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Switch to the writer DB to generate ASt previews

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George Claghorn 2019-12-05 09:21:25 -05:00 committed by George Claghorn
parent 34d66ca6ba
commit 9e06289a3b
2 changed files with 16 additions and 1 deletions
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6
activestorage/app/models/active_storage/preview.rb
View file

@ -74,7 +74,11 @@ class ActiveStorage::Preview
end
def process
previewer.preview { |attachable| image.attach(attachable) }
previewer.preview do |attachable|
ActiveRecord::Base.connected_to(role: ActiveRecord::Base.writing_role) do
image.attach(attachable)
end
end
end
def variant

11
activestorage/test/models/preview_test.rb
View file

@ -37,4 +37,15 @@ class ActiveStorage::PreviewTest < ActiveSupport::TestCase
blob.preview resize: "640x280"
end
end
test "previewing on the writer DB" do
blob = create_file_blob(filename: "report.pdf", content_type: "application/pdf")
# Simulate a selector middleware switching to a read-only replica.
ActiveRecord::Base.connection_handler.while_preventing_writes do
blob.preview(resize: "640x280").processed
end
assert blob.reload.preview_image.attached?
end
end