Having your development environment match production helps ensure that a feature works the same in both contexts. An example of when local SSL is beneficial is whenever you are dealing with hardware specific permissions such as a webcam or microphone. This tutorial is specifically for Debian based Linux on the lvh.me domain for Google Chrome but it could also be used in other contexts.
ActiveRecord is a great tool for making SQL a more readable. However, there
are some things that are really difficult to do in pure ActiveRecord. One of those is
a SELECT * FROM (subquery) style of query. Before writing it in a raw
SQL query, check out the following tip for preserving some ActiveRecord goodness.
Overriding methods as a Rubyist is extremely natural and powerful. Recently, I did run into a circumstance where I had an ActiveRecord object with a DateTime that I needed in a specific TimeZone (based on user input). If you ever have tried to override the getter for an attribute with the same name and have been stumped, this article details one way of making it work.
I’ve been refactoring quite a bit of legacy code recently. I love this kind of work because you get to architect new patterns and code pathways for future developers to use. Right past mistakes and make the future of the application just a bit brighter. My most recent refactoring involved converting an Enum based architecture to utilize Rail’s Single Table Inheritance setup. So what does it take to move from one architecture to another? Keep reading to find out strategies that I use to help keep bugs to a minimum while ensuring that end-users experience zero downtime.
I’m by nature a kinesthetic learning or someone that learns by doing. One of the ways I learn new Ruby codebases or techniques is to dive into them and see how they work during every step of their processing. Pry is a great tool for allowing me to dig directly into code. While, really useful for debugging and understanding, one thing that has bothered me about using Pry is that it doesn’t work properly with classes that inherit from SimpleDelegator. Instead it ends up in a method_missing block. Luckily, I recently learned a great workaround for this issue which we’ll get into below.
The beginning steps to writing a new class usually involve writing a quick
def initialize method. The purpose of these type of methods is to
setup any dependencies or configurations necessary for the object to fulfill its
responsibility. With instance variables, a common paradigm is to use an attr_reader
or attr_writer to read/write values. However, these methods specifically work
off of instance variables.
SublimeLinter is an excellent tool for linting new code quickly and efficiently. Version managers like rvm, nvm, and asdf are also great tools for smoothly switching between projects with different version requirements. Getting both SublimeLinter and version manager to play nice can sometimes be challenging. I’m going to quickly talk about the simple steps I took to getting ESLint and asdf to work with SublimeLinter below.
When dropping a database table in a migration all data contained within the dropped table will be lost as well. This is to be expected since the table schema no longer exists. However, it is possible to make such a migration reversible so that at least the database structure is preserved.
Deploying a new blog with Github Pages is a breeze. All you need is a new repo named after your Github username
Github also kindly provides several whitelisted plugins for ease-of-use which can be found here. Unfortunately, some of these are a bit outdated (I’m looking at you jekyll-paginate). More bad news is that because the plugins are whitelisted you can’t use any other plugins.
We’re developers though, like a whitelist will stop us…
Recently, I ran into an issue with migrating data from one table to another incorrectly set the sequence for the new table’s primary key. The issue stemmed from inserting all the data from one table into another.