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Building on the work of #13427 this PR adds a helpful error message to the adapters: mysql, mysql2, and sqlite3
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Always pass in the column for quote_bound_value and quote using it in
case it exists there.
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Fixes #12261. Closes #12395.
Conflicts:
activerecord/CHANGELOG.md
activerecord/test/cases/adapters/postgresql/array_test.rb
activerecord/test/cases/adapters/postgresql/json_test.rb
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The code uses these checks in several places to know what to do with a
particular column, for instance AR attribute query methods has a branch
like this:
if column.number?
!value.zero?
end
This should never be true for array columns, since it would be the same
as running [].zero?, which results in a NoMethodError exception.
Fixing this by ensuring that array columns in PostgreSQL never return
true for number?/text? checks.
Since most of the array support was based on the postgres_ext lib, it's
worth noting it does the same thing for numeric array columns too:
https://github.com/dockyard/postgres_ext/blob/v1.0.0/lib/postgres_ext/active_record/connection_adapters/postgres_adapter.rb#L72
This extended the same logic for text columns to ensure consistency.
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Currently if you attempt to use a database that does not exist you get an error:
```
PG::ConnectionBad FATAL: database "db_error" does not exist
```
The solution is easy, create and migrate your database however new developers may not know these commands by memory. Instead of requiring the developer to search for a solution, tell them how to fix the problem in the error message:
```
ActiveRecord::NoDatabase: FATAL: database "db_error" does not exist
Run `$ bin/rake db:create db:migrate` to create your database
```
Active Record should not know about `rake db:migrate` so this additional information needs to come from the railtie. Potential alternative implementation suggestions are welcome.
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Fixes: #13445
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Previously, executing an insert SQL in PostgreSQL with a command like this:
insert into articles(
number)
values(
5152
)
would not work because the adapter was unable to extract the correct articles table name.
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This change was necessary because the whitelist wouldn't work.
It would be painful for users trying to update their applications.
This blacklist intent to prevent odd bugs and confusion in code that call mutator
methods directely on the `Relation`.
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Using the name of an association in `where` previously worked only
if the value was a single `ActiveRecrd::Base` object. e.g.
Post.where(author: Author.first)
Any other values, including `nil`, would cause invalid SQL to be
generated. This change supports arguments in the `where` query
conditions where the key is a `belongs_to` association name and the
value is `nil`, an `Array` of `ActiveRecord::Base` objects, or an
`ActiveRecord::Relation` object.
# Given the Post model
class Post < ActiveRecord::Base
belongs_to :author
end
# nil value finds records where the association is not set
Post.where(author: nil)
# SELECT "posts".* FROM "posts" WHERE "posts"."author_id" IS NULL
# Array values find records where the association foreign key
# matches the ids of the passed ActiveRecord models, resulting
# in the same query as Post.where(author_id: [1,2])
authors_array = [Author.find(1), Author.find(2)]
Post.where(author: authors_array)
# ActiveRecord::Relation values find records using the same
# query as Post.where(author_id: Author.where(last_name: "Emde"))
Post.where(author: Author.where(last_name: "Emde"))
Polymorphic `belongs_to` associations will continue to be handled
appropriately, with the polymorphic `association_type` field added
to the query to match the base class of the value. This feature
previously only worked when the value was a single `ActveRecord::Base`.
class Post < ActiveRecord::Base
belongs_to :author, polymorphic: true
end
Post.where(author: Author.where(last_name: "Emde"))
# Generates a query similar to:
Post.where(author_id: Author.where(last_name: "Emde"), author_type: "Author")
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support creating temporary tables from queries
Conflicts:
activerecord/CHANGELOG.md
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also override drop_table in AbstractMySQLAdapter to properly drop
temporary tables without committing the transaction
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db:test:clone and db:test:prepare use
ActiveRecord::Base. configurations, so we need to load the rails
environment, otherwise the config wont be in place.
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For PG adapters with custom expression and grouped result
of aggregate functions have not found correct column type
for it. Extract column type from query result.
Closes: #13230
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Example: Given you have a comments model with a polymorphic commentable
association (e.g. books and songs) with the touch option set.
Every time you update a comment its commentable should be touched.
This was working when you changed attributes on the comment or when you
moved the comment from one book to another. However, it was not working
when moving a comment from a book to a song. This is now fixed.
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skip]
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Closes #7441
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Closes #13146.
This fixes an error when using:
```
change_colum :table, :column, :bigint, array: true
```
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already have cache true.
This commit takes into account the last cache_enabled value, before clearing query_cache.
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Fixture files are passed through an ERB renderer before being read as
YAML. The rendering is currently done in the context of the main object,
so method definitons leak into other fixtures, and there is no clean
place to define fixture helpers.
After this commit, the ERB renderer will use a new subclass of
ActiveRecord::FixtureSet.context_class each time a fixture is rendered.
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Previously, the `has_one` macro incorrectly accepts the `counter_cache` option
due to a bug, although that options was never supported nor functional on
`has_one` and `has_one ... through` relationships. It now correctly raises an
`ArgumentError` when passed that option.
For reference, this bug was introduced in 52f8e4b9.
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also clarify native rename_index support is >= 5.7, not > 5.7
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Extract **notable changes**, **deprecations** and **removals** from
each CHANGELOG.
I tried to reference the commits and pull requests for new features
and deprecations.
In the process I also made some minor changes to the CHANGELOGS.
The 4_1_release_notes guide is declared WIP.
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laurocaetano/fix-uniqueness-validation-for-aliased-attribute
Fix bug when validating the uniqueness of an aliased attribute.
Conflicts:
activerecord/CHANGELOG.md
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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.
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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`.
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Also make Action Mailer changelog format more consistent with the
others [ci skip]
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I'm pretty confused about the addition of this method. The documentation
says that it was intended to allow the removal of values from the
default scope (in contrast to #except). However it behaves exactly the
same as except: https://gist.github.com/jonleighton/7537008 (other than
having a slightly enhanced syntax).
The removal of the default scope is allowed by
94924dc32baf78f13e289172534c2e71c9c8cade, which was not a change we
could make until 4.1 due to the need to deprecate things. However after
that change #unscope still gives us nothing that #except doesn't already
give us.
However there *is* a desire to be able to unscope stuff in a way that
persists across merges, which would allow associations to be defined
which unscope stuff from the default scope of the associated model. E.g.
has_many :comments, -> { unscope where: :trashed }
So that's what this change implements. I've also corrected the
documentation. I removed the guide references to #except as I think
unscope really supercedes #except now.
While we're here, there's also a potential desire to be able to write
this:
has_many :comments, -> { unscoped }
However, it doesn't make sense and would not be straightforward to
implement. While with #unscope we're specifying exactly what we want to
be removed from the relation, with "unscoped" we're just saying that we
want it to not have some things which were added earlier on by the
default scope. However in the case of an association, we surely don't
want *all* conditions to be removed, otherwise the above would just
become "SELECT * FROM comments" with no foreign key constraint.
To make the above work, we'd have to somehow tag the relation values
which get added when evaluating the default scope in order to
differentiate them from other relation values. Which is way too much
complexity and therefore not worth it when most use cases can be
satisfied with unscope.
Closes #10643, #11061.
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This fixes a bug when merging relations of different classes.
```
Given:
Post.joins(:author).merge(Author.order(name: :desc)).to_sql
Before:
SELECT "posts".* FROM "posts"
INNER JOIN "authors" ON "authors"."id" = "posts"."author_id"
ORDER BY "posts"."name" DESC
After:
SELECT "posts".* FROM "posts"
INNER JOIN "authors" ON "authors"."id" = "posts"."author_id"
ORDER BY "authors"."name" DESC
```
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This reverts commit 22f80ae57b26907f662b7fd50a7270a6381e527e.
See
https://github.com/rails/rails/commit/22f80ae57b26907f662b7fd50a7270a6381e527e#commitcomment-4640676
Conflicts:
activerecord/CHANGELOG.md
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Checks to see if the record contains the foreign_key to set the inverse automatically
Conflicts:
activerecord/CHANGELOG.md
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automatically
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Explicitly exit with status "1" for create and drop task failures
Conflicts:
activerecord/CHANGELOG.md
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