mirror of
https://github.com/rails/rails.git
synced 2022-11-09 12:12:34 -05:00
fc3acf2e8d
Permit checking whether a belongs_to association has been pointed to a new target record in the previous save and whether it will point to a new target record in the next save.
post.category # => #<Category id: 1, name: "Ruby">
post.category = Category.second # => #<Category id: 2, name: "Programming">
post.category_changed? # => true
post.category_previously_changed? # => false
post.save!
post.category_changed? # => false
post.category_previously_changed? # => true
|
||
|---|---|---|
| .. | ||
| assets | ||
| bug_report_templates | ||
| rails_guides | ||
| source | ||
| .document | ||
| CHANGELOG.md | ||
| rails_guides.rb | ||
| Rakefile | ||
| w3c_validator.rb | ||