2 files changed, 23 insertions, 2 deletions
diff --git a/activestorage/app/models/active_storage/blob.rb b/activestorage/app/models/active_storage/blob.rb
index 6112c57cc0..892a833fae 100644
--- a/activestorage/app/models/active_storage/blob.rb
+++ b/activestorage/app/models/active_storage/blob.rb
@@ -109,8 +109,9 @@ class ActiveStorage::Blob < ActiveRecord::Base
   # with users. Instead, the +service_url+ should only be exposed as a redirect from a stable, possibly authenticated URL.
   # Hiding the +service_url+ behind a redirect also gives you the power to change services without updating all URLs. And
   # it allows permanent URLs that redirect to the +service_url+ to be cached in the view.
-  def service_url(expires_in: service.url_expires_in, disposition: :inline, filename: self.filename)
-    service.url key, expires_in: expires_in, disposition: forcibly_serve_as_binary? ? :attachment : disposition, filename: filename, content_type: content_type
+  def service_url(expires_in: service.url_expires_in, disposition: :inline, filename: self.filename, **options)
+    service.url key, expires_in: expires_in, filename: filename, content_type: content_type,
+      disposition: forcibly_serve_as_binary? ? :attachment : disposition, **options
   end
 
   # Returns a URL that can be used to directly upload a file for this blob on the service. This URL is intended to be
diff --git a/activestorage/test/models/blob_test.rb b/activestorage/test/models/blob_test.rb
index 664939dfa7..5cd2a94326 100644
--- a/activestorage/test/models/blob_test.rb
+++ b/activestorage/test/models/blob_test.rb
@@ -2,8 +2,11 @@
 
 require "test_helper"
 require "database/setup"
+require "active_support/testing/method_call_assertions"
 
 class ActiveStorage::BlobTest < ActiveSupport::TestCase
+  include ActiveSupport::Testing::MethodCallAssertions
+
   test "create after upload sets byte size and checksum" do
     data = "Hello world!"
     blob = create_blob data: data
@@ -82,6 +85,23 @@ class ActiveStorage::BlobTest < ActiveSupport::TestCase
     end
   end
 
+  test "urls allow for custom options" do
+    blob = create_blob(filename: "original.txt")
+
+    options = [
+      blob.key,
+      expires_in: blob.service.url_expires_in,
+      disposition: :inline,
+      content_type: blob.content_type,
+      filename: blob.filename,
+      thumb_size: "300x300",
+      thumb_mode: "crop"
+    ]
+    assert_called_with(blob.service, :url, options) do
+      blob.service_url(thumb_size: "300x300", thumb_mode: "crop")
+    end
+  end
+
   test "purge deletes file from external service" do
     blob = create_blob