Sometimes you want to have a time in a given timezone independent from you Rails timezone settings / system timezone. I usually have this use case in tests. Example
...results e.g. 2020-08-09 00:00:00 +0200 depending on the Rails timezone settings / system timezone. But in this example we always want to have the given time in...
ZSH is an alternative command line shell that includes some features like spelling correction, cd automation, better theme, and plugin support. You can replace Bash with ZSH like following:
...apt-get install zsh Setting ZSH as default login shell sudo usermod -s /usr/bin/zsh $(whoami) Opening a new terminal window will show you a dialog where you can configure your...
In rare cases you might need something like form_for (for using form builder methods on the resulting block element) but without the surrounding form. One such case would be...
...updating some of a form's fields via XHR. You can simply use Rails' fields_for to do things like this in your views (HAML here): - fields_for @user do...
Using ActiveRecord's #signed_id and .find_signed methods you can create URLs that expire after some time. No conditionals or additional database columns required...
...was typical approach for object oriented languages, designed in the 90s. A thread is sequence of instructions that can be scheduled and executed in the context of a process. Several...
...at the same time. Ruby’s VM process allocates a memory heap, which is shared and writable by threads. If incorrectly coordinated, those threads can lead to unexpected behaviors...
Rails ships with two separate build pipelines: Sprockets ("asset pipeline") and Webpacker. Webpacker has many more moving parts, but allows us to use ES6 modules and npm packages (through Yarn...
...does for JavaScript roughly what Bundler does for Ruby. Read the first couple of sections of its official documentation. You should learn how to: Install and update packages Remove packages...
change_association :parent, class_name: 'Parent::AsForm', inverse_of: :children end When saving a Parent::AsForm record with nested Child::AsForm records, the children will not be saved...
...case where you override the association with has_many :children,...
...and belongs_to :parent, .... Solution This can be fixed with appending autosave: true to the Parent model: class Parent < ApplicationRecord...
2.ordinalize # => "2nd" 1002.ordinalize # => "1002nd" 1003.ordinalize # => "1003rd" -11.ordinalize # => "-11th" -1001.ordinalize # => "-1001st...
...frame('iframe-id') do fill_in 'E-mail', with: 'foo@bar.com' fill_in 'Password', with: 'secret' click_button 'Submit' end Instead of the frame's [id] attribute you may also pass...
If you're also using Cucumber you could make a meta-step like this: When /^(.*?) inside the (.*?) frame$/ do |step_text, frame_id| page.within_frame(frame_id...
When CoffeeScript was added to Rails 3.1 they forgot one very important part, the ability to use it when responding...
S3cmd is a free command line tool and client for uploading, retrieving and managing data in Amazon S3. S3cmd reads its configuration by default from ~/.s3cfg, which is created once...
...you run s3cmd --configure. If you have many configurations, we recommend to always specify the configuration you want to use. This prevents applying actions to the wrong bucket. Examples:
...dependeny of capybara gem 'nokogiri', '< 1.6' # dependency of capybara gem 'rubyzip', '< 1' # dependency of selenium-webdriver, rubyzip 1+ requires Ruby 1.9 gem 'cucumber_factory' gem 'database_cleaner', '< 1'
...spinner', '~> 0.2.5' gem 'launchy', '~> 2.1.2' With these versions set, selenium-webdriver will be at version 2.35.1. This is because all later versions depend on rubyzip 1+. More info. After upgrading...
...image formats like JPG or PNG, each pixel is basically drawn on a fixed size canvas. To display such an image in a different size (say: 1.5 times larger than...
...Monitor) needs to interpolate the color values of missing pixels. The image will appear slightly blurred. This is different for vector graphics like the SVG (Scalable Vector Graphics) format. You...
...you upgraded it everywhere. But because it's FreeBSD it does not restart running services. After every old version is removed from /var/cache/pkg you restarted collectd and it does not...
...start anymore, you really want to downgrade to 5.8.1 again. But even pkg now has 5.9.0 and you need your own make config setup anyway. portdowngrade Enter portdowngrade. Install it...
When you need the DOM node of a tag (e.g. to read extra attributes, or to modify the DOM near it), you can usually reference it via document.currentScript. However, document.currentScript is unsupported in ancient browsers, like Internet Explorer 11 or wkhtmltopdf's Webkit engine. If you are not running async scripts, you can easily polyfill it: document.scripts[document.scripts.length - 1] It works because document.scripts grows with each tag that was evaluated. That is also the reason why this solution will not work reliably for async code. Demo: https://codepen.io/foobear/pen/poRLxQm
...format ("2021-02-22T20:34:53.686Z") Google API guideline: https://google.aip.dev/ Numbers: String vs. Number The JSON number type is not a double. It's just a number...
...parsed as whatever the parser finds fitting. Pagination: Limit + Offset vs. Object ID / Pointer vs. System-Version Tables Filter Attributes e.g. ?fields=f1,f2,f3 Version in path (/api/v1/) or...
...with more than one developer should always consider to enforce code review even for small changes to improves the overall code health of the system. Here are some guidelines that...
...perfect pull request Google Google's Engineering Practices documentation Modern Code Review: A Case Study at Google Thoughtbot Thoughtbot' Code Review Guideline
PostgreSQL and ActiveRecord have a good support for storing dynamic attributes (hashes) in columns of type JSONB. But sometimes you are missing some kind of validation or lookup possibility (with...
...plain attributes you can use Active Record's built-in validations and have your schema.rb). One approach about being more strict with dynamic attributes is to use JSON Schema validations...
jQuery is still a useful and pragmatic library, but chances are increasingly that you’re not dependent on using it in your projects to accomplish basic tasks like selecting elements...
...styling them, animating them, and fetching data—things that jQuery was great at. With broad browser support of ES6 (over 96% at the time of writing), now is probably a...
...Invoked Function Expessions (or IIFEs) to prevent local variables from bleeding into an outside scope: (function() { var foo = "value"; // foo is scoped to this IIFE })(); In Coffeescript an IIFE looks...
(-> foo = "value" # foo is scoped to this IIFE )() There is also a shorthand syntax with do: do -> foo = "value" # foo is scoped to this IIFE
...aws-credential-file ./aws-credential.txt The output should look something like this: arn:aws:iam::322191361670:server-certificate/www.example.com arn:aws:iam::322191361670:server-certificate/testCert Now you have to upload...
...and includes the server certificate Amazon Resource Name (ARN) and GUID: arn:aws:iam::322191361670:server-certificate/www.example.com-2011 ASCACexampleKEZUQ4K If you got the error message similar to A client error...
Here is some JavaScript code that allows you to click the screen and get the clicked element's text contents (or value, in case of inputs). The approach is simple...
...element. When you click the overlay, we look up the element underneath it and show its text in a browser dialog. You can then copy it from there.
...To reconfigure later, call s3cmd --configure. Once you're done setting up, s3cmd gives you shell-like commands like s3cmd ls or s3cmd del somefile.png. Here is a full list...
s3cmd accesslog s3://BUCKET Sign arbitrary string using the secret key s3cmd sign STRING-TO-SIGN Sign an S3 URL to provide limited public access with expiry
...model inherits from others or uses many concerns / traits, it might be hard to see in the code which validators it has. But fortunately there's a method for that...
...UniquenessValidator:0x00007f55f1417e88 @attributes=[:name], @klass=UserGroup (call 'UserGroup.connection' to establish a connection), @options={:case_sensitive=>true, :scope=>:partner_id}>, #<ActiveModel::Validations::NumericalityValidator:0x00007f55f1415200 @attributes=[:user_count_limit], @options={:greater_than...