Upgrade to Rails 6.1 and apply new framework defaults

db/migrate/20210512133611_add_service_name_to_active_storage_blobs.active_storage.rb

@@ -0,0 +1,22 @@
+# This migration comes from active_storage (originally 20190112182829)
+class AddServiceNameToActiveStorageBlobs < ActiveRecord::Migration[6.0]
+  def up
+    if table_exists?(:active_storage_blobs)
+      unless column_exists?(:active_storage_blobs, :service_name)
+        add_column :active_storage_blobs, :service_name, :string
+
+        if configured_service = ActiveStorage::Blob.service.name
+          ActiveStorage::Blob.unscoped.update_all(service_name: configured_service)
+        end
+
+        change_column :active_storage_blobs, :service_name, :string, null: false
+      end
+    end
+  end
+
+  def down
+    if table_exists?(:active_storage_blobs)
+      remove_column :active_storage_blobs, :service_name
+    end
+  end
+end

db/migrate/20210512133612_create_active_storage_variant_records.active_storage.rb

@@ -0,0 +1,14 @@
+# This migration comes from active_storage (originally 20191206030411)
+class CreateActiveStorageVariantRecords < ActiveRecord::Migration[6.0]
+  def change
+    if table_exists?(:active_storage_blobs)
+      create_table :active_storage_variant_records do |t|
+        t.belongs_to :blob, null: false, index: false
+        t.string :variation_digest, null: false
+
+        t.index %i[ blob_id variation_digest ], name: "index_active_storage_variant_records_uniqueness", unique: true
+        t.foreign_key :active_storage_blobs, column: :blob_id
+      end
+    end
+  end
+end