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rubywizards.com
What are they? ActiveRecord callback is a tricky Rails-way method to trigger some code in different phases of persisting model object. Example: class Order < ApplicationRecord before_save :set_total after_commit :send_order_confirmation…
The first script ensures your Sidekiq instances would act properly on each application deployment: commands: create_post_dir: command: "mkdir -p /opt/elasticbeanstalk/hooks/appdeploy/post" ignoreErrors: true files: "/opt/elastic…
Imagine that you develop an e-commerce platform. Your basic model is Order. You would have some constraints which don't have to be valid before order is placed: validates :order_items, length: {minimum: 1}, unless: :cart? validates_presence…
blog.devvpk.com
&., called “safe navigation operator”, allows to skip method call when receiver is nil. It returns nil and doesn't evaluate method's arguments if the …
Hello, I use code snippets rather than long English paragraphs to explicate the working. Let's take a look at Ruby's try method:
