Add job for tagging images

app/jobs/application_job.rb

@@ -0,0 +1,8 @@
+class ApplicationJob < ActiveJob::Base
+  # Automatically retry jobs that encountered a deadlock
+  # retry_on ActiveRecord::Deadlocked
+
+  # Most jobs are safe to ignore if the underlying records
+  # are no longer available
+  # discard_on ActiveJob::DeserializationError
+end

app/jobs/tag_image_job.rb

@@ -0,0 +1,10 @@
+class TagImageJob < ApplicationJob
+  queue_as :default
+
+  def perform(image_id:)
+    image = Image.find(image_id)
+
+    tags = Clarifai.new(image.image.file.path).tags
+    image.update_attributes(tags: tags)
+  end
+end

db/migrate/20180825150330_add_tags_to_images.rb

@@ -0,0 +1,5 @@
+class AddTagsToImages < ActiveRecord::Migration[5.2]
+  def change
+    add_column :images, :tags, :string, array: true, default: []
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2014_03_24_170840) do
+ActiveRecord::Schema.define(version: 2018_08_25_150330) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -21,6 +21,7 @@ ActiveRecord::Schema.define(version: 2014_03_24_170840) do
     t.string "image_name"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.string "tags", default: [], array: true
   end
 
   create_table "users", force: :cascade do |t|

spec/jobs/tag_image_job_spec.rb

@@ -0,0 +1,17 @@
+require "rails_helper"
+
+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",
+      )
+
+      TagImageJob.perform_now(image_id: image.id)
+      image.reload
+
+      expect(image.tags).to eq(%w[computers technology])
+    end
+  end
+end

spec/rails_helper.rb

@@ -65,6 +65,7 @@ RSpec.configure do |config|
   # config.filter_gems_from_backtrace("gem name")
 
   config.include AuthHelpers, type: :feature
+  config.include ClarifaiHelpers, type: :job
 end
 
 Shoulda::Matchers.configure do |config|