...like invoices/generated?number=123. This could be your (very careless) controller method: def generated send_file File.join(Rails.root, 'shared', 'invoices', params[:number]) end This allows your users not only to...
...files but also any files your application can read, like this: invoices/generated?number=../../../../../etc/passwd # => send_file '/etc/passwd' You do not want this. In most cases you should prefer a show...
Our old solution for cronjobs, the "craken" plugin, is no longer maintained and does not work on Rails 3.2+.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...
...why it’s important to find a way to order and maintain your routes. See: Clean your Rails routes: grouping Sometimes the routes.rb grows very fast and each line adds...
...confusion to it. Maybe it is time for a new approach. The quoted article suggests to split up your routes.rb into small partials to keep it clean. For example you...
If you want to expand your Areca Raid by swapping out the disks for larger ones you will need to do the following: Swap out all disks one by one...
...and wait until the syncronisation is finished in between. Reboot your server and enter the Raid Controller Configuration by pressing TAB at the right time. In the menu go the...
...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...
...common providers like the AWS one can quickly add up to a lot of storage space wasted. Each root module will download a copy of the same provider file. The...
...AWS provider is over 200 MB in size. To avoid creating multiple copies of the same file, you can use the Terraform Plugin Cache. Configuring the plugin cache:
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...
You can use attribute? as shorthanded version of attribute.present?, except for numeric attributes and associations. Technical Details attribute? is generated for all attributes and not only for boolean...
...These methods are using #query_attribute under the hood. For more details you can see ActiveRecord::AttributeMethods::Query. In most circumstances query_attribute is working like attribute.present?. If your attribute...
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...
...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...
...your remote database, you might not want it to dump each time you deploy (say, you're experimenting with staging and don't want ten dumps an hour). How to...
...skip dump creation: Capistrano 2 In your Capistrano file: before 'deploy:update_code', 'db:dump' unless fetch(:skip_dump, false) The second parameter of fetch sets a default value if...
...re looking for is not present, first try upgrading ruby-build. If it's still missing, open a request on the ruby-build issue tracker: https://github.com/sstephenson/ruby-build/issues
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...
...and extract it:\ tar xvfz rubygems-1.3.7.tgz If you previously had RubyGems installed via apt: \ sudo apt-get remove rubygems Install RubyGems:\ cd rubygems-1.3.7 && sudo ruby setup.rb
sudo ln -s /usr/bin/gem1.8 /usr/bin/gem If gem list does not show all gems you previously had, you can create a symlink to your old gem directory:\ cd /usr/local/lib/ruby && sudo...
...Consider this HTML: Hello World Lorem ipsum... Hello Universe Lorem ipsum... Now let's say you obtain a list of all such message containers as an array: messages = page.all('.message...
messages[0].find('h2', :text => 'Hello World').text => "Hello World" Now we search inside the same container as above, which contains "Hello World" as its headline. \
Most of the JavaScript snippets have code that manipulates the DOM. For that reason dom manipulating javascript code should have been executed after the DOM has loaded completely. That means...
...above would have the advantage not to pollute the global scope and to reduce unexpected side-effects...
...t requested an action for a while. Note that this is different from deleting sessions some time after the last login, which is the default. Also note that this is...
...probably a bad idea. Most sites keep sessions alive forever because having to sign in again and again is quite inconvenient for users and makes your conversion rates go down...
...a great jQuery library to make (large) fields more usable. For Bootstrap 3 there is select2-bootstrap-theme. It won't work for Bootstrap 4, but rchavik's fork does...
...if you have some. @import ~bootstrap/scss/bootstrap/variables @import ~bootstrap/scss/bootstrap/mixins @import ~font-awesome/scss/font-awesome @import ~select2/src/scss/core @import ~select2-bootstrap-theme/src/select2-bootstrap4.vars @import ~select2-bootstrap-theme/src/select2-bootstrap @import ~select2-bootstrap-theme/src/select2-bootstrap4.after
...gem 'cucumber_factory' Run bundle update on any added/changed gem, e.g. bundle update cucumber capybara selenium-webdriver database_cleaner cucumber_spinner Error messages & solutions uninitialized constant JSON -> Add gem 'json...
...to your Gemfile uninitialized constant Selenium -> Add gem 'selenium-webdriver' to your Gemfile Failing Cucumber steps that use find Capybara 1's #find method raises an error if nothing could...
...provides you some methods that help you to write readable and understandable method chains. See yourself: Example // before $('.some').show().children().doThat(); window.setTimeout(function(){ $('some').children().doSomething().hide(function() { window.setTimeout...
otherStuffToDo(); }, 1000); }); }, 500); // after $('.some').show().children().doThat() .wait(500) .doSomething().hide() . wait(1000) . otherStuffToDo(); jquery-timing transformed the setTimeout callback into a chainable method. Now the code is...
In RubyMine folders can be excluded from search, navigation etc. by marking it as excluded. You might sometimes wish to exclude single files, too. An example could be .byebug_history...
...which is located in the project root directory. Single files can be excluded by pattern in the Settings: In the Settings/Preferences dialog Ctrl+Alt+S, go to Project structure
...give you the =~ matcher: actual_array.should =~ expected_array Rspec 3 With RSpec 3's expect syntax you can choose one of these two matchers: expect(actual_array).to match_array...
...but contain_exactly takes a list of elements as varargs. Test::Unit If you install shoulda-matchers you can say: assert_same_elements([:a, :b, :c], [:c, :a, :b])