Sometimes it is useful to define a named scope by implementing a static method with the scope's name on the scoped class. For instance, when a method should decide...
...which existing scope should be the next link in the scope chain. Take this class for example: class Meal < ActiveRecord::Base named_scope :for_date, lambda { |date| :conditions => { :date => date...
...Railses. Consul now uses Memoizer for this. Temporarily change the current power When you set Power.current to a power in an RSpec example, you must remember to nilify it afterwards...
...Otherwise other examples will see your global changes. A better way is to use the .with_power method to change the current power for the duration of a block:
We used zeroclipboard.js in some of our projects but now we switched to clipboard.js because it does not rely on flash. Flash support of the major browsers has ended.
...more advantages of clipboard.js: it consists only of a single javascript file, so it does not trigger additional requests with rails it automagically provides user feedback by selecting the text...
...extremely popular amongst front-end developers the last couple of years. This isn’t surprising, as it has made it a lot easier for us to create dynamic layouts and...
UI sortable helps reordering items with drag 'n drop. It works quite fine. Proven configuration for sorting table rows When invoking the plugin, you may pass several options. This set...
...causing the thead border-bottom to grow // when the first table row is dragged tr.ui-sortable-helper:first-child + tr > td border-top: none
Ruby's standard library includes a class for creating temporary directories. Similar to Tempfile it creates a unique directory name. Note: You need to use a block or take care...
...of the cleanup manually You can create a prefix and suffix e.g. Dir.mktmpdir(['foo', 'bar']) => /tmp/foo20220912-14561-3g93n1bar You can choose a different base directory than Dir.tmpdir e.g. Dir.mktmpdir('foo', Rails.root.join('tmp...
...is pretty useful, but manipulating values of arrays can be awkward because of its syntax. Consider the following users table which each example below will start from: name topics
Bob {llamas} (PostgreSQL uses curly braces to represent arrays, true story.) Adding values Use the array_cat function, or the || operator. These calls will add the values "cats...
You can use JavaScript to get or set cookie values on the client. Using the vanilla JavaScript API In JavaScript, document.cookie is an accessor to all cookies on the current...
...site. It looks like a String, but its setter is actually more powerful. When setting cookies this way, remember to set the path=/ option. Reading cookies A result may look...
Our old solution for cronjobs, the "craken" plugin, is no longer maintained and does not work on Rails 3.2+. We will instead use the whenever gem. "Whenever" works just like...
...craken", by putting your rake tasks into the server's cron table. Everything seems to work just like we need it. Installation for new projects Add "whenever" to your Gemfile...
When using the asset pipeline your assets (images, javascripts, stylesheets, fonts) live in folders inside app: app/assets/fonts app/assets/images app/assets/javascripts app/assets/stylesheets With the asset pipeline, you can use the...
When you deploy, Rails runs assets:precompile which precompiles all assets into static files that live in public/assets. This way you have all the performance of static files...
ActionMailer per default uses http as protocol, which enables SSL-stripping. When a logged-in user follows an http link to your application, it sends the cookies along with it...
...to send emails from public parts of your application with HTTP links and emails from SSL-protected parts with HTTPS, build a before_filter. If you need certain links with...
...inherited methods but call the parent's implementation, too. In JavaScript, there is no simple "super" method like in Ruby -- so here is how to do it with Backbone.
...own initialize method, and you'd get this console output: Hello World. How to super But we want initialize of BaseClass to run as well -- and if you want to...
...A minimum total number of forms (both blank and pre-filled) so the user sees more than just 2 blank Actor forms when she is entering Actors for the first...
...the number of total rows. By default there is no limit. You can also set defaults for built records by adding additional keys to the options hash: form.build_nested_records...
Git allows you to set push options when pushing a branch to the remote. You can use this to build an alias that automatically pushes a branch and creates a...
...merge request for it. Put this in your ~/.gitconfig in the [alias] section: mr = push origin HEAD -o merge_request.create -o merge_request.draft Now you can do git mr and a draft...
Our CI setup frequently sees this error while running yarn install: yarn install v1.22.19 [1/4] Resolving packages... [2/4] Fetching packages... error An unexpected error occurred: "https://registry.yarnpkg.com/typescript/-/typescript-3.9.7.tgz: unexpected end...
...here are some workarounds for Yarn 1. Increase Yarn's network timeout yarn config set network-timeout 600000 -g Retry yarn install until it succeeds The following will retry yarn...
Expiration of Rails sessions By default Rails sessions expire when the user closes her browser window. To change this edit your config/initializers/session_store.rb like this: ActionController::Base.session = { :key => '...', :secret => '...' :expire_after...
} In older Railses the initializer is not available. Set the option in the environment.rb instead: config.action_controller.session = { :key => '...', :secret => '...' :expire_after => 10.years } Expiration of Rails cookies In addition to the...
Let's say you have two factories that share some attributes and traits: FactoryBot.define do factory :user do screen_name 'john' email 'foo@bar.de' trait :with_profile do age 18 description...
age 18 description 'lorem ipsum' end end end You can re-use the shared fields by defining a trait outside the other factory definitions: FactoryBot.define do trait :person do...
So I had the issue that User input (coming from many different sources and users) often contains the same long word. Maybe that's a super german thing...
...compiler that crawls the document and replaces all occurencies of certain word and puts a soft-hyphen (­, or \xAD) where i want the word to break. This is only...
Moved from Less to Sass. Bootstrap now compiles faster than ever thanks to Libsass, and we join an increasingly large community of Sass developers. Improved grid system...
...added a new grid tier to better target mobile devices and completely overhauled our semantic mixins. Opt-in flexbox support is here. The future is now—switch a boolean variable...
...wanted bundle update some_gem What is wrong Let's say your Gemfile asks for some-gem which you can see when running gem list but bundle show some-gem...
...just gives you an error: Could not find gem 'some-gem', in any of the sources Another indicator: Doing a bundle install --local breaks and bundle install installs every gem...
Middleman is a static page generator that brings many of the goodies that Rails developers are used to. Out of the box, Middleman brings Haml, Sass, helpers etc. However, it...
...these gems to the Gemfile: group :test do gem 'cucumber' gem 'spreewald' gem 'capybara' gem 'selenium-webdriver' # Only for running tests in a real browser (suggested) gem 'capybara-screenshot' # Optionally...
...you need to do it yourself. It's not that hard: Get more disk space Add an extra virtual hard disk to the machine with the disk size you want...
...the CD, open a terminal (on the guest, not the host!) and become root: sudo su fdisk -l to see the disk information. \ There should be one drive with some...
ActiveRecord provides the ids method to pluck ids from a scope, but what if you need to pluck Global IDs? While you could just call map(&:to_global_id) on...
...your scope, this approach would instantiate each record just to do that. When you have many records, this will at the very least be slow. Here is a method that...
Spreewald gives you the within meta step that will constrain page inspection to a given scope. Unfortunately, this does not work with RSS feeds, as they're XML documents and...
...re inspecting XML that is invalid in HTML, you need to inspect the page source instead of the DOM. You may use Spreewald's "... in the HTML" meta step, or...