Read the Rails Guide about Active Record migrations Understand why we never use models in migrations. Checkout the repository...
Learn to store attachments in a way that is accessible by authorized users only Learn to prevent users from...
Understand how asynchronous JavaScript works: Read Henning's presentation about asynchronous Javascript (there's also a German video presentation...
In a web application you often need to move data between the client (HTML, Javascript) and the server (Ruby, Rails...
Each time thin boots, it prints a boot message : Thin web server (v1.6.3 codename Protein Powder) Maximum connections set to...
Web security basics Einführung in die Web Security 🇩🇪 provides essentials for the topic of this card. Read following chapters:
CTRL + SHIFT + ALT + N Search for any symbol in your application, like CSS classes, Ruby classes, methods, helpers etc...
Authentication is all about being able to verify the identity of a user in the context of our application.
Goal of this lesson is to understand what middlewares in Rack are good for. Rack Start with these articles:
Read (or re-read) the following chapters from our book Growing Rails Applications in Practice (it’s in our...
A common task in web applications is to add client-side JavaScript behavior to existing HTML elements.
To change RAM size, VDISK size or VCPU count of an openstack instance you have to use nova resize. You...
Large projects usually have large test suites that can run for a long time. This can be annoying as running...
As developers we are dealing with many tasks every week. We need a system to organize ourselves. Goals After completing...
Learn Enough Command Line to be Dangerous (it's in our library => Google Drive) CLI tricks every developer should...
Action Mailer Basics and Previews Chapter "Task H1: Sending Confirmation Emails" from Agile Web Development with Rails (in our...
Understand at least the following CSS concepts: Classes Selecting elements for styling Basic styling (color, typography, spacing)
Git is our version control system. Goals Understand why we use git. Learn how to work with your local repository...
If you need to follow links, click buttons, etc. using Capybara inside an , you can do it like this:
CSS support in major e-mail clients is horrible. This will give you an overview what you will not be...
Since version 2.6 exception notifier distinguishes between foreground and background sections. The reason is that with background jobs (e.g. methods...
Note: Making a reverse proxy with nginx is much more straightforward. A reverse proxy is a "man in the middle...
sslscan is a nice tool to show details about TLS/SSL connections: ~> sslscan some-host-at.makandra.de Testing SSL server some-host-at.makandra.de on port 443...
Capistrano 3 is a major rework of the framework and requires several adjustments to your deploy configuration files. The biggest...