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Displaying posts with tag: Tutorials (reset)
Percona Live 2017 Tutorials Day

Welcome to the first day of the Percona Live Open Source Database Conference: Percona Live 2017 tutorials day! While technically the first day of the conference, this day focused on provided hands-on tutorials for people interested in learning directly how to use open source tools and technologies.

Today attendees went to training sessions taught by open source database experts and got first-hand experience configuring, working with, and experimenting with various open source technologies and software.

The first full day (which includes opening keynote speakers and breakout sessions) starts Tuesday 4/25 at 9:00 am.

Some of the …

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Test a Flask App with Selenium WebDriver – Part 2

This is the second and final part of a tutorial on how to test a Python/Flask web app with Selenium webdriver. We are testing Project Dream Team, an existing CRUD web app. Part One introduced Selenium WebDriver as a web browser automation tool for browser-based tests. By the end of Part One, we had written tests for registration, login, performing CRUD operations on departments and roles, as well as assigning departments and roles to employees.

In Part Two, we will write tests to ensure that protected pages can only be accessed by authorised users. We will also integrate our app with CircleCI, a continuous integration and delivery platform. I have included a demo video showing all the tests running, so be sure to check it out!

Permissions …

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Build A Support Ticket Application With AdonisJs – Part 1

AdonisJs is a MVC Framework for Node that is greatly inspired by the Laravel framework and borrows some of it concepts. AdonisJs follows the software paradigm of conventions over configuration which allows you focus on building your application rather than waste time on configurations. AdonisJs uses ES2015 Generators which removes the unnecessary callbacks from your code.

To explore more about AdonisJs, checkout this tutorial by the creator of Adonis: Meet AdonisJs! A Laravel-style MVC Framework for Node.js.

In this tutorial, we'll to be building a support ticket application. Some times ago, I did a tutorial on …

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Test a Flask App with Selenium WebDriver – Part 1

Ever wondered how to write tests for the front-end of your web application? You may already have functional back-end tests, for example to ensure that your models and views are working. However, you may be unsure how to simulate a user of your app for testing. How can you test front-end functions like registration and logging in, which are done in a browser?

In this two-part tutorial, I will show you how to write front-end tests for an existing Python/Flask web application. You should therefore already have a functional application, along with a virtual environment with the necessary software dependencies installed. We will use Project Dream Team, a CRUD web app I built in a three-part tutorial (here is Part One, Part Two and …

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How to secure your LEMP stack

LEMP, it stands for Linux, (EngineX) NGINX, MariaDB (or MySQL) and PHP. Due to its flexibility and simplicity, NGINX slowly takes over the Internet. In this tutorial, we will attempt, through examples of bad and good practices, to go through the steps of properly securing your Linux web server. So what is the term Security? Often you can hear the IT Engineers saying “Our network is secure” or “Our servers are secure” however, those sentences although widely used are technically not correct, as in many books and publications you can find that Security as a term is not a static value, but rather a degree. From […]

Get Started Running Laravel in a Docker Container

Laravel and Docker are two very popular tools of choice when considering building for the web. Although both of them do very different things, they can both be combined to create amazing products.

For our use case, we will be running Laravel in a Docker container. This is going to be a simple demonstration on how to use both products to create real-life applications. Nothing heavy.

While this article is made to cater for everyone who will be reading it, the article assumes you already have a working basic knowledge of both Docker and Laravel.

Prerequisites

Before you start, you need to have some certain prerequisites in place:

  • Local machine running the latest version of Docker, v1.13.1 at the time of writing this article.
  • Local machine running the latest version of …
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What’s New in Laravel 5.4

If you've been following Scotch for a while, you heard a lot about Laravel. Some months ago, Laravel 5.3 was released. It introduced new features like Mailables.

Yesterday, the 25th of January, Laravel 5.4 was released.

It comes with no surprise that it brought a lot of new and exciting features to Laravel, and for the remainder of this article, we shall go through the new features.

New Middlewares

With the release of 5.4, two new middlewares are now shipped with the framework. If you don't know what middlewares are, check out Understanding Laravel Middlewares. …

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Working with JSON in MySQL

SQL databases tend to be rigid.

If you have worked with them, you would agree that database design though it seems easier, is a lot trickier in practice. SQL databases believe in structure, that is why it's called structured query language.

On the other side of the horizon, we have the NoSQL databases, also called schema-less databases that encourage flexibility. In schema-less databases, there is no imposed structural restriction, only data to be saved.

Though every tool has it's use case, sometimes things call for a hybrid approach.

What if you could structure some parts of your database and leave others to be flexible?

MySQL version 5.7.8 introduces a JSON data type that allows you to accomplish that.

In this tutorial, you are going to learn.

  1. How to design your database tables using …
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Making a RESTful API with Hapi.js

Introduction

As the century dawns, we see new technologies and architectures which companies, startups and developers, alike, are using to power their next big application; some of these architectures have been so throughly battle-tested, that some companies are even scrapping old application just so that they can implement this modern, new (and sclable) approach.

One of these architectures is the Representational State Transfer or REST as the people call it. In this architecture, the server talks in terms of resources, and then uses HTTP verbs to perform actions on those resources. A quick detour of this architecture has been taken in a following section.

With Node.js, it’s not doubt that it’s super-easy to implement a quick RESTful API and be up and running in no time; however, there are quite a few considerations before someone thinks of implementing a scalable, …

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How to set up MySQL Cluster on Ubuntu

The MySQL NDB Cluster integrates the standard MySQL server with an in-memory clustered storage engine called NDB (Network DataBase). In this tutorial, we will show you how to set up MySQL Cluster on an Ubuntu 16.04 VPS. We will use a total of 4 virtual servers, one for the management, one SQL node and two data nodes: 172.16.1.1 – management VPS 172.16.1.2 – SQL VPS 172.16.1.3 – data1 VPS 172.16.1.4 – data2 VPS Install and Configure MySQL Cluster on the Management VPS Download the latest version of MySQL Cluster available at http://dev.mysql.com/downloads/cluster/ to a directory of your virtual server and […]

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