rails/CHANGELOG.md at 483c301e0a132a6415355be2296fb932d07bd1c5

Johnny Holton 483c301e0a destroys association records before saving/inserting new association records

fixes bug introduced by  #3329
These are the conditions necessary to reproduce the bug:
- For an association, autosave => true.
- An association record is being destroyed
- A new association record is being created.
- There is a unique index one of the association's fields.
- The record being created has the same value as the record being
destroyed on the indexed field.

Before, the deletion of records was postponed until after all
insertions/saves.  Therefore the new record with the identical value in
the indexed field caused a non-unique value error to be thrown at the database
level.

With this fix, the deletions happen first, before the insertions/saves.
Therefore the record with the duplicate value is gone from the database
before the new record is created, thereby avoiding the non-uniuqe value
error.

2013-05-02 03:27:06 -04:00

1.4 KiB

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fixes bug introduced by #3329. Now, when autosaving associations, deletions happen before inserts and saves. This prevents a 'duplicate unique value' database error that would occur if a record being created had the same value on a unique indexed field as that of a record being destroyed.

Johnny Holton
Handle aliased attributes in ActiveRecord::Relation.

When using symbol keys, ActiveRecord will now translate aliased attribute names to the actual column name used in the database:

With the model
```
class Topic
  alias_attribute :heading, :title
end
```
The call
```
Topic.where(heading: 'The First Topic')
```
should yield the same result as
```
Topic.where(title: 'The First Topic')
```
This also applies to ActiveRecord::Relation::Calculations calls such as Model.sum(:aliased) and Model.pluck(:aliased).

This will not work with SQL fragment strings like Model.sum('DISTINCT aliased').

Godfrey Chan
Mute psql output when running rake db:schema:load.

Godfrey Chan
Trigger a save on has_one association=(associate) when the associate contents have changed.

Fix #8856.

Chris Thompson
Abort a rake task when missing db/structure.sql like db:schema:load task.

kennyj

Please check 4-0-stable for previous changes.

1.4 KiB Raw Blame History

1.4 KiB

Raw Blame History