Added missing active record configurations.
[ci skip] Correct the explanation of the example for find_or_create_by when used with create_with in ActiveRecord Querying guide
Getting Started Guide: posts_controller -> PostsController [ci skip]
keep preloaded records in a list rather than extract from a hash
always populate the preloaded records instance variable so we can remove
the @associated_records_by_owner ivar
hash insertion order doesn't matter anymore, so only loop over the
owners once
extract association resetting to a method
remove initialize method
Make sure inverse_of is visible on the has_many callbacks
Merge branch 'master' into preload

* master: (62 commits)
  Getting Started Guide: Hello Rails! -> Hello, Rails! and wrap code tag
  Add CHANGELOG entry for #12344
  Add regression test to #12343
  Fix typo in number_to_human docs: you -> your
  [Documentation] Add a missing validation to I18n docs
  Use the given name in html_options for the hidden field in collection_check_boxes
  assign_attributes should return if argument is blank.
  No need the else clause
  Use join to concat the both side of the AST
  Add a CHANGELOG entry about Web Console inclusion
  added column type to example in section 2.3
  Include web-console in new projects Gemfile
  ActiveRecord::ConnectionAdapters::Column.string_to_time method respects string with timezone. Closes #12278.
  add test_scoped_root_as_name
  Getting Started Guide: update RubyGems Guides link [ci skip]
  Deprecate unused quoted_locking_column method.
  Update references to wycats/thor to erikhuda/thor.
  bcrypt-ruby v3.1.2 supports Ruby 2.0 on Windows
  Fix the model name in the association basics guides
  We shouldn't override PostgreSQLAdapter's superclass inheritance while monkeypatching
  ...
update changelog for #12359
Merge pull request #12359 from arthurnn/inverse_on_callbacks

Make sure inverse_of is visible on the has_many callbacks
fix .find when inverse is set

.find([1]) should return an Array of entries, even when a invese object is in memory already
changelog entry
Fix small typo in docs
Merge pull request #12362 from arthurnn/inverse_on_find

fix .find when inverse is loaded
Merge pull request #12363 from jbaudanza/doc

Fix small typo in docs
Getting Started Guide: update link_to string argument to use single-quote mark, following document style [ci skip]
Merge pull request #12368 from francisgo/patch-5

Getting Started Guide: update link_to string argument to use single-quote [ci skip]
Merge pull request #12355 from speakingcode/doc-fix

Correct error in ActiveRecord Querying guide [ci skip]