diff options
| -rw-r--r-- | activestorage/lib/active_storage/attached/macros.rb | 6 | ||||
| -rw-r--r-- | activestorage/test/models/attachments_test.rb | 13 |
2 files changed, 19 insertions, 0 deletions
diff --git a/activestorage/lib/active_storage/attached/macros.rb b/activestorage/lib/active_storage/attached/macros.rb index 35a081adc4..f0256718ac 100644 --- a/activestorage/lib/active_storage/attached/macros.rb +++ b/activestorage/lib/active_storage/attached/macros.rb @@ -12,6 +12,10 @@ module ActiveStorage # There is no column defined on the model side, Active Storage takes # care of the mapping between your records and the attachment. # + # To avoid N+1 queries, you can include the attached blobs in your query like so: + # + # User.with_attached_avatar + # # Under the covers, this relationship is implemented as a +has_one+ association to a # ActiveStorage::Attachment record and a +has_one-through+ association to a # ActiveStorage::Blob record. These associations are available as +avatar_attachment+ @@ -33,6 +37,8 @@ module ActiveStorage has_one :"#{name}_attachment", -> { where(name: name) }, class_name: "ActiveStorage::Attachment", as: :record has_one :"#{name}_blob", through: :"#{name}_attachment", class_name: "ActiveStorage::Blob", source: :blob + scope :"with_attached_#{name}", -> { includes("#{name}_attachment": :blob) } + if dependent == :purge_later before_destroy { public_send(name).purge_later } end diff --git a/activestorage/test/models/attachments_test.rb b/activestorage/test/models/attachments_test.rb index ac346c0087..379ae0a416 100644 --- a/activestorage/test/models/attachments_test.rb +++ b/activestorage/test/models/attachments_test.rb @@ -84,6 +84,19 @@ class ActiveStorage::AttachmentsTest < ActiveSupport::TestCase end end + test "find with attached blob" do + records = %w[alice bob].map do |name| + User.create!(name: name).tap do |user| + user.avatar.attach create_blob(filename: "#{name}.jpg") + end + end + + users = User.where(id: records.map(&:id)).with_attached_avatar.all + + assert_equal "alice.jpg", users.first.avatar.filename.to_s + assert_equal "bob.jpg", users.second.avatar.filename.to_s + end + test "attach existing blobs" do @user.highlights.attach create_blob(filename: "funky.jpg"), create_blob(filename: "wonky.jpg") |