| Commit message (Collapse) | Author | Age | Files | Lines |
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Alias left_joins to left_outer_joins
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we should be using a countdown latch instead of rolling our own
busy-loop.
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samphilipd/sam/manual_locking_on_schema_migrations
Make migrations concurrent safe (using advisory locks)
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- Addresses issue #22092
- Works on Postgres and MySQL
- Uses advisory locks because of two important properties:
1. The can be obtained outside of the context of a transaction
2. They are automatically released when the session ends, so if a
migration process crashed for whatever reason the lock is not left
open perpetually
- Adds get_advisory_lock and release_advisory_lock methods to database
adapters
- Attempting to run a migration while another one is in process will
raise a ConcurrentMigrationError instead of attempting to run in
parallel with undefined behavior. This could be rescued and
the migration could exit cleanly instead. Perhaps as a configuration
option?
Technical Notes
==============
The Migrator uses generate_migrator_advisory_lock_key to build the key
for the lock. In order to be compatible across multiple adapters there
are some constraints on this key.
- Postgres limits us to 64 bit signed integers
- MySQL advisory locks are server-wide so we have to scope to the
database
- To fulfil these requirements we use a Migrator salt (a randomly
chosen signed integer with max length of 31 bits) that identifies
the Rails migration process as the owner of the lock. We multiply
this salt with a CRC32 unsigned integer hash of the database name to
get a signed 64 bit integer that can also be converted to a string
to act as a lock key in MySQL databases.
- It is important for subsequent versions of the Migrator to use the
same salt, otherwise different versions of the Migrator will not see
each other's locks.
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This assumes only one query was ever executed, but it appears to
sometimes be loading schema information. We can just look at the array
of queries, rather than the "first" one that was run
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added ActiveRecord::Relation#outer_joins
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Example:
User.left_outer_joins(:posts)
=> SELECT "users".* FROM "users" LEFT OUTER JOIN "posts" ON "posts"."user_id" = "users"."id"
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Before this commit, if
`ActiveRecord::Base.belongs_to_required_by_default` is set to `true`,
then creating a record through `has_and_belongs_to_many` fails with the
cryptic error message `Left side must exist`. This is because
`inverse_of` isn't working properly in this case, presumably since we're
doing trickery with anonymous classes in the middle.
Rather than following this rabbit hole to try and get `inverse_of` to
work in a case that we know is not publicly supported, we can just turn
off this validation to match the behavior of 4.2 and earlier.
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Support SQL sanitization in AR::QueryMethods#order
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Add support for sanitizing arrays in SQL ORDER clauses.
This is useful when using MySQL `ORDER BY FIELD()` to return records in
a predetermined way.
```ruby
Tag.order(['field(id, ?', [1,3,2]].to_sql
# => SELECT "tags".* FROM "tags" ORDER BY field(id, 1,3,2)
```
Prior to this, developers must be careful to sanitize `#order` arguments
themselves.
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This is part of a refactoring to make it easier to allow `order` to use
sanitize like just about everything else on relation. The deleted test
doesn't give any reasoning as to why passing `nil` to `order` needs to
be supported, and it's rather nonsensical. I can almost see allowing an
empty string being passed (though I'm tempted to just disallow it...)
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default value for FixtureSet.fixture_class_names ought to be a Class
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Look at `TestFixtures.set_fixture_class`. As documented, it
accepts a mapping of fixture identifiers (string or symbol) to Classes
(the model classes that implement the named fixture).
Look now at the initialization of `TestFixtures.fixture_class_names`.
It defines a Hash, which will return a string by default (where the
string is the estimated class name of the given fixture identifier).
Now look at TestFixtures.load_fixtures. It calls `FixtureSet.create_fixtures`,
passing in the mapping of `fixture_class_names`.
Following this on to `FixtureSet.create_fixtures`, this instantiates a
`FixtureSet::ClassCache`, passing in the map of class names.
`ClassCache`, in turn, calls `insert_class` for each value in the cache.
(Recall that `set_fixture_class` puts Class objects in there, while the
default proc for the mapping puts String objects.)
Look finally at `insert_class`. If the value is present, it checks to
see if the value is a subclass of `AR::Base`. Fair enough...but wait!
What if the value is a String? You get an exception, because a String
instance cannot be compared with a Class.
Judging from the implementation, it seems like the expected behavior
here is for `fixture_class_names` to have no default proc. Look-ups are
supposed to happen via `ClassCache`, with `fixture_class_names` existing
solely as a repository for explicitly-registered class mappings.
That is what this change does.
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akihiro17/fix-preload-association""
This reverts commit 5243946017d09afff4d70d273b0fcdfd41a4b22a.
This fixes an issue with the build where tests would fail on mysql and
postgresql due to different ordering.
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This reverts commit 6dc6a0b17cfaf7cb6aa2b1c163b6ca141b538a8e, reversing
changes made to ec94f00ba3cf250eb54fc5b7a5e3ed4b90164f34.
This pull request broke the build.
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DRY up STI subclass logic
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The first one is quite straightforward. We want to give the proper error
message in the case where a top level constant exists, but we're looking
for a nested one. We just need to port over the change to use
`subclass.name` into these changes.
The second set of failures, which are only present in the mysql adapter
tests, are stranger to me. The failure occurs because we were
previously comparing `subclass.name == self.name` instead of `subclass
== self`. However, I don't think that we need to support creating
anonymous classes which share a table with a class that uses STI,
overrides `name` to return the same name as athe class that we have no
other relationship with, when not assigned to a constant so it could
never be used anyway...
The commits around why that exist give no context, and I think they're
just poorly written tests (WTF does `test_schema` mean anyway, and why
does calling `.first` on some anonymous class test it?). We'll just
disable STI on that class.
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I'm making this commit separately because this has failing tests and
style nitpicks that I'd like to make as individual commits, to make the
changes I'm making explicit.
We still want a single merge commit at the end, however.
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the newer method used for discriminating new records did not
use the older and more robust method used for instantiating
existing records, but did have a better post-check to ensure
the sublass was in the hierarchy. so move the descendants check
to find_sti_class, and then simply call find_sti_class from
subclass_from_attributes
now with fixed specs
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We should call `scope.order!` and set `scope.reordering_value` to `true` if :reordering values are specified
Fixes #21886
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This solves the following issue:
```
$ bin/test
Using sqlite3
/Users/senny/Projects/rails/activerecord/test/cases/adapters/mysql2/sp_test.rb:16:in `<class:Mysql2StoredProcedureTest>': undefined method `version' for #<ActiveRecord::ConnectionAdapters::SQLite3Adapter:0x007f8bab4b5b70> (NoMethodError)
from /Users/senny/Projects/rails/activerecord/test/cases/adapters/mysql2/sp_test.rb:5:in `<top (required)>'
from /Users/senny/Projects/rails/activesupport/lib/active_support/dependencies.rb:302:in `require'
from /Users/senny/Projects/rails/activesupport/lib/active_support/dependencies.rb:302:in `block in require'
from /Users/senny/Projects/rails/activesupport/lib/active_support/dependencies.rb:268:in `load_dependency'
from /Users/senny/Projects/rails/activesupport/lib/active_support/dependencies.rb:302:in `require'
from /Users/senny/Projects/rails/railties/lib/rails/test_unit/test_requirer.rb:11:in `block in require_files'
from /Users/senny/Projects/rails/railties/lib/rails/test_unit/test_requirer.rb:10:in `each'
from /Users/senny/Projects/rails/railties/lib/rails/test_unit/test_requirer.rb:10:in `require_files'
from /Users/senny/Projects/rails/railties/lib/rails/test_unit/minitest_plugin.rb:69:in `plugin_rails_init'
from /Users/senny/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/minitest-5.3.3/lib/minitest.rb:73:in `block in init_plugins'
from /Users/senny/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/minitest-5.3.3/lib/minitest.rb:71:in `each'
from /Users/senny/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/minitest-5.3.3/lib/minitest.rb:71:in `init_plugins'
from /Users/senny/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/minitest-5.3.3/lib/minitest.rb:122:in `run'
from bin/test:19:in `<main>'
```
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sebjacobs/support-bidirectional-destroy-dependencies
Add support for bidirectional destroy dependencies
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Prior to this commit if you defined a bidirectional relationship
between two models with destroy dependencies on both sides, a call to
`destroy` would result in an infinite callback loop.
Take the following relationship.
class Content < ActiveRecord::Base
has_one :content_position, dependent: :destroy
end
class ContentPosition < ActiveRecord::Base
belongs_to :content, dependent: :destroy
end
Calling `Content#destroy` or `ContentPosition#destroy` would result in
an infinite callback loop.
This commit changes the behaviour of `ActiveRecord::Callbacks#destroy`
so that it guards against subsequent callbacks.
Thanks to @zetter for demonstrating the issue with failing tests[1].
[1] rails#13609
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scambra/habtm-with-where-includes-16032-for-master
Includes HABTM returns correct size now
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only instantiates one HABTM object because the join table hasn't a primary key.
Updated commit from @bigxiang commit dbaa837
Fixes #16032.
Examples:
before:
Project.first.salaried_developers.size # => 3
Project.includes(:salaried_developers).first.salaried_developers.size # => 1
after:
Project.first.salaried_developers.size # => 3
Project.includes(:salaried_developers).first.salaried_developers.size # => 3
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This reverts commit 60c9701269f5b412849f1a507df61ba4735914d7, reversing
changes made to 6a25202d9ea3b4a7c9f2d6154b97cf8ba58403db.
Reason: Broken build
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This triggers the JoinDependency work to reflect on the associations
and trigger an error as follows:
ActiveRecord::ConfigurationError: Association named 'account' was
not found on Company; perhaps you misspelled it?
Fix Company.of_first_firm joins association name
Should be `Company.joins(:accounts)` not `Company.joins(:account)`.
Do the same for Client.of_first_firm
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Errors can be indexed with nested attributes
Close #8638
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`has_many` can now take `index_errors: true` as an
option. When this is enabled, errors for nested models will be
returned alongside an index, as opposed to just the nested model name.
This option can also be enabled (or disabled) globally through
`ActiveRecord::Base.index_nested_attribute_errors`
E.X.
```ruby
class Guitar < ActiveRecord::Base
has_many :tuning_pegs
accepts_nested_attributes_for :tuning_pegs
end
class TuningPeg < ActiveRecord::Base
belongs_to :guitar
validates_numericality_of :pitch
end
```
- Old style
- `guitar.errors["tuning_pegs.pitch"] = ["is not a number"]`
- New style (if defined globally, or set in has_many_relationship)
- `guitar.errors["tuning_pegs[1].pitch"] = ["is not a number"]`
[Michael Probber, Terence Sun]
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Explicitly exit with status "1" for create and drop failures
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* If the create task fails for a reason other than the database already
existing, processing should end. This is indicated by a non-zero exit
status.
* Since the backtrace is already printed to screen, we forgo printing it
again by using an explicit call to `exit`.
* :warning: This modifies the behavior of the db:create task slightly in
that the stack trace is no longer printed by default. If the `--trace`
option is used, it will print the trace _after_ the error message.
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rafaelsales/issues/21922-fix-ar-group-by-attribute-lookup
Fix generated projection fields in group by query
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Closes #21922
Let `Book(id, author_id)`, `Photo(id, book_id, author_id)` and `Author(id)`
Running `Book.group(:author_id).joins(:photos).count` will produce:
* Rails 4.2 - conflicts `author_id` in both projection and group by:
```sql
SELECT COUNT(*) AS count_all, author_id AS author_id
FROM "books" INNER JOIN "photos" ON "photos"."book_id" = "books"."id"
GROUP BY author_id
```
* Master (9d02a25) - conflicts `author_id` only in projection:
```sql
SELECT COUNT(*) AS count_all, author_id AS author_id
FROM "books" INNER JOIN "photos" ON "photos"."book_id" = "books"."id"
GROUP BY "books"."author_id"
```
* With this fix:
```sql
SELECT COUNT(*) AS count_all, "books"."author_id" AS books_author_id
FROM "books" INNER JOIN "photos" ON "photos"."book_id" = "books"."id"
GROUP BY "books"."author_id"
```
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This issue was resolved by #21687 already. But re-add args by #18856.
`#tables` extra args was only using by `#table_exists?`. This is for
internal API. This commit will remove these extra args again.
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This is a separate commit, as it is not just a changelog conflict. Want
to point out the changes in the code
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use only object_id instead parent class and parent id
test cases
assert_equal
use table name in references
fix minor problems
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Allow select using Arel and perform a count
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It allows a query like `User.select(:name).count` to be written
using Arel as `User.select(User.arel_table[:name]).count`.
It exposes the calculations API to accept Arel nodes:
`User.count(User.arel_table[:name])`, `User.sum(User.arel_table[:id])`,
`Account.average(Account.arel_table[:credit_limit])`,
`Account.maximum(Account.arel_table[:credit_limit])` and
`Account.minimum(Account.arel_table[:credit_limit])`.
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Fix find_by with association subquery issue
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In this commit, find_by doesn't cache arguments
so that find_by with association subquery works correctly.
Fixes #20817
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I messed up the merge conflict, and accidentally removed a schema query
that needed to be ignored.
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Column names inserted via `group` have to be qualified with table name.
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The `SHOW TABLES LIKE` command accepts metacharacters `%` and `_` in
potentially unexpected ways. This can be avoided by querying `information_schema.tables`
directly.
Fixes #17897
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Fix precision on cache_key
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The default timestamp used for AR is `updated_at` in nanoseconds! (:nsec) This causes issues on any machine that runs an OS that supports nanoseconds timestamps, i.e. not-OS X, where the cache_key of the record persisted in the database (milliseconds precision) is out-of-sync with the cache_key in the ruby VM.
This commit adds:
A test that shows the issue, it can be found in the separate file `cache_key_test.rb`, because
- model couldn't be defined inline
- transactional testing needed to be turned off to get it to pass the MySQL tests
This seemed cleaner than putting it in an existing testcase file.
It adds :usec as a dateformat that calculates datetime in microseconds
It sets precision of cache_key to :usec instead of :nsec, as no db supports nsec precision on timestamps
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Prior to this commit, Rails makes no differentiation between whether a
query uses bind parameters, and whether or not we cache that query as a
prepared statement. This leads to the cache populating extremely fast in
some cases, with the statements never being reused.
In particular, the two problematic cases are `where(foo: [1, 2, 3])` and
`where("foo = ?", 1)`. In both cases we'll end up quoting the values
rather than using a bind param, causing a cache entry for every value
ever used in that query.
It was noted that we can probably eventually change `where("foo = ?",
1)` to use a bind param, which would resolve that case. Additionally, on
PG we can change our generated query to be `WHERE foo = ANY($1)`, and
pass an array for the bind param. I hope to accomplish both in the
future.
For SQLite and MySQL, we still end up preparing the statements anyway,
we just don't cache it. The statement will be cleaned up after it is
executed. On postgres, we skip the prepare step entirely, as an API is
provided to execute with bind params without preparing the statement.
I'm not 100% happy on the way this ended up being structured. I was
hoping to use a decorator on the visitor, rather than mixing a module
into the object, but the way Arel has it's visitor pattern set up makes
it very difficult to extend without inheritance. I'd like to remove the
duplication from the various places that are extending it, but that'll
require a larger restructuring of that initialization logic. I'm going
to take another look at the structure of it soon.
This changes the signature of one of the adapter's internals, and will
require downstream changes from third party adapters. I'm not too
worried about this, as worst case they can simply add the parameter and
always ignore it, and just keep their previous behavior.
Fixes #21992.
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Add stored procedure test in mysql2
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