I think we are better off leaving `sudo` outside of the documented
way of installing gems (`activerecord`, `actionpack`, …).
We don’t want newbies to think that `sudo` is required or, even worse, than
they actually have to type `[sudo] gem install`.
In most scenarios, `sudo` is not needed to install gems, and people who do
need it, probably already know about it.
What do you think? 😁
The test was skipped because of an issue that, in the meantime,
has been fixed: https://github.com/rubinius/rubinius/issues/3328.
Using the latest Rubinius (the one currently on Travis CI), this
is the result:
```sh
$ ruby --version
rubinius 2.5.3 (2.1.0 2482b093 2015-05-10 3.5.1 JI) [x86_64-darwin14.3.0]
```
**Before this PR**
```sh
$ ruby -Itest test/cases/attribute_assignment_test.rb
Run options: --seed 58569
.....S...
Finished in 0.048278s, 186.4203 runs/s, 269.2738 assertions/s.
9 runs, 13 assertions, 0 failures, 0 errors, 1 skips
You have skipped tests. Run with --verbose for details.
```
**After this PR**
$ ruby -Itest test/cases/attribute_assignment_test.rb
Run options: --seed 35720
.........
Finished in 0.029441s, 305.6961 runs/s, 475.5273 assertions/s.
9 runs, 14 assertions, 0 failures, 0 errors, 0 skips
```
`ActiveModel::Dirty#[attr_name]_previous_change` to improve access
to recorded changes after the model has been saved.
It makes the dirty-attributes query methods consistent before and after
saving.
As demonstrated by #19570, this option is severely limited, and
satisfies an extremely specific use case. Realistically, there's not
much reason for this option to exist. Its functionality can be trivially
replicated with a normal Ruby method. Let's deprecate this option, in
favor of the simpler solution.
Rails 5.0 changes to ActiveModel::Errors include addition of `details`
that also accidentally changed the return value of `delete`. Since
there was no test for that behavior it went unnoticed. This commit
adds a test and fixes the regression.
Small improvements to comments have also been made. Since `get` is
getting deprecated it is better to use `[]` in other methods' code
examples. Also, in the module usage example, `def Person.method`
was replaced with a more commonly used `def self.method` code style.
Deprecation messages in ActiveModel::Errors are using String#squish
from ActiveSupport but were not explicitly requiring it, causing failures
when used outside rails.
The name `ActiveModel::AttributeAssignment::UnknownAttributeError` is
too implementation specific so let's move the constant directly under
the ActiveModel namespace.
Also since this constant used to be under the ActiveRecord namespace, to
make the upgrade path easier, let's avoid raising the former constant
when we deal with this error on the Active Record side.
Previously, calling `User.model_name.to_json` would result in an infinite
recursion as `.model_name` inherited its `.as_json` behavior from Object. This
patch fixes that unexpected behavior by delegating `.as_json` to :name.
