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1c1f9d73a3
Common migrations look for all models with *_file_name attributes but I found that unreliable in our code base. It finds too many model classes and doesn't allow us to be more selective in the migration. So I used our own migration declaration to migrate exactly those attachments specified.
68 lines
1.7 KiB
Ruby
68 lines
1.7 KiB
Ruby
# frozen_string_literal: true
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module HasMigratingFile
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extend ActiveSupport::Concern
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@migrating_models = []
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def self.migrating_models
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@migrating_models
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end
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included do
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HasMigratingFile.migrating_models.push(name)
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end
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class_methods do
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def has_one_migrating(name, paperclip_options = {})
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# Active Storage declaration
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has_one_attached name
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# Backup Active Storage methods before they get overridden by Paperclip.
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alias_method "active_storage_#{name}", name
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alias_method "active_storage_#{name}=", "#{name}="
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# Paperclip declaration
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#
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# This will define the `name` and `name=` methods as well.
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has_attached_file name, paperclip_options
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# Paperclip callback to duplicate file with Active Storage
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#
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# We store files with Paperclip *and* Active Storage while we migrate
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# old Paperclip files to Active Storage. This enables availability
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# during the migration.
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public_send("after_#{name}_post_process") do
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path = processed_local_file_path(name)
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if public_send(name).errors.blank? && path.present?
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attach_file(name, File.open(path))
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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 attach_file(name, io)
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attachable = {
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io: io,
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filename: public_send("#{name}_file_name"),
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content_type: public_send("#{name}_content_type"),
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identify: false,
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}
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public_send("active_storage_#{name}=", attachable)
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end
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private
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def processed_local_file_path(name)
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attachment = public_send(name)
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temporary = attachment.queued_for_write[:original]
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if temporary&.path.present?
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temporary.path
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else
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attachment.path
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end
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end
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end
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