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103 lines
3.3 KiB
Ruby
103 lines
3.3 KiB
Ruby
# frozen_string_literal: true
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class ConvertToActiveStorage < ActiveRecord::Migration[5.2]
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require 'open-uri'
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ID_PARTITION_LIMIT = 1_000_000_000
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DIGEST = OpenSSL::Digest.const_get('SHA1').new
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MODELS = [Asset, TempFile, TinyMceAsset, User, ZipExport].freeze
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def up
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ActiveRecord::Base.connection.raw_connection.prepare('active_storage_blob_statement', <<-SQL)
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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)
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RETURNING id;
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SQL
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ActiveRecord::Base.connection.raw_connection.prepare('active_storage_attachment_statement', <<-SQL)
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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 ($1, $2, $3, $4, $5)
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SQL
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transaction do
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MODELS.each do |model|
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next unless ActiveRecord::Base.connection.table_exists?(model.table_name)
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attachments = model.column_names.map do |c|
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$1 if c =~ /(.+)_file_name$/
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end.compact
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next if attachments.blank?
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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__("#{attachment}_file_name").blank?
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res = ActiveRecord::Base.connection.raw_connection.exec_prepared(
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'active_storage_blob_statement', [
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key(instance, attachment),
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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") || 0,
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checksum(attachment),
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instance.updated_at.iso8601
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]
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)
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ActiveRecord::Base.connection.raw_connection.exec_prepared(
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'active_storage_attachment_statement', [
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attachment,
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model.name,
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instance.id,
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res[0]['id'],
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instance.updated_at.iso8601
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]
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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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end
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def down
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raise ActiveRecord::IrreversibleMigration
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end
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private
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ID_PARTITION_LIMIT = 1_000_000_000
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DIGEST = OpenSSL::Digest.const_get('SHA1').new
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def id_partition(id)
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if id < ID_PARTITION_LIMIT
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format('%09d', id).scan(/\d{3}/).join('/')
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else
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format('%012d', id).scan(/\d{3}/).join('/')
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end
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end
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def hash_data(instance, attachment)
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"#{instance.class.to_s.underscore.pluralize}/#{attachment.pluralize}/#{instance.id}/original"
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end
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def interpolate(pattern, instance, attachment)
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path = pattern
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path = path.gsub(':class', instance.class.to_s.underscore.pluralize)
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path = path.gsub(':attachment', attachment.pluralize)
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path = path.gsub(':id_partition', id_partition(instance.id))
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path = path.gsub(':hash', OpenSSL::HMAC.hexdigest(DIGEST,
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ENV['PAPERCLIP_HASH_SECRET'],
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hash_data(instance, attachment)))
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path.gsub(':filename', instance.__send__("#{attachment}_file_name"))
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end
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def key(instance, attachment)
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interpolate(':class/:attachment/:id_partition/:hash/original/:filename', instance, attachment)
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end
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def checksum(_attachment)
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'dummy'
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end
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end
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