b5026e12a7
There could be inconsistencies in the database and an attachment might have a `record_id` pointing to a record which no longer exist. We were getting an exception in this case.
85 lines
2.9 KiB
Ruby
85 lines
2.9 KiB
Ruby
# This code is based on Thoughtbot's guide to migrating from Paperclip
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# to Active Storage:
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# https://github.com/thoughtbot/paperclip/blob/master/MIGRATING.md
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namespace :active_storage do
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desc "Copy paperclip's attachment database columns to active storage"
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task migrate_from_paperclip: :environment do
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logger = ApplicationLogger.new
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connection = ActiveRecord::Base.connection.raw_connection
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statement_name = "active_storage_statement"
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unless connection.exec("SELECT COUNT(*) FROM pg_prepared_statements WHERE name='#{statement_name}'").each_row.to_a[0][0] > 0
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connection.prepare(statement_name, <<-SQL)
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with rows as(
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INSERT INTO active_storage_blobs (
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key, filename, content_type, metadata, byte_size, checksum, created_at
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) VALUES ($1, $2, $3, '{}', $4, $5, $6) RETURNING id
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)
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INSERT INTO active_storage_attachments (
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name, record_type, record_id, blob_id, created_at
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) VALUES ($7, $8, $9, (SELECT id FROM rows), $10)
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SQL
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end
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Rails.application.eager_load!
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models = ActiveRecord::Base.descendants.reject(&:abstract_class?)
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ActiveRecord::Base.transaction do
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models.each do |model|
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next if model.name == "OldPassword" && !model.table_exists?
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attachments = model.column_names.map do |c|
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if c =~ /(.+)_file_name$/
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$1
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end
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end.compact
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if attachments.blank?
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next
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end
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model.find_each.each do |instance|
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attachments.each do |attachment|
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next if instance.send(:"storage_#{attachment}").attached?
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source = instance.send(attachment).path
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next if source.blank?
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file = File.read(source) if File.exist?(source)
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connection.exec_prepared(
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statement_name, [
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SecureRandom.uuid, # Alternatively instance.send("#{attachment}_file_name"),
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instance.send("#{attachment}_file_name"),
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instance.send("#{attachment}_content_type"),
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instance.send("#{attachment}_file_size"),
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file && Digest::MD5.base64digest(file) || SecureRandom.hex(32),
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instance.updated_at.iso8601,
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"storage_#{attachment}",
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model.name,
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instance.id,
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instance.updated_at.iso8601
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])
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end
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end
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end
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end
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ActiveStorage::Attachment.find_each do |attachment|
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dest = ActiveStorage::Blob.service.path_for(attachment.blob.key)
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next if File.exist?(dest) || !attachment.record
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name = attachment.name.delete_prefix("storage_")
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source = attachment.record.send(name).path
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if source && File.exist?(source)
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FileUtils.mkdir_p(File.dirname(dest))
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logger.info "Copying #{source} to #{dest}"
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FileUtils.cp(source, dest)
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end
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end
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end
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end
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