yannvery

[Ruby On Rails 4] How to validate a date field named with the format dd/mm/yyyy with Mongoid

In Ruby On Rails 4 it seems impossible to add a validation on a datefield with a text format.

Example in rails 3:

Class Task
...

validates :start, presence: true, format: /\d{2}\/\d{2}\/\d{4}/

yannvery

Proc & Lambdas

1 - Proc

Creation

Un objet proc permet de stocker du code et peut être associé à une variable.

my_proc = Proc.new { puts "Hello" }

yannvery

How to maintain fork sync

Configuring a remote for a fork

To sync changes you make in a fork with the original repository, you must configure a remote that points to the upstream repository in Git.

• Open a Terminal
• List current configured remote repository for your fork

git remote -v
origin https://github.com/YOUR_USERNAME/YOUR_FORK.git (fetch)

yannvery

Ubuntu - Purge old kernels and unused modules

Purge old kernels

Open terminal and check your current kernel:

uname -r

DO NOT REMOVE THIS KERNEL!

yannvery

All mails received by a user are stored into: /var/mail/username

Open mailbox without initial display: mail -N
Then delete all mails: d *

yannvery

Create a user and add privileges to access database remotly :

CREATE USER 'application'@'localhost' IDENTIFIED BY 'password';
GRANT ALL PRIVILEGES ON application_database.* TO 'application'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;

yannvery

PRY

gem install pry

Additionals gems

• pry-rescue
• pry-stack_explorer
• pry-clipboard

yannvery

To delete downloaded packages (.deb) already installed (and no longer needed)
sudo apt-get clean

To remove all stored archives in your cache for packages that can not be downloaded anymore (thus packages that are no longer in the repository or that have a newer version in the repository).
sudo apt-get autoclean

To remove unnecessary packages (After uninstalling an app there could be packages you don't need anymore)
sudo apt-get autoremove

To delete old kernel versions

yannvery

Faye & Rails 4

This gist describes how to implement faye with a rails 4 application.

What I want ?

A user receives a live notification when another user login.

Requirements

A rails 4 application with devise for user management

2 gems:

yannvery

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To claim this, I am signing this object: