activerecord/lib/active_record/associations.rb states:
# [association=(associate)]
# Assigns the associate object, extracts the primary key, sets it as the foreign key,
# and saves the associate object.
Since commit 42dd5d9f2976677a4bf22347f2dde1a8135dfbb4 to fix#7191, this
is no longer the case if the associate has changed, but is the same
object. For example:
# Pirate has_one :ship
pirate = Pirate.create!(catchphrase: "A Pirate")
ship = pirate.build_ship(name: 'old name')
ship.save!
ship.name = 'new name'
pirate.ship = ship
That last line should trigger a save. Although we are not changing the
association, the associate (ship) has changed.
This commit fixes a regression bug in which counter_cache columns
were not being updated correctly when newly created records were
being pushed into an assocation. EG:
# this was fine
@post.comment.create!
# this was fine
@comment = Comment.first
@post.comments << @comment
# this would not update counters
@post.comments << Comment.create!
Object#respond_to? returns singletons and thus we inherit that contract.
The implementation of the predicate is good, but the test is only
checking boolean semantics, which in this case is not enough.
fixes#4208
If a query selects only a few columns and gives custom names to
those columns then respond_to? was returning true for the non
selected columns. However calling those non selected columns
raises exception.
post = Post.select("'title' as post_title").first
In the above case when `post.body` is invoked then an exception is
raised since `body` attribute is not selected. Howevere `respond_to?`
did not behave correctly.
pos.respond_to?(:body) #=> true
Reason was that Active Record calls `super` to pass the call to
Active Model and all the columns are defined on Active Model.
Fix is to actually check if the data returned from the db contains
the data for column in question.
This reverts commit e8727d37fc49d5bf9976c3cb5c46badb92cf4ced, reversing
changes made to d098e1c24bc145e0cc14532348436e14dc46d375.
Reason: it broke the mysql build
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.
This reverts commit 521035af530482d6d9ad2dae568eaeb0ab188e1c, reversing
changes made to 222011dbee842bbc60d3aaaa3145356b90a30fd1.
Reason: This broke the tests
Previously, freezing a cloned ActiveRecord object froze the original
too. By cloning `@attributes` before freezing, we prevent cloned objects
(which in Ruby share state of ivars) from being effected by `#freeze`.
Resolves issue #4936, which has further information on this issue, as
well as steps to reproduce.
* Add a test case for `#freeze` not causing `cloned.frozen?` to be true.
* Clone @attributes before freezing in `ActiveRecord::Core`, then
reassign the cloned, frozen hash to the frozen model's `@attributes`
ivar.
/cc @steveklabnik
Existing code was delegating to the instance with delegate
macro calls, or invoking the instance method to reach
the object and call its instance methods.
But the point is to have a clean class-level interface where
the thread local instance is hidden in the implementation.
References #11c6973.
References #10198.
This reverts commit 9bf1a0db4acbbf9e8e6f707250269185224e7efe, reversing
changes made to fed97091b9546d369a240d10b184793d49247dd3.
Conflicts:
activerecord/test/cases/transaction_callbacks_test.rb
Reason: This fix introduces another issue described at #8937, so we are
reverting it to restore the behavior of 3-2-stable.
We will fix both issues when we come out with a better solution
Fixes#3002. Also see #5494.
```
class Comment < ActiveRecord::Base
belongs_to :post
end
class Author < ActiveRecord::Base
has_many :posts
end
class Post < ActiveRecord::Base
belongs_to :author
has_many :comments
end
```
`Comment.joins(:post).merge(Post.joins(:author).merge(Author.where(:name => "Joe Blogs"))).all` would
fail with `ActiveRecord::ConfigurationError: Association named 'author' was not found on Comment`.
It is failing because `all` is being called on relation which looks like this after all the merging:
`{:joins=>[:post, :author], :where=>[#<Arel::Nodes::Equality: ....}`. In this relation all the context that
`Post` was joined with `Author` is lost and hence the error that `author` was not found on `Comment`.
Ths solution is to build JoinAssociation when two relations with join information are being merged. And later
while building the arel use the previously built `JoinAssociation` record in `JoinDependency#graft` to
build the right from clause.
Thanks to Jared Armstrong (https://github.com/armstrjare) for most of the work. I ported it to make it
compatible with new code base.
