Chapter 7: initial samples

2020-05-16 14:33:26 +01:00
parent bcf782f7dc
commit adb2130b38
140 changed files with 1777 additions and 1960 deletions
@@ -0,0 +1,149 @@
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+    "util-deprecate": {
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+}
@@ -0,0 +1,15 @@
+{
+  "name": "mongodb-app",
+  "version": "1.0.0",
+  "description": "",
+  "main": "tasks.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "mongodb": "^3.5.7"
+  }
+}
@@ -0,0 +1,42 @@
+const {
+    MongoClient
+} = require('mongodb')
+const task = process.argv[2]
+
+const URI = 'mongodb://localhost:27017/'
+
+MongoClient.connect(URI, {
+    useUnifiedTopology: true
+}, connected)
+
+function connected(err, client) {
+    if (err) throw err
+    const tasks = client.db('tasklist').collection('tasks')
+
+    if (task) {
+        addTask(client, tasks)
+    } else {
+        listTasks(client, tasks)
+    }
+}
+
+function addTask(client, tasks) {
+    tasks.insertOne({
+        task: task
+    }, (err) => {
+        if (err) throw err
+        console.log("New Task: ", task);
+        listTasks(client, tasks)
+    })
+}
+
+function listTasks(client, tasks) {
+    tasks.find().each((err, doc) => {
+        if (err) throw err
+        if (!doc) {
+            client.close()
+            return
+        }
+        console.log(doc)
+    })
+}