Geoyi

How to install virtualenv:

Install pip first

sudo apt-get install python3-pip

Then install virtualenv using pip3

sudo pip3 install virtualenv 

longlostnick

class Api::UploadsController < ApiController

  def create
    @upload = Upload.new(upload_params)
  ensure
    clean_tempfile
  end

  private

shrikanthkr

In the controller action

image_file = change_img_params(params[:avatar]) #params[:avatar] - base64 string

def change_img_params(img)
begin
  Base64.decode64(img) #To check if thats a base64 string
  if img
    img = file_decode(img.split(',')[1],"some file name") #getting only the string leaving out the data/<format>

end

lulalala

class Banner < ActiveRecord::Base
  attr_accessor :image_width, :image_height
  mount_uploader :image, ImageUploader
  
  validate :check_dimensions, :on => :create
  def check_dimensions
    if !image_cache.nil? && (image.width < 300 || image.height < 300)
      errors.add :image, "Dimension too small."
    end
  end

leemour

# Railscast
http://railscasts.com/episodes/308-oh-my-zsh

# Install Zsh
sudo apt-get update && sudo apt-get install zsh 

# Install Oh-my-zsh
wget –no-check-certificate https://github.com/robbyrussell/oh-my-zsh/raw/master/tools/install.sh -O – | sh 

# Make ZSH default shell

marcusmalmberg

CarrierWave home

https://github.com/jnicklas/carrierwave

This example will create an uploader that will upload a file stored in a model Model. The file will be stored locally in development and test environment and will use Amazon S3 in production.

CarrierWave installation

First add the gems.

dergachev

Vagrant Setup

This tutorial guides you through creating your first Vagrant project.

We start with a generic Ubuntu VM, and use the Chef provisioning tool to:

• install packages for vim, git
• create user accounts, as specified in included JSON config files
• install specified user dotfiles (.bashrc, .vimrc, etc) from a git repository

Afterwards, we'll see how easy it is to package our newly provisioned VM

kirs

# encoding: utf-8

class AvatarUploader < CarrierWave::Uploader::Base

  include CarrierWave::MiniMagick

  # Choose what kind of storage to use for this uploader:
  storage :file

  # Override the directory where uploaded files will be stored.