We can just require the file rather than going through the autoload
indirection

Extend the solution from the fix for #12163 to the general case where
`Time` methods are wrapped with a time zone.

Fixes #12596.

Updated association_basics.md

Document default trim mode for Erubis and affected ERB tags. Fixes #12963 [ci skip]

Associations now raises `ArgumentError` on name conflicts. Closes #13217.

Fixes #12963

Remove unused variable.

Updated association_basics.md to include how to write migrations for self joins

Update association_basics.md

Corrected the update

Update association_basics.md

Typo fix

Changed :employee to :manager

Dangerous association names conflicts include instance or class
methods already defined by `ActiveRecord::Base`.

Let `unscope` ignore non Arel scope.where_values

Fix regression on .select method

Add CreateMigration action

This was a common pattern:
```
query = author.posts.select(:title)
connection.select_one(query)
```

However `.select` returns a ActiveRecord::AssociationRelation, which has
the bind information, so we can use that to get the right sql query.

Also fix select_rows on postgress and sqlite3 that were not using the binds

[fixes #7538]
[fixes #12017]
[related #13731]
[related #12056]

Replace Post model with Article model in getting started guide [ci skip]

Add `travel_back` to remove stubs from `travel` and `travel_to` and remove auto-rollback after each test case

This behavior is only work out-of-box with minitest and also add a
downside to run after each test case, even if we don't used the travel
or travel_to methods

find_in_batches should not mutate its argument

There is no gain in `referencing` tables that are not used for preloading.
Furthermore it will break if polymorphic associations are invloved. This
is because `references_eager_loaded_tables?` uses all `reference_values`
to decide wether to `eager_load` or `preload`.

Modify the session serializer implementation

Rename allowed options to :marshal and :json, for custom serializers
only allow the use of custom classes.

Alternative implementation to make time travel not dependent on mocha

Enhance errors while retrieving database config

Fixing issue with activerecord serialization not being able to dump a record after loading it from YAML - fixes #13861

Added some style changes in asset pipeline documentation