Pitfalls of Rails db transactions
Rollback Rails transaction and rescue error to display it good: This is fine record = MyModel.last error_for_user = nil begin ActiveRecord::Base.transaction do # ... record.save! end rescue ActiveRecord::RecordInvalid => e # do something with exception here error_for_user = "Sorry your transaction failed. Reason: #{e}" end puts error_for_user || "Success" source, source2, source3 This is ok as wel
Ruby Sinatra on AWS Lambda
29.11.2018 AWS Lambda announced official Ruby Support. That means we all can build Serverless applications (or FaaS scripts) with the language that we love. AWS in the same article also provided quite decent step by step manual for creating AWS Lambda functions but also how to run Sinatra application on AWS Lambda with a code sample project AWS Lambda - serverless Sinatra app example In this artic
Lesson learned after trying functional programming (as a Ruby developer)
I’m a Ruby developer since early 2010 and big fan of Object Oriented Programming (OOP) always extending my knowledge around it. But as a part of OO growth it’s required to play around with new concepts and ideas and see where they take you. And that’s what I was doing past 2 years in free time with Elixir (a functional programming language). Recent years there is quite a rumble around functional p
AWS ElasticBeanstalk deployment hooks
…or: How to run a script after Elastic Beanstalk deployment finishes. In this article we will have a look on AWS ElasticBeanstalk post/pre deployment script running. I will assume you know how eb CLI works, I assume you know how to use eb deploy to do the deployment and I assume you are executing command from a folder where is your .elasticbeanstalk/config.yml (or Dockerrun.aws.json) I will be upd
PATCH vs PUT and the PATCH JSON syntax war
There are several articles/discussions on parallels of PUT vs PATCH and when to use one before other. Also the main struggle recent years seems to be how to translate the RFC proposal for PATCH JSON format. I’ve decided to spam the internet with one more opinionated article on this topic trying to explain everything one more time. First of all I’m a Ruby on Rails developer so I will reference some
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