| # This is a workaround for the Rails issue described in | |
| # https://github.com/rails/rails/issues/17368. | |
| # | |
| # When assigning `_ids=` on a has_many :through association, Rails immediately | |
| # persists the changes to the join table — even before `save` is called. This | |
| # module defers that persistence to an `after_save` callback, so the IDs are | |
| # only written when the parent record is saved. | |
| # | |
| # If you use this, make sure you understand its code and what it does and what | |
| # it doesn't. |
Ruby's regular expressions are unusually powerful. Postgres' regular expressions are not as powerful, but they come close; close enough that it's possible to do many pattern-based queries and string transformations entirely in a query.
And sometimes, it's very useful to have a single regular expression that works
| -# For each locale except the current one | |
| - (I18n.available_locales - [I18n.locale]).each do |locale| | |
| -# Add a link to the current URL but in `locale` language | |
| %link{rel: 'alternate', hreflang: locale, href: url_for(locale: locale)} |