Got all the tests passing again.
Support for `encode_json` has been removed (and consequently the
ability to encode `BigDecimal`s as numbers, as mentioned in the
previous commit). Install the `activesupport-json_encoder` gem
to get it back.
This is because the new encoder will no longer support encode_json.
Therefore our only choice is to return `to_i` or `to_s` in
`BigDecimal#as_json`. Since casting a BigDecimal to an integer is
most likely a lossy operation, we chose to encode it as a string.
Support for encoding BigDecimal as a string will return via the
`activesupport-json_encoder` gem.
This prevents the following error when a MySQL index on a foreign key
column is renamed:
```
ActiveRecord::StatementInvalid: Mysql2::Error: Cannot drop index 'index_engines_on_car_id': needed in a foreign key constraint: DROP INDEX `index_engines_on_car_id` ON `engines`
```
refs: #13038.
Fixes#12812
Raise `ActiveRecord::RecordNotDestroyed` when a child marked with
`dependent: destroy` can't be destroyed.
The following code:
```ruby
class Post < ActiveRecord::Base
has_many :comments, dependent: :destroy
end
class Comment < ActiveRecord::Base
before_destroy do
return false
end
end
post = Post.create!(comments: [Comment.create!])
post.comments = [Comment.create!]
````
would result in a `post` with two `comments`.
With this commit, the same code would raise a `RecordNotDestroyed`
exception, keeping the `post` with the same `comment`.
This reverts commit f4a5a9ea4d183f4102796215d4502c46dbe3e52b, reversing
changes made to 7ccb482181ee6c47c765406009018a15172812de.
Reason:
The logic is different, the first call to #option_value_selected? is for
the :selected option (the argument is the "selected" variable), the second
call is for the :disabled option (the argument is the "disabled" variable).
Before Rubinius 2.2.0, some parts of the stdlib were lazily loaded, even
if not included in the Gemfile. Now it's 100% required to include the
gem 'rubysl', otherwise the stdlib is not available entirely, breaking
everything.
Also, the rubysl-test-unit gem was depending on minitest ~> 4.7, thus causing
conflicts with Rails's dependency on minitest 5. That is not the case
anymore since rubysl-test-unit 2.0.2, so it is completely safe to
include it fully.
When Travis is going to update RVM to 1.24, it'll be safe to use rbx-2,
thus picking new versions automatically.
Previous behaviour was MRI-dependent, now we're making sure the message
is correctly shown: something that can be relyied upon across every
Ruby implementation.
