More of chapter 9's source

ch09-databases/listing9_3/create-tables.js

@@ -0,0 +1,16 @@
+const pg = require('pg');
+const db = new pg.Client({ database: 'articles' });
+
+db.connect((err, client) => {
+  db.query(`
+    CREATE TABLE IF NOT EXISTS snippets (
+      id SERIAL,
+      PRIMARY KEY(id),
+      body text
+    );
+  `  , (err, result) => {
+    if (err) throw err;
+    console.log('Created table "snippets"');
+    db.end();
+  });
+});

ch09-databases/listing9_3/index.js

@@ -25,6 +25,7 @@ db.connect((err, client) => {
       if (err) throw err;
       const id = result.rows[0].id;
       console.log('Inserted row with id %s', id);
+      db.end();
     });
   });
 });

ch09-databases/listing9_4/create-tables.js

@@ -0,0 +1,16 @@
+const pg = require('pg');
+const db = new pg.Client({ database: 'articles' });
+
+db.connect((err, client) => {
+  db.query(`
+    CREATE TABLE IF NOT EXISTS snippets (
+      id SERIAL,
+      PRIMARY KEY(id),
+      body text
+    );
+  `  , (err, result) => {
+    if (err) throw err;
+    console.log('Created table "snippets"');
+    db.end();
+  });
+});

ch09-databases/listing9_4/index.js

@@ -0,0 +1,31 @@
+const pg = require('pg');
+const db = new pg.Client({ database: 'articles' });
+
+db.connect((err, client) => {
+  if (err) throw err;
+  console.log('Connected to database', db.database);
+
+  const body = 'hello world';
+  db.query(`
+    INSERT INTO snippets (body) VALUES (
+      '${body}'
+    )
+    RETURNING id
+  `, (err, result) => {
+    if (err) throw err;
+    const id = result.rows[0].id;
+    const updatedBody = 'greetings, world';
+
+    console.log('Inserted row with id %s', id);
+
+    db.query(`
+      UPDATE snippets SET (body) = (
+      '${body}'
+      ) WHERE id=${id};
+    `, (err, result) => {
+      if (err) throw err;
+      console.log('Updated %s rows.', result.rowCount);
+       db.end();
+    });
+  });
+});

ch09-databases/listing9_4/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "listing9_4",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "pg": "^6.1.2"
+  }
+}

ch09-databases/listing9_5/create-tables.js

@@ -0,0 +1,16 @@
+const pg = require('pg');
+const db = new pg.Client({ database: 'articles' });
+
+db.connect((err, client) => {
+  db.query(`
+    CREATE TABLE IF NOT EXISTS snippets (
+      id SERIAL,
+      PRIMARY KEY(id),
+      body text
+    );
+  `  , (err, result) => {
+    if (err) throw err;
+    console.log('Created table "snippets"');
+    db.end();
+  });
+});

ch09-databases/listing9_5/index.js

@@ -0,0 +1,15 @@
+const pg = require('pg');
+const db = new pg.Client({ database: 'articles' });
+
+db.connect((err, client) => {
+  if (err) throw err;
+  console.log('Connected to database', db.database);
+
+  db.query(`
+    SELECT * FROM snippets ORDER BY id
+  `, (err, result) => {
+    if (err) throw err;
+    console.log(result.rows);
+    db.end();
+  });
+});

ch09-databases/listing9_5/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "listing9_5",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "pg": "^6.1.2"
+  }
+}