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 +1,32 @@
+require('dotenv').config()
+const pg = require('pg')
+const db = new pg.Client()
+const task = process.argv[2]
+
+const CREATE_TABLE_SQL = `CREATE TABLE IF NOT EXISTS tasks
+                          (id SERIAL, task TEXT NOT NULL, PRIMARY KEY ( id ))`
+const INSERT_TASK_SQL = `INSERT INTO tasks (task) VALUES ($1);`
+const GET_TASKS_SQL = `SELECT * FROM tasks;`
+
+db.connect((err) => {
+    if (err) throw err
+    db.query(CREATE_TABLE_SQL, (err) => {
+        if (err) throw err
+        if (task) {
+            db.query(INSERT_TASK_SQL, [task], (err) => {
+                if (err) throw err
+                listTasks()
+            })
+        } else {
+            listTasks()
+        }
+    })
+})
+
+function listTasks() {
+    db.query(GET_TASKS_SQL, (err, results) => {
+        if (err) throw err
+        console.log(results.rows);
+        db.end()
+    })
+}