Upgrade Rails to a new version
When upgrading our apps between Rails major and minor versions, follow the official Rails guides.
We are trying to standardise our Rails config files. The guidelines for these are as follows:
load_defaultsis used, it should be top of the config
- Config options should be alphabetised
- Group together options that relate to the same option
config.assets.prefixshould be grouped together
- Remove any default/unnecessary comments
Gotchas for upgrading to Rails 5.1
Schema dumper changes
The schema dumper has been refactored in Rails 5.1 so the first migration after upgrading
will generate a lot of differences in
Notably whitespace and
using :btree index modifiers.
See this commit
and also this commit for details of the changes.
As part of the upgrade, regenerating the schema with
rake db:migrate and including the updated
db/schema.rb file will mean
the next migration doesn’t generate this noise.