app.js

var bodyParser = require("body-parser"),
methodOverride = require("method-override"),
mongoose   = require("mongoose"),
express    = require("express"),
app        =express();
   const port = 3000;
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"));
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:"Test Blog",
    image:"https://i.ytimg.com/vi/3EIbWjkimAs/maxresdefault.jpg",
    body:"Hello this is"

});*/
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){
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){
    Blog.findByIdAndUpdate(req.params.id, req.body.blog, function(err,updatedBlog){
        if(err){
        res.redirect("/blogs");
    }else{
        res.redirect("/blogs/" + req.params.id);
    }
    });
});
//DELETE 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(port, () => console.log('Example app listening at http://localhost:${port}'))