Allows leaving `smtp_settings[:domain]` unspecified. Explicitly setting
it to `nil` (as when `OSEM_SMTP_DOMAIN` is unset) overrides the default
value of `'localhost.localdomain'` and caused SMTP connections to fail
with `EOFError`.
When running migration 20170705075039 followed by 20170715131706, the
latter fails due to lingering null values in a newly non-null column—
Mysql2::Error: Invalid use of NULL value: ALTER TABLE `tracks` CHANGE `state` `state` varchar(255) DEFAULT 'new' NOT NULL
db/migrate/20170715131706_make_track_state_not_null_and_add_default_value.rb:17:in `change'
—despite having apparently converted any existing null values prior to
changing the column type. Investigation reveals that actually the
attempted conversion has had no effect, and that this can be resolved by
clearing ActiveRecord internal caches between migrations:
connection.schema_cache.clear_data_source_cache! 'tracks'
The same problem also affects running 20170705075039 followed by
20170720134353, but in that case it leads to silent data corruption as
`change_column_null` automatically converts any lingering null values.
This commit 1) clears ActiveRecord internal caches at the beginning of
each affected migration, and 2) replaces `change_column_null` with
`change_column` to reflect that no automatic conversion is intended.
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
