CarrierWave documentation:
> Note: `recreate_versions!` will throw an exception on records without
> an image. To avoid this, scope the records to those with images or
> check if an image exists within the block.
Resolves#1976:
NoMethodError: undefined method `read' for nil:NilClass
…/carrierwave-1.3.1/lib/carrierwave/uploader/cache.rb:81:in `sanitized_file'
…/carrierwave-1.3.1/lib/carrierwave/uploader/cache.rb:118:in `cache!'
…/carrierwave-1.3.1/lib/carrierwave/uploader/versions.rb:234:in `recreate_versions!'
db/migrate/20171130172334_rebuild_conference_pictures.rb:4:in `block in up'
Many migrations currently fail to run with:
> Directly inheriting from ActiveRecord::Migration is not supported.
> Please specify the Rails release the migration was written for:
>
> class Example < ActiveRecord::Migration[4.2]
I've annotated those that I need to run with the Rails version at the
time each was committed:
rake db:migrate:status \
| grep --perl-regexp --only-matching '(?<=^ down )\d{14}' \
| while read -r id; do
path="$(ls -1 db/migrate/${id}_*.rb)"
version="$(git show "$(git log --diff-filter=A --pretty=format:%H -- "$path")":Gemfile.lock \
| grep --perl-regexp --only-matching '(?<=^ rails \()\d+\.\d+(?=(\.\d+)+\))')"
sed --in-place -e "s/\(< ActiveRecord::Migration\)$/\\1[$version]/" "$path"
done
