ROUTE
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 ROUTE
app.put("/blogs/:id", function(req,res){
    req.body.blog.body = req.sanitize(req.body.blog.body);
    Blog.findByIdAndUpdate(req.params.id, req.body.blog, function(err,updateBlog){
       if(err){
            res.redirect("/blogs");
        }else{
            res.redirect("/blogs/" + req.params.id);
        } 
    });
});

//DESTROY ROUTE
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(process.env.PORT, process.env.IP, function(){
    console.log("Server Conected!!!");
});