Extract attachment options to class level

lib/paperclip.rb

@@ -216,7 +216,8 @@ module Paperclip
       include InstanceMethods
 
       self.attachment_definitions = self.attachment_definitions&.dup || {}
-      attachment_definitions[name] = {:validations => []}.merge(options)
+      attachment_definitions[name] = Attachment.build_class(name, options)
+      const_set("#{name}_attachment".camelize, attachment_definitions[name])
 
       after_save :save_attached_files
       after_commit :destroy_attached_files, on: :destroy
@@ -291,7 +292,7 @@ module Paperclip
     end
 
     def _add_attachment_validation(name, type, default_options, options)
-      attachment_definitions[name][:validations] << [
+      attachment_definitions[name].validations << [
         type,
         **options,
         **default_options.slice(:message, :if, :unless)
@@ -302,7 +303,7 @@ module Paperclip
   module InstanceMethods #:nodoc:
     def attachment_for name
       @_paperclip_attachments ||= {}
-      @_paperclip_attachments[name] ||= Attachment.build(name, self, self.class.attachment_definitions[name])
+      @_paperclip_attachments[name] ||= self.class.attachment_definitions[name].new(self)
     end
 
     def each_attachment

lib/paperclip/attachment.rb

@@ -19,7 +19,6 @@ module Paperclip
         :styles        => {},
         :default_url   => "/:attachment/:style/missing.png",
         :default_style => :original,
-        :validations   => [],
         :storage       => :filesystem,
         :whiny         => true,
         :restricted_characters  => /[^\w\p{Word}\d\.\-]|(^\.{0,2}$)+/,
@@ -27,53 +26,57 @@ module Paperclip
       }
     end
 
-    def self.attachment_class_cache
-      @attachment_class_cache ||= Hash.new do |hash, storage|
-        storage_name = storage.to_s.downcase.camelize
-        unless Storage.const_defined?(storage_name, false)
-          raise "Cannot load storage module '#{storage_name}'"
+    class << self
+      # Every attachment definition creates separate class which stores configuration.
+      # This class is instantiated later with model instance.
+      def build_class(name, options)
+        options = default_options.merge(options)
+        storage_name = options.fetch(:storage).to_s.downcase.camelize
+        storage_module = Storage.const_get(storage_name, false)
+        Class.new(self) do
+          include storage_module
+          setup(name, options)
         end
-        hash[storage] =
-          if storage_name == storage
-            storage_module = Storage.const_get(storage_name)
-            Class.new(self) { include(storage_module) }.tap { |x| const_set(storage_name, x) }
-          else
-            hash[storage_name]
-          end
       end
+
+      # Basic attrs
+      attr_reader :attachment_name, :options, :validations
+
+      # Extracted from options
+      attr_reader :url_template, :path_template, :default_url, :processing_url, :styles, :default_style, :whiny
+
+      def setup(name, options)
+        @attachment_name  = name
+        @options          = options
+        @validations      = []
+        @url_template     = options[:url]
+        @path_template    = options[:path]
+        @default_url      = options[:default_url]
+        @processing_url   = options[:processing_url] || default_url
+        @styles           = StylesParser.new(options).styles
+        @default_style    = options[:default_style]
+        @whiny            = options[:whiny_thumbnails] || options[:whiny]
+      end
+
+      # For delayed_paperclip
+      delegate :[], :[]=, to: :options
     end
 
-    def self.build(name, instance, options = {})
-      storage = options[:storage] || default_options[:storage]
-      attachment_class_cache[storage].new(name, instance, options)
-    end
+    delegate :options, :styles, :default_style, to: :class
 
-    attr_reader :name, :instance, :options, :url_template, :path_template,
-      :styles, :default_style, :default_url, :validations, :whiny
+    attr_reader :instance
 
     attr_accessor :post_processing
 
     # Creates an Attachment object. +name+ is the name of the attachment,
-    # +instance+ is the ActiveRecord object instance it's attached to, and
-    # +options+ is the same as the hash passed to +has_attached_file+.
-    def initialize name, instance, options = {}
-      @name              = name
-      @instance          = instance
+    # +instance+ is the ActiveRecord object instance it's attached to.
+    def initialize(instance)
+      @instance = instance
+      @post_processing = true
+    end
 
-      options = Attachment.default_options.merge(options)
-
-      @url_template      = options[:url]
-      @path_template     = options[:path]
-      @styles            = StylesParser.new(options).styles
-      @default_url       = options[:default_url]
-      @validations       = options[:validations]
-      @default_style     = options[:default_style]
-      @storage           = options[:storage]
-      @whiny             = options[:whiny_thumbnails] || options[:whiny]
-      @options           = options
-
-      @post_processing   = true
-      @processing_url    = options[:processing_url] || default_url
+    def name
+      self.class.attachment_name
     end
 
     def queued_for_delete
@@ -120,11 +123,9 @@ module Paperclip
 
       queued_for_write[:original] = to_tempfile(uploaded_file)
 
-      file_name = if options[:filename_sanitizer]
-        options[:filename_sanitizer].call uploaded_file.original_filename, self
-      else
-        sanitize_filename uploaded_file.original_filename
-      end
+      file_name = uploaded_file.original_filename
+      sanitizer = self.class.options[:filename_sanitizer]
+      file_name = sanitizer ? sanitizer.call(file_name, self) : sanitize_filename(file_name)
 
       instance_write(:file_name,       file_name)
       instance_write(:content_type,    uploaded_file.content_type.to_s.strip)
@@ -164,17 +165,17 @@ module Paperclip
     # update time appended to the url
     def url style = default_style, include_updated_timestamp = true
       # for delayed_paperclip
-      return interpolate(processing_url, style) if instance.try("#{name}_processing?")
-      interpolate_url(url_template, style, include_updated_timestamp)
+      return interpolate(self.class.processing_url, style) if instance.try("#{name}_processing?")
+      interpolate_url(self.class.url_template, style, include_updated_timestamp)
     end
 
     # Метод необходим в ассетах
     def filesystem_url style = default_style, include_updated_timestamp = true
-      interpolate_url(url_template, style, include_updated_timestamp)
+      interpolate_url(self.class.url_template, style, include_updated_timestamp)
     end
 
     def interpolate_url(template, style, include_updated_timestamp)
-      url = original_filename.nil? ? interpolate(default_url, style) : interpolate(template, style)
+      url = original_filename.nil? ? interpolate(self.class.default_url, style) : interpolate(template, style)
       include_updated_timestamp && updated_at ? [url, updated_at].compact.join(url.include?("?") ? "&" : "?") : url
     end
 
@@ -184,7 +185,7 @@ module Paperclip
     # URL, and the :bucket option refers to the S3 bucket.
     def path style = default_style
       return if original_filename.nil?
-      interpolate(path_template, style)
+      interpolate(self.class.path_template, style)
     end
 
     alias_method :filesystem_path, :path
@@ -268,7 +269,9 @@ module Paperclip
 
     def sanitize_filename(file_name)
       file_name = file_name.strip
-      file_name.gsub!(options[:restricted_characters], '_') if options[:restricted_characters]
+
+      restricted_characters = self.class.options[:restricted_characters]
+      file_name.gsub!(restricted_characters, '_') if restricted_characters
 
       # Укорачиваем слишком длинные имена файлов.
       if file_name.length > MAX_FILE_NAME_LENGTH
@@ -342,7 +345,7 @@ module Paperclip
 
     def validate #:nodoc:
       return if @validated
-      validations.each do |validation|
+      self.class.validations.each do |validation|
         name, options = validation
         error = send(:"validate_#{name}", options) if allow_validation?(options)
         errors[name] = error if error
@@ -404,7 +407,7 @@ module Paperclip
           end
         rescue PaperclipError => e
           log("An error was received while processing: #{e.inspect}")
-          (errors[:processing] ||= []) << e.message if whiny
+          (errors[:processing] ||= []) << e.message if self.class.whiny
         end
       end
     end

lib/paperclip/interpolations.rb

@@ -47,7 +47,7 @@ module Paperclip
     # So it just interpolates :url template without checking if preocessing and
     # file existence.
     def url attachment, style_name
-      interpolate(attachment.options[:url], attachment, style_name)
+      interpolate(attachment.class.url_template, attachment, style_name)
     end
 
     # Returns the timestamp as defined by the <attachment>_updated_at field

lib/paperclip/storage/delayeds3.rb

@@ -1,16 +1,18 @@
+require "sidekiq"
+begin
+  require "aws-sdk-s3"
+rescue LoadError => e
+  e.message << " (You may need to install the aws-sdk-s3 gem)"
+  raise e
+end
+
 module Paperclip
   module Storage
     # Need to create boolean field synced_to_s3
     module Delayeds3
       class << self
-        def included(*)
-          require "sidekiq"
-          begin
-            require "aws-sdk-s3"
-          rescue LoadError => e
-            e.message << " (You may need to install the aws-sdk-s3 gem)"
-            raise e
-          end
+        def included(base)
+          base.extend(ClassMethods)
         end
 
         def parse_credentials creds
@@ -32,6 +34,47 @@ module Paperclip
         end
       end
 
+      module ClassMethods
+        attr_reader :s3_url_template, :s3_path_template,
+                    :filesystem_url_template, :filesystem_path_template,
+                    :s3_credentials, :s3_bucket,
+                    :fog_provider, :fog_credentials, :fog_directory,
+                    :synced_to_s3_field, :synced_to_fog_field
+
+        def setup(*)
+          super
+
+          @s3_url_template = options[:s3_url]
+          @s3_path_template = options[:s3_path]
+          @filesystem_url_template = options[:filesystem_url]
+          @filesystem_path_template = options[:filesystem_path]
+
+          @s3_credentials = Delayeds3.parse_credentials(options[:s3_credentials])
+          @s3_bucket = options[:bucket] || @s3_credentials[:bucket]
+
+          @fog_provider = options[:fog_provider]
+          @fog_directory = options[:fog_directory]
+          @fog_credentials = options[:fog_credentials].symbolize_keys
+
+          @synced_to_s3_field ||= :"#{attachment_name}_synced_to_s3"
+          @synced_to_fog_field ||= :"#{attachment_name}_synced_to_fog"
+        end
+
+        def fog_storage
+          @fog_storage ||= Fog::Storage.new(fog_credentials.merge(provider: fog_provider))
+        end
+
+        def aws_bucket
+          @aws_bucket ||= begin
+            params = s3_credentials.reject { |_k, v| v.blank? }
+            params[:region] ||= 'us-east-1'
+            s3_client = Aws::S3::Client.new(params)
+            s3_resource = Aws::S3::Resource.new(client: s3_client)
+            s3_resource.bucket(s3_bucket)
+          end
+        end
+      end
+
       class UploadWorker
         include ::Sidekiq::Worker
         sidekiq_options queue: :paperclip
@@ -69,40 +112,34 @@ module Paperclip
         end
       end
 
+      delegate :synced_to_s3_field, :synced_to_fog_field, to: :class
+
       def initialize(*)
         super
-
-        @s3_credentials = Delayeds3.parse_credentials(options[:s3_credentials])
-        @bucket         = options[:bucket]         || @s3_credentials[:bucket]
-
-        @fog_provider   = options[:fog_provider]
-        @fog_directory  = options[:fog_directory]
-        @fog_credentials = options[:fog_credentials]
-
-        @queued_jobs    = []
+        @queued_jobs = []
       end
 
       def url(style = default_style, include_updated_timestamp = true)
         # for delayed_paperclip
-        return interpolate(processing_url, style) if instance.try("#{name}_processing?")
-        template = instance_read(:synced_to_s3) ? options[:s3_url] : options[:filesystem_url]
+        return interpolate(self.class.processing_url, style) if instance.try("#{name}_processing?")
+        template = instance_read(:synced_to_s3) ? self.class.s3_url_template : self.class.filesystem_url_template
         interpolate_url(template, style, include_updated_timestamp)
       end
 
       # Метод необходим в ассетах
       def filesystem_url(style = default_style, include_updated_timestamp = true)
-        interpolate_url(options[:filesystem_url], style, include_updated_timestamp)
+        interpolate_url(self.class.filesystem_url_template, style, include_updated_timestamp)
       end
 
       def path(style = default_style)
         return if original_filename.nil?
-        path = instance_read(:synced_to_s3) ? options[:s3_path] : options[:filesystem_path]
+        path = instance_read(:synced_to_s3) ? self.class.s3_path_template : self.class.filesystem_path_template
         interpolate(path, style)
       end
 
       def filesystem_path(style = default_style)
         return if original_filename.nil?
-        interpolate(options[:filesystem_path], style)
+        interpolate(self.class.filesystem_path_template, style)
       end
 
       def reprocess!
@@ -110,34 +147,6 @@ module Paperclip
         flush_jobs
       end
 
-      def aws_bucket
-        return @aws_bucket if @aws_bucket
-
-        params = { region: @s3_credentials[:region] || 'us-east-1',
-                   access_key_id: @s3_credentials[:access_key_id],
-                   secret_access_key: @s3_credentials[:secret_access_key] }
-
-        params[:endpoint] = @s3_credentials[:endpoint] if @s3_credentials[:endpoint].present?
-        params[:http_proxy] = @s3_credentials[:http_proxy] if @s3_credentials[:http_proxy].present?
-
-        s3_client = Aws::S3::Client.new(params)
-
-        s3_resource = Aws::S3::Resource.new(client: s3_client)
-        @aws_bucket = s3_resource.bucket(bucket_name)
-      end
-
-      def bucket_name
-        @bucket
-      end
-
-      def synced_to_s3_field
-        @synced_to_s3_field ||= "#{name}_synced_to_s3".freeze
-      end
-
-      def synced_to_fog_field
-        @synced_to_fog_field ||= "#{name}_synced_to_fog".freeze
-      end
-
       def to_file style = default_style
         queued_for_write[style] || (File.new(filesystem_path(style), 'rb') if exists?(style)) || download_file(style)
       end
@@ -156,7 +165,7 @@ module Paperclip
       end
 
       def s3_path style
-        interpolate(options[:s3_path], style)
+        interpolate(self.class.s3_path_template, style)
       end
 
       def filesystem_paths
@@ -176,7 +185,7 @@ module Paperclip
         end
         paths.each do |style, file|
           log("saving to s3 #{file}")
-            s3_object = aws_bucket.object(s3_path(style).gsub(/^\/+/,''))
+            s3_object = self.class.aws_bucket.object(s3_path(style).gsub(/^\/+/,''))
             s3_object.upload_file(file,
                                   cache_control: "max-age=#{10.year.to_i}",
                                   content_type: instance_read(:content_type),
@@ -188,10 +197,6 @@ module Paperclip
         end
       end
 
-      def fog_storage
-        @fog_storage ||= Fog::Storage.new(@fog_credentials.merge(provider: @fog_provider).symbolize_keys)
-      end
-
       def write_to_fog
         return unless instance.respond_to? synced_to_fog_field
         return true if instance_read(:synced_to_fog)
@@ -210,7 +215,7 @@ module Paperclip
           }
 
           File.open(file, 'r') do |f|
-            fog_storage.put_object @fog_directory, path, f, options
+            self.class.fog_storage.put_object self.class.fog_directory, path, f, options
           end
         end
         # не вызываем колбеки и спокойно себя ведем если объект удален

test/interpolations_test.rb

@@ -67,7 +67,7 @@ class InterpolationsTest < Test::Unit::TestCase
   end
 
   should "reinterpolate :url" do
-    attachment = stub(options: {url: "/:id/"}, instance: stub(id: "1234"))
+    attachment = stub(class: stub(url_template: "/:id/"), instance: stub(id: "1234"))
     assert_equal "/1234/", Paperclip::Interpolations.url(attachment, :style)
   end
 

test/test_helper.rb

@@ -83,5 +83,5 @@ class FakeModel
 end
 
 def attachment options
-  Paperclip::Attachment.new(:avatar, FakeModel.new, options)
+  Paperclip::Attachment.build_class(:avatar, options).new(FakeModel.new)
 end