I got this error when running Rails 2.3 tests for Rails LTS. More stacktrace:

NoMethodError: undefined method `cache' for Gem:Module
    /vagrant/rails-2-3-lts-repository/railties/lib/rails_generator/lookup.rb:212:in `each'
    /vagrant/rails-2-3-lts-repository/railties/lib/rails_generator/lookup.rb:146:in `to_a'
    /vagrant/rails-2-3-lts-repository/railties/lib/rails_generator/lookup.rb:146:in `cache'
    /opt/vagrant_ruby/lib/ruby/1.8/fileutils.rb:243:in `inject'
    /vagrant/rails-2-3-lts-repository/railties/l...

Changes:

• Geordi is now (partially) tested with Cucumber. Yay!
• geordi cucumber supports a new @solo tag. Scenarios tagged with @solo will be excluded from parallel runs, and run sequentially in a second run
• Support for Capistrano 2 AND 3 (will deploy without :migrations on Capistrano 3)
• Now requires a .firefox-version file to set up a test firefox. By default now uses the system Firefox/a test Chrome/whatever and doesn't print warnings any more.
• geordi deploy --no-migrations (aliased -M): Deploy with `cap ...

Using Scenic, you can bring the power of SQL views to your Rails application without having to switch your schema format to SQL. Scenic provides a convention for versioning views that keeps your migration history consistent and reversible and avoids having to duplicate SQL strings across migrations. As an added bonus, you define the structure of your view in a SQL file, meaning you get full SQL syntax highlighting in the editor of your choice and can easily test your SQL in the database console during development.

[https://robots.thoughtb...

Note

The maintenance mode is enabled on all application server as soon as the file /public/system/maintenance.html is present.

Installation

Add this line to your application's Gemfile:

 gem 'capistrano', '~> 3.0'
 gem 'capistrano-maintenance', '~> 1.0'

Add this line to you application's Capfile:

require 'capistrano/maintenance'

Enable task

Present a maintenance page to visitors. Disables your application's web interface by writing a #{maintenance_basename}.html file to each web server. The servers m...

Ever wondered how you can create a simple table output in bash? You can use the tool column for creating a simple table output.

Column gives you the possibility to indent text accurate to the same level. Pipe output to column -t (maybe configure the delimeter with -s) and see the magic happening.

detailed example

I needed to separate a list of databases and their corresponding size with a pipe symbol: |
Here is a example list.txt:

DB	Size_in_MB
foobar	11011.2
barfoo	4582.9
donkey	4220.8
shoryuken	555.9
hadouken	220.0
k...

A comprehensive script to convert test suites from RSpec 2 to RSpec 3. This converts more than should/expect syntax.

Once Rails knows a given string is html_safe, it will never escape it. However, there may be times when you still need to escape it. Examples are some safe HTML that you pipe through JSON, or the display of an otherwise safe embed snippet.

There is no semantically nice way to do this, as even raw and h do not escape html_safe strings (the former just marks its argument as html_safe). You need to turn your string into an unsafe string to get the escaping love from Rails:

embed = javascript_tag('var foo = 1337;') # This is an h...

Changes:

• Remove some old binaries (commands still exist in geordi) and mark others as deprecated
• Rewrite deploy command to support most deploy scenarios:
  • master to production
  • feature branch to staging
  • master to staging or production to production (plain deploy)
• Improve Cucumber command (fixes #18):
  • Fix pass-through of unknown options to Cucumber
  • Add --rerun=N option to rerun failed Cucumber tests up to N times. Reboots the test environment between runs, thus will pick up fixes you made durin...

Until recently, you could open a new tab via window.open when using execute_script in Selenium tests. It no longer works in Chrome (will show a "popup blocked" notification).

This is because browsers usually block window.open unless the user interacted with an element for security reasons. I am not sure why it did work via Selenium before.

Here is an approach that will insert a link into the page, and have Selenium click it:

path = "/your/path/here"
id = "helper_#{SecureRandom.hex(8)}"
execute_script <<-JAVASCRIPT
  ...

Regular expressions in Javascript are represented by a RegExp object. There also is a regex literal as in many other languages: /regex/. However, they are used slightly differently.

Regex literal

• Usage: /foo+/
• Shorthand for creating a regular expression object

RegExp() object

• Usage: RegExp("foo+") or new RegExp("foo+")
• No surrounding slashes required (they're the literal markers)
• Since the argument is a string, backslashes need to be escaped as well: RegExp("\\d+")

Gotchas

• Regex objects [never eq...

You know that Devise offers RSpec test helpers for controller specs. However, in request specs, they will not work.

Here is a solution for request specs, adapted from the Devise wiki. We will simply use Warden's test helpers -- you probably already load them for your Cucumber tests.

First, we define sign_in and sign_out methods. These will behave just like ...

Ruby has the class Proc which encapsulates a "block of code". There are 2 "flavors" of Procs:

• Those with "block semantics", called blocks or confusingly sometimes also procs
• Those with "method semantics", called lambdas

lambdas

They behave like Ruby method definitions:

• They are strict about their arguments.
• return means "exit the lambda"

How to define a lambda

1. With the lambda keyword

   test = lambda do |arg|
     puts arg
   end
   

2. With the lambda literal -> (since Ruby 1.9.1)
   ...

Simply add this to your .rspec instead:

--require spec_helper

If you are on rspec >= 3 and use a rails_helper.rb require this instead of the spec_helper:

--require rails_helper

If you are using parallel_tests and this is not working for you, .rspec might be ignored. Try using a .rspec_parallel file.

Table of contents of the linked article:

What are Web Fonts?

• Advantages of Web Fonts
• Disadvantages of Web Fonts
  • Fallback Fonts
  • CSS3 @font Declaration Example
  • Fallback Font Example
  • Render Blocking and Critical Rendering Path
  • FOIT

Optimizing Web Font Delivery Further

• Prioritize Based On Browser Support
• Choose Only Styles You Need
• Character Sets
• Host Fonts Locally or Prefetch
• Store in LocalStorage with Base64 Encoding
• Another Method

Web Font Pe...

You can use mail-tester.com to check your application's e-mails for issues that might cause e-mails to be classified as spam.

They provide a one-time e-mail addresses that you can use to sign up etc. You can then check for scoring results of SpamAssassin and other potential issues.
You don't need to hit 10/10. Something around 9/10 is perfectly fine.

Note:

• For password-protected staging sites you will get an error for links that can not be resolved. This is fine, simply check production once available.
• ...

Note

This card does not reflect the current state of lazy loading technologies. The native lazy attribute could be used, which is supported by all major browsers since 2022.

Since images are magnitudes larger in file size than text (HTML, CSS, Javascript) is, loading the images of a large web page takes a significant amount of the total load time. When your internet connection is good, this is usually not an issue. However, users with limited bandwidth (i.e. on mobile) need to mine their data budget...

Sometimes you just want to have a small web server that serves files to test something.

Serve the current directory

On Ruby 1.9.2+ you can do the following ("." for current directory). You might need to gem install webrick on modern Rubies.

ruby -run -ehttpd . -p8000

Python 2.x offers a similar way.

python -m SimpleHTTPServer 8000 .

This is the same way with Python 3.x

python -m http.server

In both cases your web server is single-threaded and will block when large files are being downloaded from you.

WEBrick ...

When you're developing a gem, never list the same dependency as both runtime and development dependency in your .gemspec.

So don't do this:

spec.add_dependency 'activesupport'
spec.add_development_dependency 'activesupport', '~> 2.3'

If you do this, your gemspec will not validate and modern versions of Bundler will silently ignore it. This leads to errors like:

Could not find your-gem-0.1.2 in any of the sources

What to do instead

If you want to freeze a different version of a dependency for your t...

While you can use Apache as a reverse proxy, it tries to be too smart. Try nginx instead, it's much simpler to set up.

After struggling with Apache for quite a while, since I simply could not make it pass through the Digest Authentication of my target host (that I proxied to), I switched to nginx. Here is what I did.

1. Have nginx

   sudo apt-get install nginx
   

2. Define your nginx config, e.g. at /etc/nginx/conf.d/reverse-proxy.conf:

   server {
     listen 127.0.0.1;
     
     location /...
   

Quick steps

1. git rebase -i -> mark your commit with edit
2. git reset HEAD~ (remove the marked commit, but keep its changes)
3. Make several commits (optionally setting the previous author manually)
4. git rebase --continue

Detailed instructions

Basically, you will review the last n commits and stop at the splittable commit. Then you'll undo that commit and put its changes into new commits at your liking.

1. Review commits (rebase)

   git rebase -i HEAD~3
   # or
   git rebase -i origin/master
   

   ...

While you usually do not need a Content-Type on GET request (which have a blank body), an external API may still force you to send one.
Angular's $http service will strip that header when the request data (body) is blank. [1] This is possibly a misconception of RFC2616.

Here is how to send GET requests with a Content-Type header in Angular.

Example

Consider this request:

$http({ me...

You can configure RSpec 3.3+ to raise an error when attempting to stub or mock a non-existing method. We strongly recommend to do this as non-verified stubs are a footgun.

You can enable this behavior by adding the following to your spec_helper.rb:

RSpec.configure do |config|
  config.mock_with :rspec do |mocks|
    mocks.verify_partial_doubles = true
  end
end

This will also replace stub_existing from our rspec_candy.

Ruby has a set of methods to convert an object to another representation. Most of them come in explicit and implicit flavor.

There may be even more.

Don't name your methods like the implicit version (most prominently to_hash) but the like the explicit one.

Explicit conversion

Explicit conversion happens when requesting it, e.g. with the splat opera...

When you make a simple TCP connection to a remote server (like telnet), your client won't normally notice when the connection is unexpectly severed on the remote side. E.g. if someone would disconnect a network cable from the server you're connected to, no client would notice. It would simply look like nothing is being sent.

You can detect remote connection loss by configuring your client socket to send TCP keepalive signals after some period of inactivity. If those signals are not acknowledged by the other side, your client will terminat...