Remove Dragonfly and fix up specs

Gemfile

@@ -7,7 +7,6 @@ gem "dotenv-rails", groups: %i[development test]
 gem "rails", "5.2.1"
 
 gem "delayed_job_active_record"
-gem "dragonfly"
 gem "http"
 gem "mini_magick"
 gem "omniauth-github"

Gemfile.lock

@@ -82,10 +82,6 @@ GEM
     dotenv-rails (2.5.0)
       dotenv (= 2.5.0)
       railties (>= 3.2, < 6.0)
-    dragonfly (1.1.5)
-      addressable (~> 2.3)
-      multi_json (~> 1.0)
-      rack (>= 1.3)
     erubi (1.7.1)
     execjs (2.7.0)
     faraday (0.12.2)
@@ -267,7 +263,6 @@ DEPENDENCIES
   capybara
   delayed_job_active_record
   dotenv-rails
-  dragonfly
   geckodriver-helper
   http
   launchy

README.md

@@ -2,7 +2,7 @@
 
 [ ![Codeship Status for danbee/my-images](https://app.codeship.com/projects/cf564ea0-7cbe-0136-47c4-2ebac98daaef/status?branch=master)](https://app.codeship.com/projects/300990)
 
-A simple DragonFly powered image storage application.
+A simple Active Storage powered image storage application.
 
 ![](https://user-images.githubusercontent.com/165531/43842691-e38186be-9af3-11e8-9387-d1ee206cca2e.png)
 

app/jobs/tag_image_job.rb

@@ -4,7 +4,7 @@ class TagImageJob < ApplicationJob
   def perform(image_id:)
     image = Image.find(image_id)
 
-    tags = Clarifai.new(image.image.file.path).tags
+    tags = Clarifai.new(image.image.download).tags
     image.update_attributes(tags: tags)
   end
 end

app/models/image.rb

@@ -1,8 +1,7 @@
 class Image < ActiveRecord::Base
-  dragonfly_accessor :df_image
   has_one_attached :image
 
-  validates :image, presence: true
+  validates :image, attached: true
 
   belongs_to :user
 end

app/models/user.rb

@@ -1,6 +1,4 @@
 class User < ActiveRecord::Base
-  dragonfly_accessor :avatar
-
   has_many :images
 
   def self.find_or_create_from_auth(auth)
@@ -13,7 +11,6 @@ class User < ActiveRecord::Base
       uid: auth.uid,
       username: auth.info.nickname,
       name: auth.info.name,
-      avatar_url: auth.info.image,
     )
   end
 end

app/validators/attached_validator.rb

@@ -0,0 +1,7 @@
+class AttachedValidator < ActiveModel::EachValidator
+  def validate_each(record, attribute, value)
+    if !value.attached?
+      record.errors.add(attribute, :attached, options)
+    end
+  end
+end

config/initializers/dragonfly.rb

@@ -1,27 +0,0 @@
-require "dragonfly"
-
-# Configure
-Dragonfly.app.configure do
-  plugin :imagemagick
-
-  verify_urls true
-  secret "0da375f9754c75707f2a3b4e0c75dffb7ec7d6bb1a4a77e8a8dcfba9037bebce"
-
-  url_format "/media/:job/:name"
-
-  datastore :file,
-    root_path: Rails.root.join("public/system/dragonfly", Rails.env),
-    server_root: Rails.root.join("public")
-end
-
-# Logger
-Dragonfly.logger = Rails.logger
-
-# Mount as middleware
-Rails.application.middleware.use Dragonfly::Middleware
-
-# Add model functionality
-if defined?(ActiveRecord::Base)
-  ActiveRecord::Base.extend Dragonfly::Model
-  ActiveRecord::Base.extend Dragonfly::Model::Validations
-end

config/locales/en.yml

@@ -21,3 +21,8 @@
 
 en:
   hello: "Hello world"
+
+  activerecord:
+    errors:
+      messages:
+        attached: is not attached

lib/clarifai.rb

@@ -6,8 +6,8 @@ class Clarifai
   API_URL = "https://api.clarifai.com/v2/models/" \
             "aaa03c23b3724a16a56b629203edc62c/outputs".freeze
 
-  def initialize(image_path)
-    @image_path = image_path
+  def initialize(image_data)
+    @image_data = image_data
   end
 
   def tags
@@ -16,6 +16,8 @@ class Clarifai
 
   private
 
+  attr_reader :image_data
+
   def extract_tags(response_hash)
     response_hash["outputs"][0]["data"]["concepts"].map do |concept|
       concept["name"]
@@ -40,10 +42,6 @@ class Clarifai
   end
 
   def image_base64
-    Base64.encode64(image_file)
-  end
-
-  def image_file
-    File.read(@image_path)
+    Base64.encode64(image_data)
   end
 end

spec/features/user_manages_image_spec.rb

@@ -15,10 +15,14 @@ feature "user manages images" do
 
   it "deletes the image" do
     user = User.create(uid: "1")
-    Image.create(
+    image = Image.new(
       user: user,
-      image: File.new("#{Rails.root}/spec/fixtures/spectrum.jpg"),
     )
+    image.image.attach(
+      io: File.open("#{Rails.root}/spec/fixtures/spectrum.jpg"),
+      filename: "spectrum.jpg",
+    )
+    image.save
 
     sign_in(user)
     click_on("Delete")

spec/features/user_manages_image_tags_spec.rb

@@ -4,11 +4,15 @@ feature "user manages image tags by visitng images show page" do
   scenario "and can see an X to link for deletion on a tag" do
     tags = ["one", "two"]
     user = User.create(uid: "123")
-    Image.create(
+    image = Image.new(
       user: user,
       tags: tags,
-      image: File.new("#{Rails.root}/spec/fixtures/spectrum.jpg"),
     )
+    image.image.attach(
+      io: File.open("#{Rails.root}/spec/fixtures/spectrum.jpg"),
+      filename: "spectrum.jpg",
+    )
+    image.save
 
     sign_in(user)
     page.find(".image").click
@@ -21,11 +25,15 @@ feature "user manages image tags by visitng images show page" do
   scenario "and can click the link to delete a tag", js: true do
     tags = ["one", "two"]
     user = User.create(uid: "123")
-    Image.create(
+    image = Image.new(
       user: user,
       tags: tags,
-      image: File.new("#{Rails.root}/spec/fixtures/spectrum.jpg"),
     )
+    image.image.attach(
+      io: File.open("#{Rails.root}/spec/fixtures/spectrum.jpg"),
+      filename: "spectrum.jpg",
+    )
+    image.save
 
     sign_in(user)
     page.find(".image").click
@@ -41,11 +49,15 @@ feature "user manages image tags by visitng images show page" do
     tags = ["one", "two"]
     user = User.create(uid: "123")
     new_tag = "newtag"
-    Image.create(
+    image = Image.new(
       user: user,
       tags: tags,
-      image: File.new("#{Rails.root}/spec/fixtures/spectrum.jpg"),
     )
+    image.image.attach(
+      io: File.open("#{Rails.root}/spec/fixtures/spectrum.jpg"),
+      filename: "spectrum.jpg",
+    )
+    image.save
 
     sign_in(user)
     page.find(".image").click

spec/jobs/tag_image_job_spec.rb

@@ -4,9 +4,12 @@ describe TagImageJob, type: :job do
   describe ".perform" do
     it "tags an image" do
       stub_clarifai(%w[computers technology])
-      image = Image.create(
-        image: "#{Rails.root}/spec/fixtures/spectrum.jpg",
+      image = Image.new
+      image.image.attach(
+        io: File.open("#{Rails.root}/spec/fixtures/spectrum.jpg"),
+        filename: "spectrum.jpg",
       )
+      image.save
 
       TagImageJob.perform_now(image_id: image.id)
       image.reload

spec/lib/clarifai_spec.rb

@@ -11,7 +11,7 @@ describe Clarifai do
     it "predicts tags for our image" do
       stub_api(%w[computer technology])
 
-      clarifai = Clarifai.new("spec/fixtures/spectrum.jpg")
+      clarifai = Clarifai.new(File.read("spec/fixtures/spectrum.jpg"))
 
       expect(clarifai.tags).to eq(%w[computer technology])
     end

spec/models/image_spec.rb

@@ -1,11 +1,7 @@
 require "rails_helper"
 
 describe Image do
-  it { is_expected.to validate_presence_of(:image) }
   it { is_expected.to belong_to(:user) }
-
-  it "should not be valid without an image" do
-    image = Image.new
-    expect(image).not_to be_valid
-  end
+  it { is_expected.to have_attached_file(:image) }
+  it { is_expected.to validate_attachment_of(:image) }
 end

spec/support/matchers/have_attached_file.rb

@@ -0,0 +1,7 @@
+RSpec::Matchers.define :have_attached_file do |name|
+  match do |record|
+    file = record.send(name)
+
+    file.respond_to?(:attach)
+  end
+end

spec/support/matchers/validate_attachment_of.rb

@@ -0,0 +1,45 @@
+require "rspec/expectations"
+
+RSpec::Matchers.define :validate_attachment_of do |attr_name|
+  match do |record|
+    matcher.matches?(record, attr_name)
+  end
+
+  chain :on do |validation_context|
+    matcher.on(validation_context)
+  end
+
+  chain :with_message do |message|
+    matcher.with_message(message)
+  end
+
+  private
+
+  def matcher
+    @matcher ||= ValidateAttachmentOfMatcher.new
+  end
+
+  class ValidateAttachmentOfMatcher
+    def on(validation_context)
+      @validation_context = validation_context
+    end
+
+    def with_message(message)
+      @message = message
+    end
+
+    def matches?(record, attr_name)
+      record.send(attr_name).purge
+      record.valid?(validation_context)
+      record.errors[attr_name].include? message
+    end
+
+    private
+
+    attr_reader :validation_context
+
+    def message
+      @message || I18n.translate("activerecord.errors.messages.attached")
+    end
+  end
+end