Chris Blunt

Hi, I'm Chris.

I'm a consultant and software developer based in Plymouth, UK. This site is a collection of tutorials, thoughts and things I've learned in code, life and running my business.

Today, I mostly help people and organisations who use Ruby on Rails. I enjoy learning new tools and technologies, though, as well as the art of business. This means I'm often dabbling with new languages and frameworks, and posting what I learn. My now page describes what currently has my attention.

You can follow and contact me on Twitter, Instagram, LinkedIn, and Facebook.

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Rails on Docker: Getting Started with Docker and Ruby on Rails

Docker is a fantastic tool for isolating your app and its environment, and allows easy distribution and state-replication across multiple environments (dev, test, beta, prod, etc.). Using Docker can get rid of the “it works on my machine” problem, and help you to easily scale your app as it grows.
Posted in rails, ruby, docker

How to Fix Missing SD Card on Android Emulator

Whilst testing an app on the Jelly Bean emulator, I couldn’t get the emulator to mount the SD card. Calls to Environment.getExternalStorageState() would always return Environment.MEDIA_REMOVED.
Posted in tips, android, emulator

How to Pass Data From Rails to Javascript / Coffeescript

If you want to pass data between Rails and Coffeescript in your apps, you’ll find that interpolation doesn’t work. For example:
Posted in rails, ruby, coffeescript

3 Ways to Keep Your Ruby on Rails Apps Healthy

Ruby on Rails is a great framework for building modern web applications. But as with any technology, things move on quickly. Without proper care and attention, the web apps and sites you build using Rails can start to degrade. This means slow pages, security vulnerabilities and your users seeing error screens.
Posted in rails, ruby

Rails on Docker: Quickly Create or Update Your Gemfile.lock

As I migrate all of my Rails apps to Docker, I’ve learned to avoid making changes to the Gemfile whenever possible.
Posted in rails, docker, bundler

Rails: Generating Polymorphic URLs when Model name does not match Route

Given a slugged generic model for which you want to generate a URL at runtime, you can usually just call:
Posted in rails, howto, programming

Android: Toggling Your App's Theme

I was recently asked how an app’s theme can be toggled by the user in Android. This is a nice feature that is often seen in reading apps.
Posted in howto, programming, android

Using TinyMCE Content CSS with Rails Asset Pipeline

Recently, whilst building a small CMS system using TinyMCE and the tinymce-rails gem, I needed to inject some custom CSS so that the editor’s styles matched those of the site.
Posted in rails, howto, programming

Rails: Rendering Dynamic SVG Images in respond_to

SVG is a vector image described in XML. This post shows how to to render SVG images inline with Rails.
Posted in rails, howto, programming

Android: Consuming a Remote JSON API with Volley

In the previous tutorial, you learned how to use Volley’s built-in networking tools to quickly download a network resource and display the results. Volley removes lots of boiler-plate code, and lets you concentrate on the details of your app rather than dealing with low-level networking technologies.
Posted in howto, programming, android