rails/rails — pull request #7834 by sikachu (2012-10-03 17:24:35+00:00)
Title: Add `Relation#and` which is an alias of `#where`

This new method a syntatic sugar when you're chaining multiple #where clauses together.

```ruby
# Before
User.where("created_at < ?", 1.week.ago).where(state: 'active')

# After
User.where("created_at < ?", 1.week.ago).and(state: 'active')
```