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class AddForeignKeyConstraintToActiveStorageAttachmentsForBlobId < ActiveRecord::Migration[6.0]
def up
return if foreign_key_exists?(:active_storage_attachments, column: :blob_id)
if table_exists?(:active_storage_blobs)
add_foreign_key :active_storage_attachments, :active_storage_blobs, column: :blob_id
end
end
end
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