FactoryBot transient attributes can pass custom values into associated records, letting parent factories build children with dynamic names and flags.

How it works

See the lemonade descriptions.

Unfortunately, the gem has a few problems:

• it does not work with Sass2
• it always generates all sprites when the sass file changes, which is too slow for big projects
• it expects a folder structure quite different to our usual

All these problems are solved for us, in our own lemonade fork. This fork has since been merged to the original gem, maybe we can use t...

ActiveRecord association macros do not replace existing instance methods with the same name, so custom methods can still shadow belongs_to and has_many accessors.

RubyMine rubymine:// links can fail on GNOME/Linux, blocking better_errors from opening source files in the editor. A custom desktop handler and BETTER_ERRORS_EDITOR_URL make file jumping work.

View specs can crash on undefined helper methods; enabling config.action_controller.include_all_helpers or including helper modules makes view rendering work.

Whenever needs application set in Capistrano so cron entries keep a stable identifier and do not accumulate duplicate jobs across deploys.

Webpacker configuration can be hard to inspect when builds misbehave; dumping the environment, using browser or Node debugging, and emitting warnings help reveal the active webpack settings.

Configure .rspec to load spec_helper or rails_helper automatically, avoiding repeated require lines in every spec and making parallel test setups work with .rspec_parallel.

DB BAHN order numbers on credit card statements can be used to look up details of past rides on the Deutsche Bahn ticket portal.

Scoped associations can block parent deletion when dependent records should remain valid; a cleaner callback setup and an example clarify the restriction.

Consul 0.4.0 adds temporary power switching, support for Ruby collections and arbitrary objects as powers, and drops the ActiveSupport::Memoizable dependency.

Test database setup can drift from development when schema dumps omit SQL-specific details; choose the right Rake task to keep structure, charset, and collation aligned.

MySQL 5.6 rejects default values on BLOB and TEXT columns, blocking migrations that rely on them. Adjust the migration, move defaults into the application, or temporarily change sql_mode.

Monitor logs across multiple app servers from one terminal and avoid missing per-host errors; LOG selects another file, and terminal line truncation can hide long entries.

For all of my professed admiration of Ruby on rails, I personally don't think that easier and more productive CRUD application writing will shake things up. I personally care very much about writing applications in a tenth of the time, but using Rails is like listening to Jaco Pastorius. The real learning experience comes when you try to duplicate the feat.

The ancestry gem allows you to easily use tree structures in your Rails application.

There is one somewhat unobvious pitfall to it: its way of applying the orphan_strategy which defines how it handles children of an object going to be destroyed.

What's this all about?

In many cases you might want to disallow destruction if there are any child nodes present. The restrict strategy does the trick but raises an exception when destroy is called:
has_ancestry :orphan_st...

Install gem and plugin

sudo gem install parallel
script/plugin install git://github.com/grosser/parallel_tests.git

Adapt config/database.yml

test:
  database: xxx_test<%= ENV['TEST_ENV_NUMBER'] %>

Create test databases

script/dbconsole -p
CREATE DATABASE `xxx_test2`;
...

Generate RSpec files

script/generate rspec

(you'll probably only let it overwrite files in script/)

Prepare test databases...

sudo cannot find Ruby gem executables on Ubuntu because gem binaries live outside its secure path; symlinks, a different bindir, or changing secure_path work around it.

ActiveSupport::Memoizable can return wrong results when a memoized method is called with arguments, because true may trigger recomputation instead of being passed through.

Spreewald keeps Cucumber-style web steps available while adding reusable steps for emails, tables and time travel in a Ruby gem.

Be careful when using params.merge as params is a HashWithIndifferentAccess.

Why?

Usually this should not be an issue but it turns crazy if you try to include associated models deeper than 1 level:
options = params.merge(:include => { :user => :avatar })
Post.paginate options

When inspecting the merged params you will get something like this:
{ :include=> { "user" => :avatar }, :page => 23 }

Here the :user symbol in the hash of inclusions turned into a "user"...