Code example for `paperclip-location`

20140110012324_create_places.rb

require 'paperclip'

class CreatePlaces < ActiveRecord::Migration
  include Paperclip::Schema

  def self.up
    create_table :places do |t|
      t.boolean :location_locked, default: false, null: false

      t.decimal :lat, precision: 10, scale: 15
      t.decimal :lng, precision: 10, scale: 15
    end

    add_attachment :places, :photo
  end
end

database.yml

development:
  adapter: sqlite3
  database: development.sqlite3
  pool: 5
  timeout: 5000

development.sqlite3

Gemfile

source 'https://rubygems.org'

ruby '2.0.0'

gem 'activerecord'
gem 'paperclip-location'
gem 'sqlite3'

Gemfile.lock

GEM
  remote: https://rubygems.org/
  specs:
    activemodel (4.0.2)
      activesupport (= 4.0.2)
      builder (~> 3.1.0)
    activerecord (4.0.2)
      activemodel (= 4.0.2)
      activerecord-deprecated_finders (~> 1.0.2)
      activesupport (= 4.0.2)
      arel (~> 4.0.0)
    activerecord-deprecated_finders (1.0.3)
    activesupport (4.0.2)
      i18n (~> 0.6, >= 0.6.4)
      minitest (~> 4.2)
      multi_json (~> 1.3)
      thread_safe (~> 0.1)
      tzinfo (~> 0.3.37)
    arel (4.0.1)
    atomic (1.1.14)
    builder (3.1.4)
    climate_control (0.0.3)
      activesupport (>= 3.0)
    cocaine (0.5.3)
      climate_control (>= 0.0.3, < 1.0)
    exifr (1.1.3)
    i18n (0.6.9)
    mime-types (2.0)
    minitest (4.7.5)
    multi_json (1.8.2)
    paperclip (3.5.2)
      activemodel (>= 3.0.0)
      activesupport (>= 3.0.0)
      cocaine (~> 0.5.3)
      mime-types
    paperclip-location (0.0.5)
      exifr (~> 1.1)
      paperclip (~> 3.5)
    sqlite3 (1.3.8)
    thread_safe (0.1.3)
      atomic
    tzinfo (0.3.38)

PLATFORMS
  ruby

DEPENDENCIES
  activerecord
  paperclip-location
  sqlite3

location

#!/usr/bin/env ruby
#
# Scrape the location from a JPG file

require "active_record"
require "paperclip/location"
require "./place"

Paperclip::Location::Processor.register! :location

unless image_file = ARGV.pop
  raise ArgumentError, "Don't forget to pass in the path to the image"
end

ActiveRecord::Base.establish_connection YAML.load_file("database.yml")["development"]

puts "Processing #{image_file}....."
puts
puts "-------"
puts

place = Place.new photo: File.open(image_file)

puts
puts "-------"
puts
puts "Processed file."
puts "------- latitude: #{place.lat}"
puts "------- longitude: #{place.lng}"

place.rb

class Place < ActiveRecord::Base
  include Paperclip::Glue

  has_attached_file :photo, styles: { large: '600x600#' },
                    processors: [:thumbnail, :location]
end

Rakefile

require 'bundler/setup'

require 'active_record'

include ActiveRecord::Tasks

DatabaseTasks.env = 'development'
DatabaseTasks.db_dir = '.'
DatabaseTasks.database_configuration = YAML.load(File.read('database.yml'))
DatabaseTasks.migrations_paths = 'migrate'

task :environment do
  ActiveRecord::Base.configurations = DatabaseTasks.database_configuration
  ActiveRecord::Base.establish_connection DatabaseTasks.env
end

load 'active_record/railties/databases.rake'

schema.rb

# encoding: UTF-8
# This file is auto-generated from the current state of the database. Instead
# of editing this file, please use the migrations feature of Active Record to
# incrementally modify your database, and then regenerate this schema definition.
#
# Note that this schema.rb definition is the authoritative source for your
# database schema. If you need to create the application database on another
# system, you should be using db:schema:load, not running all the migrations
# from scratch. The latter is a flawed and unsustainable approach (the more migrations
# you'll amass, the slower it'll run and the greater likelihood for issues).
#
# It's strongly recommended that you check this file into your version control system.

ActiveRecord::Schema.define(version: 20140110012324) do
  create_table "places", force: true do |t|
    t.boolean  "location_locked",                              default: false, null: false
    t.decimal  "lat",                precision: 10, scale: 15
    t.decimal  "lng",                precision: 10, scale: 15
    t.string   "photo_file_name"
    t.string   "photo_content_type"
    t.integer  "photo_file_size"
    t.datetime "photo_updated_at"
  end
end