Merge branch 'master' into adequaterecord

* master: (70 commits)
  [ci skip] Added link to ruby-lang.org installation.
  Use the index on hidden field
  `collection_check_boxes` respects `:index` option for the hidden filed name.
  docs, double meaning of `serialize` argument. Closes #14284.
  Just call read_attribute, no need to use `send`.
  - Fix lingering reference to `:text` instead of the newer `:plain` - Section references `form_tag` instead of the `form_for` used in the example
  again, read_attribute is public, so just call it
  read_attribute is public, so we should just call it
  Disable assest cache store in docs [ci skip]
  Make counter cache decrementation on destroy idempotent
  Write the failing test case for concurrent counter cache
  [ci skip] Use plain underscore instead of "\_".
  Update documentation to use Rails.application instead
  Add a changelog entry for #14546 [ci skip]
  Move tests for deep_dup and duplicable to object directory
  Missing 'are' in note - [ci skip]
  CollectionHelpers now accepts a readonly option
  Fix a few typos [ci skip]
  Bundle tzinfo-data on :x64_mingw (64-bit Ruby on Windows).
  don't bother with an offset if the offset is zero
  ...

1 files changed, 9 insertions, 6 deletions

diff --git a/activerecord/lib/active_record/autosave_association.rb b/activerecord/lib/active_record/autosave_association.rb
index e9622ca0c1..f149d8f127 100644
--- a/activerecord/lib/active_record/autosave_association.rb
+++ b/activerecord/lib/active_record/autosave_association.rb
@@ -35,7 +35,7 @@ module ActiveRecord
   #
   # === One-to-one Example
   #
-  #   class Post
+  #   class Post < ActiveRecord::Base
   #     has_one :author, autosave: true
   #   end
   #
@@ -76,7 +76,7 @@ module ActiveRecord
   #
   # When <tt>:autosave</tt> is not declared new children are saved when their parent is saved:
   #
-  #   class Post
+  #   class Post < ActiveRecord::Base
   #     has_many :comments # :autosave option is not declared
   #   end
   #
@@ -95,20 +95,23 @@ module ActiveRecord
   # When <tt>:autosave</tt> is true all children are saved, no matter whether they
   # are new records or not:
   #
-  #   class Post
+  #   class Post < ActiveRecord::Base
   #     has_many :comments, autosave: true
   #   end
   #
   #   post = Post.create(title: 'ruby rocks')
   #   post.comments.create(body: 'hello world')
   #   post.comments[0].body = 'hi everyone'
-  #   post.save # => saves both post and comment, with 'hi everyone' as body
+  #   post.comments.build(body: "good morning.")
+  #   post.title += "!"
+  #   post.save # => saves both post and comments.
   #
   # Destroying one of the associated models as part of the parent's save action
   # is as simple as marking it for destruction:
   #
-  #   post.comments.last.mark_for_destruction
-  #   post.comments.last.marked_for_destruction? # => true
+  #   post.comments # => [#<Comment id: 1, ...>, #<Comment id: 2, ...]>
+  #   post.comments[1].mark_for_destruction
+  #   post.comments[1].marked_for_destruction? # => true
   #   post.comments.length # => 2
   #
   # Note that the model is _not_ yet removed from the database: