refer to: https://www.udemy.com/course/the-web-developer-bootcamp

image source: https://source.unsplash.com/

models/campground.js

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const CampgroundSchema = new Schema({
    title: String,
    image: String,
    Price: Number,
    description: String,
    location: String
});

module.exports = mongoose.model('Campground', CampgroundSchema);

seeds/index.js

const mongoose = require('mongoose');
const cities = require('./cities');
const { places, descriptors } = require('./seedHelpers');
const Campground = require('../models/campground'); // ".." to get outside the seeds folder

mongoose.connect('mongodb://localhost:27017/yelp-camp', {
    useNewUrlParser: true,
    useCreateIndex: true,
    useUnifiedTopology: true
});

const db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', function () {
    console.log("Database connected");
});


// array[Math.floor(Math.random() * array.length)], 产生0～数组长度-1的随机数
const sample = array => array[Math.floor(Math.random() * array.length)];

const seedDB = async () => {
    await Campground.deleteMany({});//删除之前的记录
    for (let i = 0; i < 50; i++) {
        const random1000 = Math.floor(Math.random() * 1000);//包含1000个城市, 0-999的随机数
        const price = Math.floor(Math.random() * 20) + 10;
        const camp = new Campground({
            location: `${cities[random1000].city}, ${cities[random1000].state}`,
            title: `${sample(descriptors)} ${sample(places)}`,
            image: 'https://source.unsplash.com/collection/483252/400x300',
            description: 'so beautiful',
            price
        })
        await camp.save();
    }
}


//一定要记得运行这个！
//运行之后断开mongoose连接
seedDB().then(() => {
    mongoose.connection.close();
})

views.show.ejs

<% layout('layouts/boilerplate') %>

    <h1>
        <%=campground.title%>
    </h1>
    <h2>
        <%=campground.location%>
    </h2>
    <img src="<%= campground.image%>" alt="">
    <p>
        <%= campground.description%>
    </p>
    <p>
        <a href="/campgrounds/<%=campground._id%>/edit">Edit</a>

    </p>
    <p>
    <form action="/campgrounds/<%=campground._id%>?_method=DELETE" method="POST">
        <button>delete</button>
    </form>
    </p>
    <footer>
        <a href="/campgrounds">All</a>
    </footer>
    <!-- a link to return to the all campgrounds page -->