Added test for case when view doesn't have logger method when using ActionController::Metal controller.

Closes #6675

This happens when A has_many many B and A accepts_nested_attributes B that has a numeric colum
with initial 0 value. So a.update_attributes({:b_attributes => { :id => b.id, :numeric => 'foo' }})
passes the validation test but, the value of :numeric doesn't change.
his commit forces that the update fails with the above conditions.

Fixes #6393
Fixes #2331

Added `stored_attributes` hash which contains the attributes stored using
ActiveRecord::Store. This allows you to retrieve the list of attributes
you've defined.

    class User < ActiveRecord::Base
      store :settings, accessors: [:color, :homepage]
    end

    User.stored_attributes[:settings] # [:color, :homepage]

This allows you to retrieve the list of attributes you've defined.
Usable for e.g. selects in the view, or interators based on the
attributes you wish to store in the serialized column.

The problem:
Accessing a HashWithIndifferentAccess does not return the the same object
that is stored in the hash (i.e. equal?) causing unexpected results:

    hash = HashWithIndifferentAccess.new {|h, k| h[k] = []}
    hash[:a] << 1  # => [1]
    hash[:a]       # => [], expected [1]

The cause:
When a block is provided to generate default values the generated values
are duped if they are arrays. The duped value is stored in the hash but
the original value is returned when the hash is accessed.

The fix:
The duping is there for allowing frozen arrays containing hashes to be
modified. The fix restricts the duping to this case. Note that if default
function generates a frozen array an error will be raised on assignment
before and after the patch.

Closes #3811

make events not use date and time to determine parent_of. fixes #5932

Removing composed_of

This feature adds a lot of complication to ActiveRecord for dubious
value. Let's talk about what it does currently:

class Customer < ActiveRecord::Base
  composed_of :balance, :class_name => "Money", :mapping => %w(balance amount)
end

Instead, you can do something like this:

    def balance
      @balance ||= Money.new(value, currency)
    end

    def balance=(balance)
      self[:value] = balance.value
      self[:currency] = balance.currency
      @balance = balance
    end

Since that's fairly easy code to write, and doesn't need anything
extra from the framework, if you use composed_of today, you'll
have to add accessors/mutators like that.

Closes #1436
Closes #2084
Closes #3807

 ORA-02289: sequence does not exist for `SELECT "BLACK_JOKES_SEQ".NEXTVAL FROM dual`

to avoid ORA-02289: sequence does not exist
for `SELECT "BLACK_JOKES_SEQ".NEXTVAL FROM dual`

Closes #6754

Closes #6697

Based on examples seen in the Rails test suite. [ci skip]

fix invalid syntax and sqlite rake failing tests

add :nodoc: to AR::Tasks and update to follow the coding conventions

Fix build: check if sqlite3 file exists before remove

Get logic out of db rake tasks, and into classes and objects

bump AS deprecation_horizon to 4.1

Now isn't that better?

And yes, I know that private has no impact on class methods - it's a visual distinction, not a technical one.

Bump tzinfo gem.

Avoid unnecessary catching of Exception instead of StandardError.