Docker

Chris creates a Docker environment for Standard which is a Ruby linter. Thank you to Test Double for creating Standard.

If you have any questions you would like answered or constructive feedback please send an email to ask@saturdaymp.com.

You can find my fork of the Standard repo here. Ideally all the files in the video would be in the repo but since we ignored the Docker files at a local level, they are listed below.

Chris and Birm create a Docker image for a Node React application. Have a question or a topic you would like us to talk about then give a us a shout.

Back in the day Rails apps didn’t add foreign keys to database tables.  Believe it or not this was a feature not a bug.  The idea was that you shouldn’t “repeat” the relationship between you models in the code and in the database.  It wasn’t until Rails 4.2 that support was added for foreign keys.  

As you can probably guess I think this was a mistake.  If you have worked with a database without any foreign key constraints you quickly run into data integrity issues.  I don’t care how careful you think you are you will eventually screw up.  If not you then another person or application will corrupt your data.  Line items not attached to an order, address without customers, cats and dogs living together, etc.

I was curious to see if I could create a Docker container for a new Rails project without having Ruby or Rails installed on the host machine.  To do this I created a new Ubuntu 18 virtual machine with the bare minimum installed for the OS.  I also install Docker, RubyMine, and DataGrip.

Initially I was hoping I could just create the new project inside RubyMine.  Unfortunately I couldn’t get it working.  As you will see setting up the initial Docker container requires more then just running the “docker-compose up” command.

Working on my code example for my upcoming SQL Saturday 710 talk I ran into a performance issue.  My laptop is an older MacBook Pro and I was trying to run my example on a Windows virtual machine…

What is SQL Saturday?  Good question.

SQL Saturday is an entire day of talks, training, and socializing about databases and data storage.  SQL Saturday 710 is on May 5th in Edmonton but there are SQL Saturdays, with different numbers at the end, all around the world on different dates.