Allows you to do BaseClass.new(:type => "SubClass") as well as
parent.children.build(:type => "SubClass") or parent.build_child
to initialize an STI subclass. Ensures that the class name is a
valid class and that it is in the ancestors of the super class
that the association is expecting.

All tests with a custom inheritance_column use the `Vegtable` model.
The field ruby_type on the Company models is no longer needed

It's not really a good idea to have this as a global config option. We
should allow people to specify the behaviour per association.

There will now be two new values:

* :dependent => :restrict_with_exception implements the current
  behaviour of :restrict. :restrict itself is deprecated in favour of
  :restrict_with_exception.
* :dependent => :restrict_with_error implements the new behaviour - it
  adds an error to the owner if there are dependent records present

See #4727 for the original discussion of this.

This reverts commit 3803fcce.

Conflicts:
	activerecord/CHANGELOG.md

It will be deprecated only in 4.0, and removed properly in 4.1.

Change CollectionProxy#method_missing to use scoped.public_send, to
avoid a problem described in issue #2508 when trying to use class
methods with names like "open", that clash with private kernel methods.
Also changed the dynamic matcher instantiator to send straight to
scoped, to avoid another roundtrip to method_missing.

See the CHANGELOG for details.

Fixes #950.

This is to avoid confusing newbies, and to be consistent with the fact
that other options like :foreign_key already allow a symbol or a string.

Add interpolation of association conditions back in, in the form of proc { ... } rather than instance_eval-ing strings

Construct an actual ActiveRecord::Relation object for the association scope, rather than a hash which is passed to apply_finder_options. This allows more flexibility in how the scope is created, for example because scope.where(a, b) and scope.where(a).where(b) mean different things.

This required changing the code to keep the association proxy for a belongs_to around, despite its target being nil. Which in turn required various changes to the way that stale target checking is handled, in order to support various edge cases (loaded target is nil then foreign key added, foreign key is changed and then changed back, etc). A side effect is that the code is nicer and more succinct.

Note that I am removing test_no_unexpected_aliasing since that is basically checking that the proxy for a belongs_to *does* change, which is the exact opposite of the intention of this commit. Also adding various tests for various edge cases and related things.

Phew, long commit message!

Verify that when has_many associated objects are destroyed via :dependent => :destroy, when the parent is destroyed, the callbacks are run

Convert :primary_key in association to a string before comparing to column names, so that for example :primary_key => :another_pk works as well [#5605 state:resolved]

Signed-off-by: NJosé Valim <jose.valim@gmail.com>

Simplify calculation scope building. Remove :order from associations as it is troublesome w/ calculation methods using postgresql.

Signed-off-by: NMichael Koziarski <michael@koziarski.com>

Make has_one with :conditions hash scope build or creation of the associated object with those conditions
Signed-off-by: NMichael Koziarski <michael@koziarski.com>
[#3088 state:committed]

Fix has_one with foreign_key and primary_key association bug which caused the associated object being lost when saving the owner. [#1756 state:resolved]

Mixed in a bit from patch by ransom-briggs. [#2813 state:resolved]
Signed-off-by: NEloy Duran <eloy.de.enige@gmail.com>

Explicitely setting `autosave => false' should override new_record autosaving. [#2214 state:resolved]

Original author is Jacob.

Changed ActiveRecord to use new callbacks and speed up observers by only notifying events that are actually being consumed.
Signed-off-by: NJoshua Peek <josh@joshpeek.com>

[#2934 state:committed]
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

Oracle stores '' string as NULL
Oracle cannot have identifiers larger than 30 characters
added missing fixtures to test setup method

[#765 state:committed]
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

Revert "Revert "Generate proper :counter_sql from :finder_sql when there is a newline character immediately following 'SELECT' [#2118 state:resolved]""

This reverts commit 80f1f863.

The feature doesn't work on Postgres, so don't test it on Postgres.
Also, Postgres compatibility is irrelevant to the ticket/patch in question.

Revert "Generate proper :counter_sql from :finder_sql when there is a newline character immediately following 'SELECT' [#2118 state:resolved]"

This reverts commit 4851ca9e.

The tests do not pass for postgresql.

Generate proper :counter_sql from :finder_sql when there is a newline character immediately following 'SELECT' [#2118 state:resolved]
Signed-off-by: NPratik Naik <pratiknaik@gmail.com>

Deprecate Model#validate/validate_on_create/validate_on_update. Use Model.validate :method and likewise

Signed-off-by: NDavid Heinemeier Hansson <david@loudthinking.com>

Ensure replacing has_one associations respects the supplied :dependent option. [#1305 state:resolved]
Signed-off-by: NPratik Naik <pratiknaik@gmail.com>