New task: list attachments

Author: blocknotes

lib/tasks/active_storage_db_tasks.rake

@@ -1,5 +1,12 @@
 # frozen_string_literal: true
 
-# desc 'ActiveStorageDB sync'
-# task :active_storage_db do
-# end
+namespace :asdb do
+  desc 'ActiveStorageDB: list attachments'
+  task ls: [:environment] do |_t, _args|
+    ::ActiveStorage::Blob.order(:filename).pluck(:byte_size, :created_at, :filename).each do |size, dt, filename|
+      size_k = (size / 1024).to_s.rjust(7)
+      date = dt.strftime('%Y-%m-%d %H:%M')
+      puts "#{size_k}K  #{date}  #{filename}"
+    end
+  end
+end

spec/factories/active_storage_blob_factory.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :active_storage_blob, class: 'ActiveStorage::Blob' do
+    sequence(:filename) { |n| "file_#{n}" }
+    byte_size { 1234 }
+    checksum { 'some_checksum' }
+    created_at { Time.now }
+  end
+end

spec/support/shared_contexts/rake_context.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+shared_context 'rake context' do
+  Rails.application.load_tasks
+
+  def execute_task(task, args = nil)
+    with_captured_stdout do
+      Rake::Task[task].execute(args)
+    end
+  end
+
+  def with_captured_stderr
+    original_stderr = $stderr
+    $stderr = StringIO.new
+    yield
+    $stderr.string
+  ensure
+    $stderr = original_stderr
+  end
+
+  def with_captured_stdout
+    original_stdout = $stdout
+    $stdout = StringIO.new
+    yield
+    $stdout.string
+  ensure
+    $stdout = original_stdout
+  end
+end

spec/tasks/active_storage_db_tasks_spec.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+RSpec.describe 'active_storage_db_tasks' do
+  include_context 'rake context'
+
+  describe 'asdb:ls' do
+    subject(:task) { execute_task('asdb:ls') }
+
+    let(:file1) { create(:active_storage_blob, filename: 'file1', created_at: Time.now - 1.hour) }
+    let(:file2) { create(:active_storage_blob, filename: 'file2', created_at: Time.now - 5.hour) }
+    let(:file3) { create(:active_storage_blob, filename: 'file3', created_at: Time.now - 3.hour) }
+
+    before do
+      [file1, file2, file3]
+    end
+
+    it { is_expected.to match /file1.+file2.+file3/m }
+
+    it 'prints the list of 3 files' do
+      expect(task.split("\n").size).to be 3
+    end
+  end
+end