Fix shrine version for ruby 2.2

Appraisals

@@ -27,7 +27,7 @@ appraise "rails-5.0" do
     gem 'mongoid-paperclip', '>= 0.0.8', require: 'mongoid_paperclip'
     gem 'carrierwave-mongoid', '>= 0.6.3', require: 'carrierwave/mongoid'
     gem 'cancancan-mongoid'
-    gem 'shrine-mongoid', '~> 1.0'
+    gem 'shrine-mongoid', '~> 0.2'
   end
 end
 

gemfiles/rails_5.0.gemfile

@@ -46,7 +46,8 @@ group :test do
   gem "rubocop", "~> 0.68.1"
   gem "rubocop-performance"
   gem "simplecov", ">= 0.9", require: false
-  gem "shrine", "~> 3.0"
+  gem "shrine", "~> 2.13.0"
+  gem "shrine-memory"
   gem "timecop", ">= 0.5"
   gem "tzinfo-data", platforms: [:mingw, :mswin, :x64_mingw, :jruby]
 
@@ -61,7 +62,7 @@ group :mongoid do
   gem "mongoid-paperclip", ">= 0.0.8", require: "mongoid_paperclip"
   gem "carrierwave-mongoid", ">= 0.6.3", require: "carrierwave/mongoid"
   gem "cancancan-mongoid"
-  gem "shrine-mongoid", '~> 1.0'
+  gem "shrine-mongoid", "~> 0.2.4"
 end
 
 gemspec path: "../"

spec/dummy_app/app/active_record/shrine_versioning_uploader.rb

@@ -5,11 +5,14 @@ class ShrineVersioningUploader < Shrine
   plugin :determine_mime_type
   plugin :pretty_location
   plugin :remove_attachment
-  plugin :derivatives
 
-  Attacher.derivatives_processor do |original|
-    {
-      thumb: FakeIO.new('', filename: File.basename(original.path), content_type: File.extname(original.path)),
-    }
+  if Gem.loaded_specs['shrine'].version >= Gem::Version.create('3')
+    plugin :derivatives
+
+    Attacher.derivatives_processor do |original|
+      {
+        thumb: FakeIO.new('', filename: File.basename(original.path), content_type: File.extname(original.path)),
+      }
+    end
   end
 end

spec/dummy_app/app/mongoid/shrine_versioning_uploader.rb

@@ -5,11 +5,14 @@ class ShrineVersioningUploader < Shrine
   plugin :determine_mime_type
   plugin :pretty_location
   plugin :remove_attachment
-  plugin :derivatives
 
-  Attacher.derivatives_processor do |original|
-    {
-      thumb: FakeIO.new('', filename: File.basename(original.path), content_type: File.extname(original.path)),
-    }
+  if Gem.loaded_specs['shrine'].version >= Gem::Version.create('3')
+    plugin :derivatives
+
+    Attacher.derivatives_processor do |original|
+      {
+        thumb: FakeIO.new('', filename: File.basename(original.path), content_type: File.extname(original.path)),
+      }
+    end
   end
 end

spec/rails_admin/config/fields/types/shrine_spec.rb

@@ -11,9 +11,13 @@
     end
 
     before do
-      if record.shrine_versioning_asset
-        record.shrine_versioning_asset_derivatives!
-        record.save
+      if Gem.loaded_specs['shrine'].version >= Gem::Version.create('3')
+        if record.shrine_versioning_asset
+          record.shrine_versioning_asset_derivatives!
+          record.save
+        end
+      else
+        skip
       end
     end