Sass Pathways
Sass’s killer feature was truly the @import statement. When a Sass file is imported, all the variables and mixins defined previously are now available in any subsequent imported file. So, it is very good practice to define a single top-level stylesheet that you link to from the <HEAD> of your page layout. In a Rails implementation, this would likely be the application.scss. This root file is then
Architecting Front-end Styles
The way that I’ve written front-end stylesheets overtime has constantly evolved. I have found myself settling into a particular pattern of how I write stylesheets and how I think about the front-end. Under this philosophy front-end stylesheets can be broken into four major categories: base, components, patterns, and views. Each is a definable part of the project overall styles, and each has their
Paperclip IS vulnerable to ImageTragick
Two days ago we announced that paperclip was not affected by the ImageTragick vulnerability. Since then we learned that paperclip is affected by the ImageTragick vulnerability, and users of paperclip should upgrade to ImageMagick 7.0.1-1 or newer, which includes the fix. Another workaround is to edit the policy to disable the vulnerable ImageMagick coders. If you deploy to Heroku’s Cedar-14 stack
ImageMagick vulnerability does not affect Paperclip
UPDATE: Paperclip IS vulnerable to ImageTragick Vulnerability CVE-2016–3714 in ImageMagick was disclosed yesterday. One of the vulnerabilities can lead to remote code execution (RCE) when processing user submitted images. See ImageMagick’s disclosure. See related paperclip issue. Updates and proof of concept will be available in imagetragick.com. The Paperclip gem makes use of ImageMagick. It veri
Avoid the Three-state Boolean Problem
Yep - it can be null. Your Boolean column is supposed to be only true or false. But now you’re in the madness of three-state Booleans: it can be true, false, or NULL. Why to avoid NULL in Boolean columns Boolean logic breaks down when dealing with NULLs. This StackOverflow answer goes into detail. For example: true AND NULL is NULL (not false) true AND NULL OR false is NULL Fortunately, it’s easy
Blocks, Procs, and Enumerable
The Enumerable module is one of my favorite parts of Ruby. It allows us to perform operations like #each, #map, #inject, and #any? on collection objects, most notably Array. It’s all much cleaner, readable, and semantic than the nested for loops I used to write in other languages. Enumerable is made possible by leveraging one of Ruby’s more powerful constructs: blocks. They typically take the form
Paperclip is ready for Rails 5
Paperclip v5.0.0.beta1 is out. It supports Rails 4.2 and 5 (latest beta), AWS SDK V2, consumes less memory, and has other improvements and bug fixes. It’s also smaller. While v4.3 branch takes around 2 hours to run on CI, master takes around half an hour. To make it so, we simplified its dependencies: v5 drops support to end-of-life’d Ruby 2, Rails 3.2 and 4.1, and to older (though not EOL’d) AWS
Parallel Gem Installing Using Bundler
Do you realize how much time you’ve spent running bundle install? ] No more sword fighting! Bundler 1.4.0 adds support for parallel installation. You can pass in --jobs SIZE as a parameter to bundle config1. I recommend setting the size to one less the number of CPU cores on your machine2. But Prem, how much time could I save Let’s benchmark this! I’m going to run bundle install on a freshly-creat
Postgres Window Functions
We recently ran into a case where a join was getting out of hand and we were struggling with how to rein in the size of it. Then we found window functions. Window functions (Oracle calls them analytic functions) are a part of the SQL standard and this post will explore how to use them in Postgres. Let’s see how they work and what kind of problems they can help us solve. Our problem Let’s say we ha
Announcing Scenic - Versioned Database Views for Rails
Database views are powerful SQL constructs that are unfortunately often overlooked by Rails application developers because views lack out-of-the-box support from Rails itself. Many of the more complex ActiveRecord scopes, relationships, and query objects we’ve come across could more clearly and composably be expressed as database views, and yet they seldom are. We’ve used database views to generat
Embedding Elixir Structs in Ecto Models
Postgres can store unstructured data such as arrays, json, and jsonb as of version 9.4. Ecto, Elixir’s database wrapper, provides first class support for serializing and deserializing Ecto structs and arrays into these native data types without sacrificing the expressiveness of Ecto models. Embedded records have all the things regular models have, such as structured fields, lifecycle callbacks, an
Naming Colors
As designers and developers, we deal with colors in everything we touch in our day-to-day work: websites, apps, editors, terminals, etc. As such, the way we name and group them greatly affects how reusable and refactor-friendly our code is. While color management is a broad topic that’s outside the scope of this article, here are some general tips, in no particular order, to make naming and organi
Validating JSON Schemas with an RSpec Matcher
At thoughtbot we’ve been experimenting with using JSON Schema, a widely-used specification for describing the structure of JSON objects, to improve workflows for documenting and validating JSON APIs. Describing our JSON APIs using the JSON Schema standard allows us to automatically generate and update our HTTP clients using tools such as heroics for Ruby and Schematic for Go, saving loads of time
Introducing JSbox Beta
We are excited to announce JSbox Beta! JSbox connects your apps together using webhooks and JavaScript. It’s similar to Zapier and IFTTT, but more flexible. For example, opening an issue on GitHub could trigger JSbox to create a corresponding card on Trello. Since events are triggered by webhooks they run immediately and since JSbox runs JavaScript, triggers can be arbitrarily complex. We came up
CSS Transitions and Transforms for Beginners
This post will introduce you to CSS transitions and CSS transforms: the CSS power couple. When used together, these properties allow you to create simple animations and add valuable interaction and visual feedback for your users. Just remember when adding any kind of movement to your project to keep it simple, subtle, and consistent. The movement you create should convey meaning, always enhancing,
Faking APIs in Development and Staging
You are a developer for startup called Movie Social Network++, building a social network for movie aficionados. Several features are dependent on data about various movies, actors, or directors. You do a quick Google search to figure out where to get this sort of data and come across movie-facts.com. They have already gathered all this data and have a team constantly keeping it up to date. They of
How To Send Transactional Emails from Rails With Mandrill
There are many libraries and services out there that make sending and tracking transactional emails in your Rails app a breeze. I’ve used Sendgrid and Postmark; both make it possible to start sending emails in a matter of minutes. But the pain points of transactional emails have not been removed entirely. The pain points of transactional emails The first pain point is styling. Tools like roadie ca
Announcing Carnival for your Site
As regular readers might know, Carnival is the service we wrote to add comments to this very blog. Today, we’re excited to announce that it’s officially ready for you to use to add comments to your own sites. Open source Carnival is a paid service, but still completely open source. That means you can see how it works, track progress, report bugs, and request features directly in GitHub. We feel th
How We Use Trello for Product Design and Development
Our playbook touches upon how we use Trello for all sorts of tasks, from projects to hiring to sales – however, it doesn’t dive deeply into how we manage our boards for each project. Each of our project boards are broken down into 6 columns: Ideas / Discussion, Next up, Doing, Code Review, Acceptance, and Week of. Our thoughtbot.com Trello board Ideas / Discussion These cards are ideas or side dis
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