...but REST itself - in a nutshell. so here's a new angle i've started playing with: "REST Upside Down...
When you set both a record's association and that association's foreign key attribute, Rails does not realize you are talking about the same thing. The association change will...
...win in the next save, even if the foreign key attribute was changed after the association. As an example, assume you have these two models: class Group < ActiveRecord::Base
fake_stripe spins up a local server that acts like Stripe’s and also serves a fake version of Stripe.js, Stripe’s JavaScript library that allows you to collect your...
...customers’ payment information without ever having it touch your servers. It spins up when you run your feature specs, so that you can test your purchase flow without hitting Stripe...
...needed a way to make my apps full screen from bash scripts. There is no super-easy way, but it's not too hard either. Put the attached script into...
...e.g. /usr/local/bin and make it executable. Now you can call fullscreen Safari and Safari will go full screen. Notes This script needs activated access for assisting devices. Turn it on...
...can be especially painful when external code (read: gems) uses const_defined? to look something up and gets different results on different Rubies. Consider this: module Foo FOO = 42
end On Ruby 1.8, Bar won't have FOO defined as a constant since that's (even though it's accessible): 1.8.7 > Foo.const_defined? :FOO => true 1.8.7 > Bar.const_defined...
...capistrano_colors' end It's possible you need to do a bundle update net-ssh to get things running. Now double check that all your custom hooks are actually still...
...called. One candidate might be an after deploy:symlink hook that has been renamed into after deploy:create_symlink. I also suggest to put a safeguard into your deploy.rb that...
...and a damaged reputation. Deploy Ruby with confidence knowing you're using the most secure, enterprise-grade builds for the platforms that power your business. You'll get priority access...
...fail-safe Ruby for business applications, but don't require advanced features like indemnification or site-wide licensing. Business Edition customers trust ActiveState's guaranteed technical support and regular fixes...
...association. For example you can put the blank form on top with the following snippet: actors = movie.actors actors.build actors.unshift(actors.pop(1)) # won't work with Rails 4+ Because build_for...
...one-to-many association collection object you only have to reorder the collection objects. Sorting with Rails 3+ = form.fields_for :children, @parent.children.sort_by(&:name) do |fieldsform...
...OPTS="--no-tcmalloc" rbenv install, but that would disable tcmalloc. Doing that, you might still encounter issues with ossl_ssl.c -- which is where I switched to the patched solution above...
...without_callbacks. There is no such thing in vanilla Rails 3. There is a gem sneaky-save that restores the missing functionality with a #sneaky_save method...
If your Webpack build is slow, you can use the Speed Measure Plugin for Webpack to figure out where time is being spent. Note that at time of writing, Webpack...
...now have an idea where optimization might be feasible. Look around for suggestions, e.g. the sass-loader readme when you want to optimize Sass build time...
String#indent is not a standard Ruby method. When you use it, be sure to know where this method comes from. Many Gems shamelessly define this method for internal usage...
...and you'll never know when it may be removed (since it's usually not part of the Gem's API). Unless you're using Rails 4 (which brings String...
...both column name and value are coming from user input and need to be sanitized. Unfortunately this works in SQLite but does not in MySQL: named_scope :filter, lambda { |attribute...
{ :conditions => [ 'articles.? = ?', attribute, value ] } } The solution is to use sanitize_sql_array like this: named_scope :filter, lambda { |attribute, value| { :conditions => sanitize_sql_array([ "`articles`.`%s` = '%s'", attribute, value...
...on an old version of ImageMagick that you can no longer install in your system, you can choose the run an old ImageMagick in a Docker container. Dockerized ImageMagick commands...
...path arguments. You need to boot a corresponding docker container once before using it. Setting up Docker If you haven't installed Docker yet, use our guide or the official...
Webfonts are not always available when your JavaScript runs on first page load. Since fonts may affect element sizes, you may want to know when fonts have been loaded to...
...Promise that will be resolved once the font is available. Example: document.fonts.load('1rem "Open Sans"').then(() => {...
jQuery / fontSpy If your project uses jQuery, you could also use jQuery-FontSpy which...
...it's likely that your cucumber.yml is just fine but not your rerun.txt.\ This sometimes happens when running multiple Cucumber workers with parallel_tests that write into rerun.txt simultaneously -- ending...
...Just remove it and you are good to go again: rm rerun.txt Another possible solution is to have one rerun file per worker for which you'd need to modify...
Find conditions for scopes can be given either as an array (:conditions => ['state = ?', 'draft']) or a hash (:conditions => { 'state' => 'draft' }). The later is nicer to read, but has horrible security...
...versions of Ruby on Rails. Affected versions Version Affected? Remedy 2.3.18 yes Use chain_safely workaround 3.0.20 no 3.1.x ??? 3.2.22 yes Use Rails LTS 3.2 with hardened configuration...
Back in the old days, we couldn't do something like that: .foo { position: absolute; bottom: 0; /* This was bad: */ left: 10px; right: 10px; } Why? Because IE5 and IE6 (which...
...then) failed horribly trying to render it. I've now checked if this is still an issue with any browser that's not from the stone age. \
...because a printer's resolution is usually much higher than that of a computer screen. If an image absolutely must look awesome when printed, a solution is to embed the...
...image in much higher solution than needed (e.g. four times the horizontal resolution), then scale it down to the desired width using CSS. Note that this will slightly alter the...
Restricting access to cookies is essential for security in many web apps. For example, the session ID, the secret token used to identify a particular session, is typically stored in...
...a cookie. Cookies have several important settings. Previously, I discussed the secure flag. This time, let’s dive into the cookie domain. The cookie domain is an important security feature...
...variations' was not found; perhaps you misspelled it? I just was hunting down a strange error with this model: class Model placeholder = 'variations' has_many placeholder nested_scope :verbose, :include...
...work (the latter returned [ :some_association, 'variations' ]). Eventually, the quotes led me to the solution: I had to write has_many placeholder.to_sym. When Rails can't find an association...
...hard to achieve), because it is no actual "integration testing". If you use this step, know what you are doing. Destroying a record with Capybara is not as easy as...
...user, method: :delete), because RackTest's visit can only perform GET requests. With this step you can destroy a records using either Selenium or RackTest. Example: When I destroy that...
Capybara will match elements outside of a page's tag. For example, the step definitions below match nodes in a page's : Then /^my browser should auto-discover the "([^"]*)" feed...
page.should have_css( 'head link' + '[rel="alternate"]' + "[href='http://www.example.com/#{slug}/feed.rss']" + '[title="RSS feed (all cards)"]' + '[type="application/rss+xml"]', visible: false ) end Then /^my browser should...
When you create e.g. a sidebar box that contains headlines and paragraphs, the final paragraph's margin in that box will create an undesired 'bottom padding' inside that box.
...is a Sass mixin that you can apply to such boxes. It makes the last child's bottom margin disappear: =hide_last_margin >*:last-child margin-bottom: 0