The attached article explains options you have to store the order of items in a database table.

The simplest solution of course is to use a position column. However the author explores some alternatives where you don't need to update multiple rows when you move a single item.

If the argument list is the same every time:

expect(object).to receive(:foo).with('argument').and_return('response 1', 'response 2')

If the argument list differs between invocations:

expect(object).to receive(:foo).with('argument 1').ordered.and_return('response 1')
expect(object).to receive(:foo).with('argument 2').ordered.and_return('response 2')

Boot partitions from installations prior to the 16.04 era are terribly small. When you install updates and encounter errors due to a full /boot partition, consider risizing it.

If you can't do the steps described below, ask someone experienced to help you out.
This has worked 100% so far. 1 out of 1 tries. ;)

Scenario A: There is unassigned space on your physical drive

When there is some unpartitioned space on your drive, increasing the size of /boot is actually very easy (even though the list below is rather long). It only takes a...

When you find yourself constantly ignoring a RubyMine warning, you can simple disable that warning and de-clutter your editor. E.g. in my Cucumber scenarios RubyMine underlines 90% of all lines because it does not know about spreewald, making the file really hard to read.

You can disable any unwanted inspection by opening File / Settings / Editor / Inspections and searching for the warning text.

What you disable or keep is up to your personal preference. I personally disable at least the following...

New features:

geordi delete_dumps [directory]

Recursively search for files ending in *.dump and offer to delete those. When no argument is given, two default directories are searched for dump files: the current working directory and ~/dumps (for dumps created with geordi).

geordi drop_databases

Delete local MySQL/MariaDB and Postgres databases that are not whitelisted.

Authentication is handled via PAM for Postgres and MariaDB, via .my.cnf with fallback to mysql -p for MySQL. Different connection methods can be chosen via ...

You might have some trouble running a Rails LTS 2 app with MySQL 5.7.

If you don't want to hack Mysql 5.6 into your modern Ubuntu or use the MySQL sandbox, you might want to try MariaDB 10.x.

MariaDB 10.x should work with both old and new Rails applications.

[Switch to MariaDB](https://makandracards.com/makandra/468343-how-...

On your local system that only hosts non-critical development data and only you have access to, you can store MySQL's root password in your home directory so you can use mysql commands without prompt for passwords, i.e. when doing batch processing.

Of course, this has security implications. The password must be stored in plain text, so this method is out of the question if there's any confidential data in your databases. Assuming diligent screen-locking, an encrypted hard disk and correct permissions set on your credential file, it shoul...

The httpclient gem comes with a custom SSL cert store.

While an customizable, application-level cert store is great when you need to deal with broken or self-signed certificates, you usually want to use the cert store from the underlying Linux. The Linux cert store is updated periodically while httpclient's cert store goes out of date and will eventually not be able to verify certs.

To use the cert store from the underlying operating system:

client = HTTPClient.new
client.ssl_config.cert_store...

Upgrade gems

You need to update a lof gems. Make sure you don't have any version constraints in your Gemfile or your bundle update won't do anything!

Upgrade cucumber_priority:

bundle update cucumber_priority

Upgrade spreewald:

bundle update spreewald

Upgrade cucumber_factory:

bundle update cucumber_factory

Upgrade parallel_tests:

bundle update parallel_tests

Even on the latest version, parallel_tests will print some deprecation warnings due to using an older formatter A...

With ActiveSupport you can say:

class Robot
  def self.likes_humans?
    'Nope.'
  end

  delegate :likes_humans?, to: :class
end

Robot.likes_humans?
# => 'Nope.'

Robot.new.likes_humans?
# => 'Nope.'

See the attached link for a list of icons in Font Awesome 4.

Icon names work differently in Font Awesome 5, where a name is only valid in combination with a name of the icon set.

We often use the Then console step from spreewald in combination with geordi vnc from geordi to debug tests within a real browser. Sometimes when you type in the browser it suddenly disappears. You will only see a grey screen then.

This will always happen if you press the d key. Press the d key again and the browser will appear again.

This is a problem when using Selenium with Firefox. We recommend using ChromeDriver for your Selenium tests.

Firefox will not trigger focus/blur events when its window is not focused. While this makes sense in standard usage, it breaks in parallel test execution.

Please do not rely on focus events in your tests. The linked card has an example of how to build passing tests that deal with focus/blur events.

In Spreewald 1.10.4+, nested patiently blocks are now patient.

Here is an example:

patiently do
  outer_code
  patiently do
    inner_code
  end
end

On spreewald 1.11.2+ the inner block will wait for the full configured wait time (by default 5 seconds). The outer patiently block would now be out of time, but it will always be retried at least a second time. This behavior allows with_scope to be patient, and it must be patient, as explained below.

In versions 1.10.4 - 1.11.1, inner blocks would keep giving the ou...

Your default postgres user is named like your linux user. That default user has limited access privileges, which can cause issues such as:

• DatabaseCleaner needs to disable foreign key constraints before it can wipe the database.
• Importing a remote dump with geordi
• Asking Postgres to show the storage path of a database

Doing these things without a superuser will show a Postgres error or (in Ruby) raise PG::InsufficientPrivilege.

To do so, the application's PostgreSQL user must be a superuser. ...

Trying to open a vnc window with geordi geordi vnc ended up with this error:

> VNC viewer could not be opened:
vncviewer: ConnectToTcpAddr: connect: Connection refused

Check if vncserver 17 (default geordi session) is running:

ps -aux|grep vnc

If you see Xvnc4 :17 then the server is already running. Kill this server if it is already running.

vncserver -kill :17

Als...

mysql> SELECT @@global.version;
+------------------+
| @@global.version |
+------------------+
| 5.6.30           |
+------------------+
1 row in set (0,00 sec)

MySQL 5.6 Reference Manual says "BLOB and TEXT columns cannot have DEFAULT values".

If you want to run migrations in development here are two variants which might help. If you are not sure about the side effects (e.g. your application is broken when it doesn't set additional default values on application side, too...

Use bundler > 1.15 to fix Gem::LOADED_SPECS_MUTEX (NameError).

Given the following project:

ruby -v
ruby 1.8.7

bundler -v
Bundler version 1.13.7

gem -v
1.8.30

rails -v
Rails 3.2.22.1

Running specs or features resulted in:

uninitialized constant Gem::LOADED_SPECS_MUTEX (NameError)

The previous settings described in Maximum version of Rubygems and Bundler for Ruby 1.8.7 and Rails 2.3 (even the rails version was rails 3.2 and not 2.3) seems not to work here, so I used (also described in the ca...

When your Rails controller calls render, you can pass a :status option for the HTTP status code:

render 'results', status: 400

All important status codes also have a symbol alias, which makes your code easier to read:

render 'results', status: :bad_request

Attached is a list of available symbol values for :status.

Here is how to use Chromedriver without libraries like selenium-webdriver. This can be useful for debugging.

The following example visits a web page and reads the a headline's text contents.

1. Create a session:

   curl -XPOST http://localhost:9515/session -d '{"desiredCapabilities":{"browserName":"chrome"}}'
   

   You will get a JSON response containing lots of information about your Chrome session, including a sessionId. Use this to send any future commands to your chromedriver session.

   {"sessionId":...
   

If you're on Ruby 2.3+ there's a <<~ operator to automatically unindent HEREDOCs:

str = <<~MESSAGE
  Hello Universe!
  This is me.
             Bye!
MESSAGE

If you have an older Ruby, you can use the String#strip_heredoc method from ActiveSupport. See Summarizing heredoc in ruby and rails for an example.

Technically...