kinopyo

Check whether a Paperclip attachment exists

Don’t simply test for the presence of the magic Paperclip attribute, it will return a paperclip Attachment object and thus always be true:

- if user.photo.present? # always true
  = image_tag(user.photo.url)

kinopyo

# http://rspec.rubyforge.org/rspec/1.3.0/classes/Spec/Matchers.html#M000183
lambda { do_something_risky }.should raise_exception
lambda { do_something_risky }.should raise_exception(PoorRiskDecisionError)
lambda { do_something_risky }.should raise_exception(PoorRiskDecisionError) { |exception| exception.data.should == 42 }
lambda { do_something_risky }.should raise_exception(PoorRiskDecisionError, "that was too risky")
lambda { do_something_risky }.should raise_exception(PoorRiskDecisionError, /oo ri/)

lambda { do_something_risky }.should_not raise_exception
lambda { do_something_risky }.should_not raise_exception(PoorRiskDecisionError)
lambda { do_something_risky }.should_not raise_exception(PoorRiskDecisionError, "that was too risky")

kinopyo

# from https://github.com/ruby-china/ruby-china/blob/master/app/helpers/application_helper.rb

MOBILE_USER_AGENTS =  'palm|blackberry|nokia|phone|midp|mobi|symbian|chtml|ericsson|minimo|' +
                    'audiovox|motorola|samsung|telit|upg1|windows ce|ucweb|astel|plucker|' +
                    'x320|x240|j2me|sgh|portable|sprint|docomo|kddi|softbank|android|mmp|' +
                    'pdxgw|netfront|xiino|vodafone|portalmmm|sagem|mot-|sie-|ipod|up\\.b|' +
                    'webos|amoi|novarra|cdm|alcatel|pocket|iphone|mobileexplorer|mobile'
def mobile?
agent_str = request.user_agent.to_s.downcase
return false if agent_str =~ /ipad/

kinopyo

RSpec.configure do |config|
  # ...
end

# quick hack to get Rack to be quiet about "warning: regexp match /.../n against to UTF-8 string" until we upgrade to Rails 3.1 with Rack 1.3
module Rack
  module Utils
    def escape(s)
      CGI.escape(s.to_s)

kinopyo

  it "finds upcoming published lessons" do
    upcoming1 = Factory :lesson, start_at: 1.day.from_now
    upcoming2 = Factory :lesson, start_at: 2.days.from_now
    past = Factory :lesson, start_at: 1.day.ago
    draft = Factory :lesson, visibility: 'draft'
    Lesson.upcoming.should include(upcoming1, upcoming2)
    Lesson.upcoming.should_not include(past, draft)
  end

kinopyo

f = Nokogiri::XML.fragment(some_html_str)

f.search('.//img').remove
puts f.to_html

kinopyo

form html: { multipart: true } do |f|
  f.inputs "Basic Info" do
    # ...
    f.input :photo, as: :file
  end
  f.buttons
end

kinopyo

# in gemfile i have these lines
gem 'sitemap_generator', '2.0.1.pre1'
gem 'carrierwave'
gem 'fog'

kinopyo

# Say you have two columns: start_at, end_at
# When start_at is defined, you want end_at's value based on the start_at
# Here is the solution, passing a block to get the object of the context.

start_at Random.new.rand(14..45).days.from_now
end_at { |l| l.start_at + 2.hours }

# Full example
FactoryGirl.define do
  factory :lesson do

kinopyo

# check all your ENV vars.
heroku config -long
     
# add ENV vars
heroku config:add S3_KEY=8N029N81 S3_SECRET=9s83109d3+583493190