Deno: MongoDB のデータを読む (Read)

Deno で MongoDB のデータを読みます。

mongo_read.ts

//
//	mongo_read.ts
//
//					Jan/06/2024
// ----------------------------------------------------------------
import { MongoClient } from "https://deno.land/x/mongo@v0.32.0/mod.ts";
import { config } from "https://deno.land/x/dotenv/mod.ts"

console.log ("*** 開始 ***")

const config_env:any = config()

const user:string = config_env.user
const password:string = config_env.password
const db_name:string = config_env.db
const collection_name:string = config_env.collection

const host:string = user + ':' + password + '@localhost'
const port:number = 27017

const url:string = 'mongodb://' + host + ':' + port

console.log("Connecting to " + host + ":" + port)

const client = new MongoClient()
await client.connect(url)

const db = client.database(db_name)
const cities = db.collection(collection_name)

const count = await cities.countDocuments({})
console.log(count)

const cursor = cities.find({ key: { $ne: null } })
for await (const item of cursor) {
	var str_out = item.key + "\t" + item.name
	str_out += "\t" + item.population
	str_out += "\t" + item.date_mod
	console.log(str_out)
}

console.log ("*** 終了 ***")

// ----------------------------------------------------------------

.env

user='scott'
password='tiger123'
db='city'
collection='saitama'

実行コマンド

deno run --allow-net --allow-write --allow-read --unstable mongo_read.ts