diff --git a/Gemfile b/Gemfile
index 401c9f5247..52b6fe13b0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -34,6 +34,8 @@ group :test do
   gem 'rspec-rails', '>= 2.14'
   gem 'rubocop', '~> 0.41.2'
   gem 'simplecov', '>= 0.9', require: false
+  gem 'shrine', '~> 2.0'
+  gem 'shrine-memory'
   gem 'timecop', '>= 0.5'
 
   platforms :ruby_19 do
diff --git a/gemfiles/cancan.gemfile b/gemfiles/cancan.gemfile
index a71f660687..54770cd30c 100644
--- a/gemfiles/cancan.gemfile
+++ b/gemfiles/cancan.gemfile
@@ -36,6 +36,8 @@ group :test do
   gem "rack-cache", require: "rack/cache"
   gem "rspec-rails", ">= 2.14"
   gem "rubocop", "~> 0.41.2"
+  gem "shrine", "~> 2.0"
+  gem "shrine-memory"
   gem "simplecov", ">= 0.9", require: false
   gem "timecop", ">= 0.5"
   gem "cancan", ">= 1.6"
diff --git a/gemfiles/rails_4.0.gemfile b/gemfiles/rails_4.0.gemfile
index e2f757bb1a..92882fff5e 100644
--- a/gemfiles/rails_4.0.gemfile
+++ b/gemfiles/rails_4.0.gemfile
@@ -13,6 +13,7 @@ gem "kaminari", "~> 0.14"
 
 group :active_record do
   gem "paper_trail", "~> 5.0"
+  gem "test_after_commit"
 
   platforms :ruby, :mswin, :mingw do
     gem "mysql2", ">= 0.3.14"
@@ -45,6 +46,8 @@ group :test do
   gem "rack-cache", require: "rack/cache"
   gem "rspec-rails", ">= 2.14"
   gem "rubocop", "~> 0.41.2"
+  gem "shrine", "~> 2.0"
+  gem "shrine-memory"
   gem "simplecov", ">= 0.9", require: false
   gem "timecop", ">= 0.5"
   gem "cancancan", "~> 1.12"
@@ -60,6 +63,7 @@ group :mongoid do
   gem "mongoid-paperclip", ">= 0.0.8", require: "mongoid_paperclip"
   gem "carrierwave-mongoid", ">= 0.6.3", require: "carrierwave/mongoid"
   gem "refile-mongoid", github: "DimaSamodurov/refile-mongoid", platforms: :ruby
+  gem "shrine-mongoid"
 end
 
 platforms :ruby do
diff --git a/gemfiles/rails_4.1.gemfile b/gemfiles/rails_4.1.gemfile
index 199a4e7084..b33f7d3982 100644
--- a/gemfiles/rails_4.1.gemfile
+++ b/gemfiles/rails_4.1.gemfile
@@ -10,6 +10,7 @@ gem "capybara", ">= 0.8", group: :test
 
 group :active_record do
   gem "paper_trail", ">= 5.0"
+  gem "test_after_commit"
 
   platforms :ruby, :mswin, :mingw do
     gem "mysql2", ">= 0.3.14"
@@ -42,6 +43,8 @@ group :test do
   gem "rack-cache", require: "rack/cache"
   gem "rspec-rails", ">= 2.14"
   gem "rubocop", "~> 0.41.2"
+  gem "shrine", "~> 2.0"
+  gem "shrine-memory"
   gem "simplecov", ">= 0.9", require: false
   gem "timecop", ">= 0.5"
   gem "cancancan", "~> 1.12"
@@ -57,6 +60,7 @@ group :mongoid do
   gem "mongoid-paperclip", ">= 0.0.8", require: "mongoid_paperclip"
   gem "carrierwave-mongoid", ">= 0.6.3", require: "carrierwave/mongoid"
   gem "refile-mongoid", github: "DimaSamodurov/refile-mongoid", platforms: :ruby
+  gem "shrine-mongoid"
 end
 
 platforms :ruby do
diff --git a/gemfiles/rails_4.2.gemfile b/gemfiles/rails_4.2.gemfile
index 2ed92fa5dd..40f130d88e 100644
--- a/gemfiles/rails_4.2.gemfile
+++ b/gemfiles/rails_4.2.gemfile
@@ -11,6 +11,7 @@ gem "capybara", ">= 0.8", group: :test
 
 group :active_record do
   gem "paper_trail", ">= 5.0"
+  gem "test_after_commit"
 
   platforms :ruby, :mswin, :mingw do
     gem "mysql2", ">= 0.3.14"
@@ -43,6 +44,8 @@ group :test do
   gem "rack-cache", require: "rack/cache"
   gem "rspec-rails", ">= 2.14"
   gem "rubocop", "~> 0.41.2"
+  gem "shrine", "~> 2.0"
+  gem "shrine-memory"
   gem "simplecov", ">= 0.9", require: false
   gem "timecop", ">= 0.5"
   gem "cancancan", "~> 1.12"
@@ -58,6 +61,7 @@ group :mongoid do
   gem "mongoid-paperclip", ">= 0.0.8", require: "mongoid_paperclip"
   gem "carrierwave-mongoid", ">= 0.6.3", require: "carrierwave/mongoid"
   gem "refile-mongoid", github: "DimaSamodurov/refile-mongoid", platforms: :ruby
+  gem "shrine-mongoid"
 end
 
 platforms :ruby do
diff --git a/gemfiles/rails_5.0.gemfile b/gemfiles/rails_5.0.gemfile
index cdd75fe315..963ef603cb 100644
--- a/gemfiles/rails_5.0.gemfile
+++ b/gemfiles/rails_5.0.gemfile
@@ -42,6 +42,8 @@ group :test do
   gem "rack-cache", require: "rack/cache"
   gem "rspec-rails", ">= 2.14"
   gem "rubocop", "~> 0.41.2"
+  gem "shrine", "~> 2.0"
+  gem "shrine-memory"
   gem "simplecov", ">= 0.9", require: false
   gem "timecop", ">= 0.5"
   gem "cancancan", "~> 2.0"
@@ -57,6 +59,7 @@ 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"
 end
 
 gemspec path: "../"
diff --git a/gemfiles/rails_5.1.gemfile b/gemfiles/rails_5.1.gemfile
index 96e9850409..b263364ced 100644
--- a/gemfiles/rails_5.1.gemfile
+++ b/gemfiles/rails_5.1.gemfile
@@ -43,6 +43,8 @@ group :test do
   gem "rack-cache", require: "rack/cache"
   gem "rspec-rails", ">= 2.14"
   gem "rubocop", "~> 0.41.2"
+  gem "shrine", "~> 2.0"
+  gem "shrine-memory"
   gem "simplecov", ">= 0.9", require: false
   gem "timecop", ">= 0.5"
   gem "cancancan", "~> 2.0"
@@ -58,6 +60,7 @@ 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"
 end
 
 gemspec path: "../"
diff --git a/gemfiles/rails_5.2.gemfile b/gemfiles/rails_5.2.gemfile
index ec0b800956..4dc67c87ae 100644
--- a/gemfiles/rails_5.2.gemfile
+++ b/gemfiles/rails_5.2.gemfile
@@ -37,6 +37,8 @@ group :test do
   gem "rack-cache", require: "rack/cache"
   gem "rspec-rails", ">= 2.14"
   gem "rubocop", "~> 0.41.2"
+  gem "shrine", "~> 2.0"
+  gem "shrine-memory"
   gem "simplecov", ">= 0.9", require: false
   gem "timecop", ">= 0.5"
   gem "cancancan", "~> 2.0"
@@ -52,6 +54,7 @@ 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"
 end
 
 gemspec path: "../"
diff --git a/lib/rails_admin/config/fields.rb b/lib/rails_admin/config/fields.rb
index a708698909..81d826425e 100644
--- a/lib/rails_admin/config/fields.rb
+++ b/lib/rails_admin/config/fields.rb
@@ -84,4 +84,5 @@ def self.register_factory(&block)
 require 'rails_admin/config/fields/factories/carrierwave'
 require 'rails_admin/config/fields/factories/refile'
 require 'rails_admin/config/fields/factories/active_storage'
+require 'rails_admin/config/fields/factories/shrine'
 require 'rails_admin/config/fields/factories/association'
diff --git a/lib/rails_admin/config/fields/factories/shrine.rb b/lib/rails_admin/config/fields/factories/shrine.rb
new file mode 100644
index 0000000000..da690c604e
--- /dev/null
+++ b/lib/rails_admin/config/fields/factories/shrine.rb
@@ -0,0 +1,27 @@
+require 'rails_admin/config/fields'
+require 'rails_admin/config/fields/types'
+require 'rails_admin/config/fields/types/file_upload'
+
+RailsAdmin::Config::Fields.register_factory do |parent, properties, fields|
+  next false unless defined?(::Shrine)
+
+  attachment_names = parent.abstract_model.model.ancestors.select { |m| m.is_a?(Shrine::Attachment) }.map { |a| a.instance_variable_get("@name") }
+  next false if attachment_names.blank?
+
+  attachment_name = attachment_names.detect { |a| a == properties.name.to_s.chomp('_data').to_sym }
+  next false unless attachment_name
+
+  field = RailsAdmin::Config::Fields::Types.load(:shrine).new(parent, attachment_name, properties)
+  fields << field
+
+  data_field_name = "#{attachment_name}_data".to_sym
+  child_properties = parent.abstract_model.properties.detect { |p| p.name == data_field_name }
+  next true unless child_properties
+
+  children_field = fields.detect { |f| f.name == data_field_name } || RailsAdmin::Config::Fields.default_factory.call(parent, child_properties, fields)
+  children_field.hide unless field == children_field
+  children_field.filterable(false) unless field == children_field
+
+  field.children_fields([data_field_name])
+  true
+end
diff --git a/lib/rails_admin/config/fields/types/all.rb b/lib/rails_admin/config/fields/types/all.rb
index a186ba8025..6f23ea3663 100644
--- a/lib/rails_admin/config/fields/types/all.rb
+++ b/lib/rails_admin/config/fields/types/all.rb
@@ -26,6 +26,7 @@
 require 'rails_admin/config/fields/types/hidden'
 require 'rails_admin/config/fields/types/text'
 require 'rails_admin/config/fields/types/serialized'
+require 'rails_admin/config/fields/types/shrine'
 require 'rails_admin/config/fields/types/time'
 require 'rails_admin/config/fields/types/timestamp'
 require 'rails_admin/config/fields/types/color'
diff --git a/lib/rails_admin/config/fields/types/shrine.rb b/lib/rails_admin/config/fields/types/shrine.rb
new file mode 100644
index 0000000000..b8a5b8c465
--- /dev/null
+++ b/lib/rails_admin/config/fields/types/shrine.rb
@@ -0,0 +1,48 @@
+require 'rails_admin/config/fields/types/file_upload'
+
+module RailsAdmin
+  module Config
+    module Fields
+      module Types
+        class Shrine < RailsAdmin::Config::Fields::Types::FileUpload
+          RailsAdmin::Config::Fields::Types.register(self)
+
+          register_instance_option :thumb_method do
+            unless defined? @thumb_method
+              @thumb_method = begin
+                next nil unless value.is_a?(Hash)
+
+                if value.key?(:thumb)
+                  :thumb
+                elsif value.key?(:thumbnail)
+                  :thumbnail
+                else
+                  value.keys.first
+                end
+              end
+            end
+            @thumb_method
+          end
+
+          register_instance_option :delete_method do
+            "remove_#{name}" if bindings[:object].respond_to?("remove_#{name}")
+          end
+
+          register_instance_option :cache_method do
+            "cached_#{name}_data" if bindings[:object].respond_to?("cached_#{name}_data")
+          end
+
+          def resource_url(thumb = nil)
+            return nil unless value
+
+            if value.is_a?(Hash)
+              value[thumb || value.keys.first].url
+            else
+              value.url
+            end
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/controllers/rails_admin/main_controller_spec.rb b/spec/controllers/rails_admin/main_controller_spec.rb
index a6e801abfc..81e2ee3d43 100644
--- a/spec/controllers/rails_admin/main_controller_spec.rb
+++ b/spec/controllers/rails_admin/main_controller_spec.rb
@@ -392,6 +392,9 @@ class TeamWithNumberedPlayers < Team
         field :active_storage_assets do
           delete_method :remove_active_storage_assets
         end if defined?(ActiveStorage)
+        field :shrine_asset do
+          delete_method :remove_shrine_asset
+        end if defined?(Shrine)
       end
       controller.params = HashWithIndifferentAccess.new(
         'field_test' => {
@@ -408,7 +411,8 @@ class TeamWithNumberedPlayers < Team
           'delete_paperclip_asset' => 'test',
           'should_not_be_here' => 'test',
         }.merge(defined?(Refile) ? {'refile_asset' => 'test', 'remove_refile_asset' => 'test'} : {}).
-          merge(defined?(ActiveStorage) ? {'active_storage_asset' => 'test', 'remove_active_storage_asset' => 'test', 'active_storage_assets' => 'test', 'remove_active_storage_assets' => 'test'} : {}),
+          merge(defined?(ActiveStorage) ? {'active_storage_asset' => 'test', 'remove_active_storage_asset' => 'test', 'active_storage_assets' => 'test', 'remove_active_storage_assets' => 'test'} : {}).
+          merge(defined?(Shrine) ? {'shrine_asset' => 'test', 'remove_shrine_asset' => 'test'} : {}),
       )
 
       controller.send(:sanitize_params_for!, :create, RailsAdmin.config(FieldTest), controller.params['field_test'])
@@ -425,7 +429,8 @@ class TeamWithNumberedPlayers < Team
         'paperclip_asset' => 'test',
         'delete_paperclip_asset' => 'test',
       }.merge(defined?(Refile) ? {'refile_asset' => 'test', 'remove_refile_asset' => 'test'} : {}).
-        merge(defined?(ActiveStorage) ? {'active_storage_asset' => 'test', 'remove_active_storage_asset' => 'test', 'active_storage_assets' => 'test', 'remove_active_storage_assets' => 'test'} : {}))
+        merge(defined?(ActiveStorage) ? {'active_storage_asset' => 'test', 'remove_active_storage_asset' => 'test', 'active_storage_assets' => 'test', 'remove_active_storage_assets' => 'test'} : {}).
+        merge(defined?(Shrine) ? {'shrine_asset' => 'test', 'remove_shrine_asset' => 'test'} : {}))
     end
 
     it 'allows for polymorphic associations parameters' do
diff --git a/spec/dummy_app/Gemfile b/spec/dummy_app/Gemfile
index 778fcdc579..9e79e3bd12 100644
--- a/spec/dummy_app/Gemfile
+++ b/spec/dummy_app/Gemfile
@@ -27,6 +27,7 @@ group :mongoid do
   gem 'mongoid-paperclip', '>= 0.0.8', require: 'mongoid_paperclip'
   gem 'carrierwave-mongoid', '>= 0.6.3', require: 'carrierwave/mongoid'
   # gem 'refile-mongoid', '>= 0.0.1', platforms: [:ruby_21, :ruby_22]
+  gem 'shrine-mongoid'
 end
 
 gem 'carrierwave', '>= 0.8'
@@ -36,6 +37,8 @@ gem 'mini_magick', '>= 3.4'
 gem 'mlb', '>= 0.7'
 gem 'paperclip', '>= 3.4'
 gem 'rails_admin', path: '../../'
+gem 'shrine', '~> 2.0'
+gem 'shrine-memory'
 
 platforms :ruby_21, :ruby_22 do
   # gem 'refile', '>= 0.5', require: 'refile/rails'
diff --git a/spec/dummy_app/app/active_record/field_test.rb b/spec/dummy_app/app/active_record/field_test.rb
index db43f6b637..23815f1f98 100644
--- a/spec/dummy_app/app/active_record/field_test.rb
+++ b/spec/dummy_app/app/active_record/field_test.rb
@@ -47,6 +47,9 @@ def carrierwave_assets=(files)
     end
   end
 
+  include ShrineUploader.attachment(:shrine_asset)
+  include ShrineVersioningUploader.attachment(:shrine_versioning_asset)
+
   if ::Rails.version >= '4.1' # enum support was added in Rails 4.1
     enum string_enum_field: {S: 's', M: 'm', L: 'l'}
     enum integer_enum_field: [:small, :medium, :large]
diff --git a/spec/dummy_app/app/active_record/shrine_uploader.rb b/spec/dummy_app/app/active_record/shrine_uploader.rb
new file mode 100644
index 0000000000..b8ab3ba0d8
--- /dev/null
+++ b/spec/dummy_app/app/active_record/shrine_uploader.rb
@@ -0,0 +1,8 @@
+class ShrineUploader < Shrine
+  plugin :activerecord
+
+  plugin :cached_attachment_data
+  plugin :determine_mime_type
+  plugin :pretty_location
+  plugin :remove_attachment
+end
diff --git a/spec/dummy_app/app/active_record/shrine_versioning_uploader.rb b/spec/dummy_app/app/active_record/shrine_versioning_uploader.rb
new file mode 100644
index 0000000000..20633d0d15
--- /dev/null
+++ b/spec/dummy_app/app/active_record/shrine_versioning_uploader.rb
@@ -0,0 +1,18 @@
+class ShrineVersioningUploader < Shrine
+  plugin :activerecord
+
+  plugin :cached_attachment_data
+  plugin :delete_raw
+  plugin :determine_mime_type
+  plugin :pretty_location
+  plugin :processing
+  plugin :remove_attachment
+  plugin :versions
+
+  process(:store) do |io|
+    {
+      original: io,
+      thumb: FakeIO.another_version(io, :thumb),
+    }
+  end
+end
diff --git a/spec/dummy_app/app/mongoid/field_test.rb b/spec/dummy_app/app/mongoid/field_test.rb
index f47ab1b287..d6eaeb82b7 100644
--- a/spec/dummy_app/app/mongoid/field_test.rb
+++ b/spec/dummy_app/app/mongoid/field_test.rb
@@ -33,6 +33,11 @@ class FieldTest
   field :protected_field, type: String
   has_mongoid_attached_file :paperclip_asset, styles: {thumb: '100x100>'}
 
+  field :shrine_asset_data, type: String
+  include ShrineUploader::Attachment.new(:shrine_asset)
+  field :shrine_versioning_asset_data, type: String
+  include ShrineVersioningUploader::Attachment.new(:shrine_versioning_asset)
+
   has_many :nested_field_tests, dependent: :destroy, inverse_of: :field_test, autosave: true
   accepts_nested_attributes_for :nested_field_tests, allow_destroy: true
 
diff --git a/spec/dummy_app/app/mongoid/shrine_uploader.rb b/spec/dummy_app/app/mongoid/shrine_uploader.rb
new file mode 100644
index 0000000000..c9cb9533ce
--- /dev/null
+++ b/spec/dummy_app/app/mongoid/shrine_uploader.rb
@@ -0,0 +1,8 @@
+class ShrineUploader < Shrine
+  plugin :mongoid
+
+  plugin :cached_attachment_data
+  plugin :determine_mime_type
+  plugin :pretty_location
+  plugin :remove_attachment
+end
diff --git a/spec/dummy_app/app/mongoid/shrine_versioning_uploader.rb b/spec/dummy_app/app/mongoid/shrine_versioning_uploader.rb
new file mode 100644
index 0000000000..db4813a57d
--- /dev/null
+++ b/spec/dummy_app/app/mongoid/shrine_versioning_uploader.rb
@@ -0,0 +1,18 @@
+class ShrineVersioningUploader < Shrine
+  plugin :mongoid
+
+  plugin :cached_attachment_data
+  plugin :delete_raw
+  plugin :determine_mime_type
+  plugin :pretty_location
+  plugin :processing
+  plugin :remove_attachment
+  plugin :versions
+
+  process(:store) do |io|
+    {
+      original: io,
+      thumb: FakeIO.another_version(io, :thumb),
+    }
+  end
+end
diff --git a/spec/dummy_app/config/initializers/shrine.rb b/spec/dummy_app/config/initializers/shrine.rb
new file mode 100644
index 0000000000..901b6738e4
--- /dev/null
+++ b/spec/dummy_app/config/initializers/shrine.rb
@@ -0,0 +1,7 @@
+require 'shrine'
+require 'shrine/storage/memory'
+
+Shrine.storages = {
+  cache: Shrine::Storage::Memory.new,
+  store: Shrine::Storage::Memory.new,
+}
diff --git a/spec/dummy_app/db/migrate/20181029101829_add_shrine_data_to_field_tests.rb b/spec/dummy_app/db/migrate/20181029101829_add_shrine_data_to_field_tests.rb
new file mode 100644
index 0000000000..9daa39402a
--- /dev/null
+++ b/spec/dummy_app/db/migrate/20181029101829_add_shrine_data_to_field_tests.rb
@@ -0,0 +1,6 @@
+class AddShrineDataToFieldTests < MigrationBase
+  def change
+    add_column :field_tests, :shrine_asset_data, :text
+    add_column :field_tests, :shrine_versioning_asset_data, :text
+  end
+end
diff --git a/spec/rails_admin/config/fields/base_spec.rb b/spec/rails_admin/config/fields/base_spec.rb
index caedb28864..7748d6538a 100644
--- a/spec/rails_admin/config/fields/base_spec.rb
+++ b/spec/rails_admin/config/fields/base_spec.rb
@@ -132,6 +132,21 @@ class CommentReversed < Tableless
         end
       end
     end
+
+    if defined?(Shrine)
+      context 'of a Shrine installation' do
+        it 'is the parent field itself' do
+          expect(RailsAdmin.config(FieldTest).fields.detect { |f| f.name == :shrine_asset }.children_fields).to eq([:shrine_asset_data])
+          expect(RailsAdmin.config(FieldTest).fields.detect { |f| f.name == :shrine_asset }.hidden?).to be_falsey
+        end
+
+        it 'is not filterable' do
+          fields = RailsAdmin.config(FieldTest).fields.select { |f| [:shrine_asset_data].include?(f.name) }
+          expect(fields).to all(be_hidden)
+          expect(fields).not_to include(be_filterable)
+        end
+      end
+    end
   end
 
   describe '#form_default_value' do
diff --git a/spec/rails_admin/config/fields/types/file_upload_spec.rb b/spec/rails_admin/config/fields/types/file_upload_spec.rb
index d9c70d1fba..aba346fae1 100644
--- a/spec/rails_admin/config/fields/types/file_upload_spec.rb
+++ b/spec/rails_admin/config/fields/types/file_upload_spec.rb
@@ -16,6 +16,10 @@
           field :active_storage_asset do
             delete_method :remove_active_storage_asset
           end if defined?(ActiveStorage)
+          field :shrine_asset do
+            delete_method :remove_shrine_asset
+            cache_method :cached_shrine_asset_data
+          end if defined?(Shrine)
         end
       end
       expect(RailsAdmin.config(FieldTest).field(:carrierwave_asset).allowed_methods.collect(&:to_s)).to eq %w(carrierwave_asset remove_carrierwave_asset carrierwave_asset_cache)
@@ -23,6 +27,7 @@
       expect(RailsAdmin.config(FieldTest).field(:paperclip_asset).allowed_methods.collect(&:to_s)).to eq %w(paperclip_asset delete_paperclip_asset)
       expect(RailsAdmin.config(FieldTest).field(:refile_asset).allowed_methods.collect(&:to_s)).to eq %w(refile_asset remove_refile_asset) if defined?(Refile)
       expect(RailsAdmin.config(FieldTest).field(:active_storage_asset).allowed_methods.collect(&:to_s)).to eq %w(active_storage_asset remove_active_storage_asset) if defined?(ActiveStorage)
+      expect(RailsAdmin.config(FieldTest).field(:shrine_asset).allowed_methods.collect(&:to_s)).to eq %w(shrine_asset remove_shrine_asset cached_shrine_asset_data) if defined?(Shrine)
     end
   end
 
diff --git a/spec/rails_admin/config/fields/types/shrine_spec.rb b/spec/rails_admin/config/fields/types/shrine_spec.rb
new file mode 100644
index 0000000000..6b4b80be8b
--- /dev/null
+++ b/spec/rails_admin/config/fields/types/shrine_spec.rb
@@ -0,0 +1,129 @@
+require 'spec_helper'
+
+describe RailsAdmin::Config::Fields::Types::Shrine do
+  context 'when asset is an image with versions' do
+    let(:record) { FactoryBot.create :field_test, shrine_versioning_asset: FakeIO.new('dummy', filename: 'test.jpg', content_type: 'image/jpeg') }
+    let(:field) do
+      RailsAdmin.config('FieldTest').fields.detect do |f|
+        f.name == :shrine_versioning_asset
+      end.with(object: record)
+    end
+
+    describe '#image?' do
+      it 'returns true' do
+        expect(field.image?).to be_truthy
+      end
+    end
+
+    describe '#value' do
+      context 'when attachment exists' do
+        it 'returns attached object' do
+          expect(field.value).to be_a(Hash)
+        end
+      end
+
+      context 'when attachment does not exist' do
+        let(:record) { FactoryBot.create :field_test }
+
+        it 'returns nil' do
+          expect(field.value).to be_nil
+        end
+      end
+    end
+
+    describe '#thumb_method' do
+      it 'returns :thumb' do
+        expect(field.thumb_method).to eq(:thumb)
+      end
+    end
+
+    describe '#resource_url' do
+      context 'when calling without thumb' do
+        it 'returns original url' do
+          expect(field.resource_url).to match(/original-/)
+        end
+      end
+
+      context 'when calling with thumb' do
+        it 'returns thumb url' do
+          expect(field.resource_url(field.thumb_method)).to match(/thumb-/)
+        end
+      end
+    end
+  end
+
+  context 'when asset without versions' do
+    let(:record) { FactoryBot.create :field_test }
+    let(:field) do
+      RailsAdmin.config('FieldTest').fields.detect do |f|
+        f.name == :shrine_asset
+      end.with(object: record)
+    end
+
+    describe '#image?' do
+      context 'when attachment is an image' do
+        let(:record) { FactoryBot.create :field_test, shrine_asset: FakeIO.new('dummy', filename: 'test.jpg', content_type: 'image/jpeg') }
+
+        it 'returns true' do
+          expect(field.image?).to be_truthy
+        end
+      end
+
+      context 'when attachment is not an image' do
+        let(:record) { FactoryBot.create :field_test, shrine_asset: FakeIO.new('dummy', filename: 'test.txt', content_type: 'text/plain') }
+
+        it 'returns false' do
+          expect(field.image?).to be_falsy
+        end
+      end
+    end
+
+    describe '#value' do
+      context 'when attachment exists' do
+        let(:record) { FactoryBot.create :field_test, shrine_asset: FakeIO.new('dummy', filename: 'test.txt', content_type: 'text/plain') }
+
+        it 'returns attached object' do
+          expect(field.value).to be_a(ShrineUploader::UploadedFile)
+        end
+      end
+
+      context 'when attachment does not exist' do
+        it 'returns nil' do
+          expect(field.value).to be_nil
+        end
+      end
+    end
+
+    describe '#thumb_method' do
+      let(:record) { FactoryBot.create :field_test, shrine_asset: FakeIO.new('dummy', filename: 'test.jpg', content_type: 'image/jpeg') }
+
+      it 'returns nil' do
+        expect(field.thumb_method).to eq(nil)
+      end
+    end
+
+    describe '#resource_url' do
+      context 'when calling without thumb' do
+        let(:record) { FactoryBot.create :field_test, shrine_asset: FakeIO.new('dummy', filename: 'test.txt', content_type: 'text/plain') }
+
+        it 'returns url' do
+          expect(field.resource_url).not_to be_nil
+        end
+      end
+
+      context 'when calling with thumb' do
+        let(:record) { FactoryBot.create :field_test, shrine_asset: FakeIO.new('dummy', filename: 'test.jpg', content_type: 'image/jpeg') }
+
+        it 'returns url' do
+          expect(field.resource_url(field.thumb_method)).not_to be_nil
+        end
+      end
+
+      context 'when attachment does not exist' do
+        it 'returns nil' do
+          expect(field.resource_url).to be_nil
+        end
+      end
+    end
+  end
+end if defined?(Shrine)
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 46b46c6f48..ad732ae179 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -23,6 +23,7 @@
 require 'policies'
 require 'database_cleaner'
 require "orm/#{CI_ORM}"
+require 'support/fakeio'
 
 Dir[File.expand_path('../shared_examples/**/*.rb', __FILE__)].each { |f| require f }
 
diff --git a/spec/support/fakeio.rb b/spec/support/fakeio.rb
new file mode 100644
index 0000000000..1cfffd8696
--- /dev/null
+++ b/spec/support/fakeio.rb
@@ -0,0 +1,23 @@
+require 'forwardable'
+require 'stringio'
+
+class FakeIO
+  attr_reader :original_filename, :content_type
+
+  def initialize(content, filename: nil, content_type: nil)
+    @io = StringIO.new(content)
+    @original_filename = filename
+    @content_type = content_type
+  end
+
+  def self.another_version(object, version_name)
+    FakeIO.new(
+      "#{version_name}-#{object.read}",
+      filename: "#{version_name}-#{object.original_filename}",
+      content_type: object.content_type,
+    )
+  end
+
+  extend Forwardable
+  delegate %i(read rewind eof? close size) => :@io
+end