...any of the gems that GEM depends on. For the example above you would say: bundle update cucumber-rails --conservative If Bundler cannot update due to transitive dependencies, check if...
...for old versions of bundler The options below might be relevant if you're stuck with Bundler < 1.14: Option 1 This will work if all dependencies for the update are...
...want some output. In Rails > 3.1 you have two methods at hand: announce and say_with_time. In the migration: class AddUserToken < ActiveRecord::Migration class User < ActiveRecod::Base; end
add_column :users, :token, :string announce "now generating tokens" User.find_in_batches do |users| say_with_time "For users ##{users.first.id} to ##{users.last.id}" do users.each do |user| user.update_attribute :token...
If you are using our opscomplete.com hosting we can set all environment variables mentioned below for your deployment on request. If you're lucky DO_NOT_TRACK=1 opts...
...are collecting data only after you opt into that. ng analytics --global disable Storybook https://storybook.js.org/docs/configure/telemetry npm run storybook -- --disable-telemetry npm run storybook -- --disable-crash-reports export STORYBOOK...
$number = $length / 1px // => 13 Converting a unit the result of an addition or subtraction between two numbers of different units is expressed in the first member’s unit
...the desired unit: $duration: .21s $duration-in-milliseconds: 0ms + $duration // => 210ms An example is storing a transition duration as CSS custom property to read it from Javascript. By converting the...
...want to be in there. In order to reduce the chance to accidentally commit something you didn't intend, review your changes before committing. My preferred way of doing this...
...N . # Add all paths, but not their contents git add -p Git will now show you all your changes in small chunks and ask you in an interactive mode whether...
PostgreSQL's Common Table Expressions (CTEs) can be used to extract sub-queries from bulky SQL statements into a temporary table to be referenced instead. This is most useful to...
...avoid ugly joins or sub-selects. CTEs can be used for SELECT, INSERT, UPDATE or DELETE. Example (from the PostgreSQL docs): WITH regional_sales AS ( SELECT region, SUM(amount) AS...
...can use ETags to allow clients to use cached responses, if your application would send the same contents as before. Besides what "actually" defines your response's contents, your application...
...probably also considers "global" conditions, like which user is signed in: class ApplicationController < ActionController::Base etag { current_user&.id } etag { current_user&.updated_at } end Under the hood, Rails generates...
...default order" of rows in database tables. For instance, when you paginate a result set: When using LIMIT, it is important to use an ORDER BY clause that constrains the...
...result rows into a unique order. Otherwise you will get an unpredictable subset of the query's rows. You might be asking for the tenth through twentieth rows, but tenth...
...you prepare your changelist properly, it directs your reviewer’s attention to areas that support your growth rather than boring style violations. When you demonstrate an appreciation for constructive criticism...
...your reviewer provides better feedback . Make others better: Your code review techniques set an example for your colleagues. Effective author practices rub off on your teammates, which makes your job...
...will tell you if there are any and you should not commit when you see them. So go ahead and switch your editor/IDE to automatically remove them for you.
Note that except for RubyMine, the following changes will remove trailing white-space on all lines, not only those that you changed. While this should not be a...
Simplecov is a code coverage tool. This helps you to find out which parts of your application are not tested. Integrating this in a rails project with rspec, cucumber and...
Add it to your Gemfile and bundle group :test do gem 'simplecov', require: false end Add a .simplecov file in your project root: SimpleCov.start 'rails' do
# features/support/database_cleaner.rb DatabaseCleaner.clean_with(:deletion) # clean once, now DatabaseCleaner.strategy = :transaction Cucumber::Rails::Database.javascript_strategy = :deletion Cucumber & Rails 2 The latest available cucumber-rails for Rails 2 automatically uses database...
...off. To have database_cleaner work correctly: Add the attached database_cleaner.rb to features/support/ Make sure features/support/env.rb contains the following lines in this order: # features/support/env.rb require 'features/support/database_cleaner' require 'cucumber/rails/active_record' require 'cucumber/rails/world...
If your app does not need to support IE11, you can use most ES6 features without a build step. Just deliver your plain JavaScript without transpilation through Babel or TypeScript...
...and modern browsers will run them natively. Features supported by all modern browsers include: fat arrow functions (() => { expr }) let / const class async / await Promises Generators Symbols Rest arguments (...args)
...good UI design, you should always be able to come up with a default. Since the user interface makes up 70% of a typical web application, this is closely related...
...and a "user" are both human beings, it's rarely practical to have them share a model or inheritance hierarchy. Try to model everything as CRUD (regardless of whether a...
Splitting up commits makes the process of reviewing often easier, since you can create several merge requests or review every commit one by one. So when you find out that...
...refactoring along the current changes, you can use one of the following processes to split up the changes into several commits in a logical order: #1 Splitting up the last...
Bundler so far ignored the version specified under BUNDLED_WITH in the Gemfile.lock. This had two annoying consequences: If the bundler version on your system was lower than in the...
...and had to manually install the correct version. If the bundler version on your system was higher than in the Gemfile.lock, bundler silently updated the version in the Gemfile.lock to...
You need to update a lof gems. Make sure you don't have any version constraints in your Gemfile or your bundle update won't do anything!
...cucumber_priority: bundle update cucumber_priority Upgrade spreewald: bundle update spreewald Upgrade cucumber_factory: bundle update cucumber_factory Upgrade parallel_tests: bundle update parallel_tests Even on the latest version...
In long diffs, it can become impossible to spot small changes in larger blocks of moved code. This may be either a method that was moved from the top to...
...the bottom of a file, or a long test file that was split in many. Fortunately, Git offers a special highlighting mode that directs the reader's attention to relevant...
...with information from an associated table, you can JOIN the associated table into the statement. Example Let's say you have a database schema where an Employee belongs_to :department...
Now you need to backfill existing Employee records with the new department_name. Since the department's name lives in another table, you need to JOIN both tables during...
Sometimes it's nice to have some coloring in your logs for better readability. You can output your logs via tail and pipe this through sed to add ANSI color...
...containing "FATAL" in red and all lines with "INFO" in green: tail -f /path/to/log | sed --unbuffered -e 's/\(.*INFO.*\)/\o033[32m\1\o033[39m/' -e 's/\(.*FATAL.*\)/\o033[31m...
The File System Access API is a new capability of modern browsers that allows us to iterate over selected folders and files on a user's machine. Browser support is...
...not great yet, but if the feature is only relevant for e.g. a single admin user it could still be worth using it prior to wider adaption instead of building...
...only tidies up your own code, but also makes it easier to write future specs. However, not all situations are well-suited for that. Sometimes the effort isn't worth...
...would need too many parameters to be reusable. In those cases, you can also simply extract a private method: describe `/search` do it "doesn't lose the infinite scroll's...
...hints on best practices to maintain your tasks in larger projects. Rake Tasks vs. Scripts The Rails default is using rake tasks for your application tasks. These live in lib/tasks...
...case you want to avoid rake for your tasks and just use plain ruby scripts, consider lib/scripts/* as folder. Keeping tasks slim For readability and testing it's easier to...
...of different file types including: Ruby (business logic) HTML fragments (layouts and views) CSS/Sass/SCSS (styles) JavaScript (client-side behavior) Static media (images, fonts, videos) Except for the Ruby part, all...
...your application assets cachable in Rails The assets pipeline history The section "network" of "JavaScript Start-up Optimization" Sprockets: Everything You Should Know About the Rails Asset Pipeline