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`changed_attribute_names_to_save` is called in `keys_for_partial_write`,
which is called on every save when partial writes are enabled.
We can avoid generating the full changes hash by asking the mutation
tracker for just the names of the changed attributes. At minimum this
saves one array allocation per attribute, but will also avoid calling
`Attribute#original_value` which is expensive for serialized attributes.
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This has been possible since Mocha v1.0 and makes it clear that we want
Mocha to integrate with Minitest, not Test::Unit.
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Bring back private class methods accessibility in named scope
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The receiver in a scope was changed from `klass` to `relation` itself
for all scopes (named scope, default_scope, and association scope)
behaves consistently.
In addition. Before 5.2, if both an AR model class and a Relation
instance have same named methods (e.g. `arel_attribute`,
`predicate_builder`, etc), named scope doesn't respect relation instance
information.
For example:
```ruby
class Post < ActiveRecord::Base
has_many :comments1, class_name: "RecentComment1"
has_many :comments2, class_name: "RecentComment2"
end
class RecentComment1 < ActiveRecord::Base
self.table_name = "comments"
default_scope { where(arel_attribute(:created_at).gteq(2.weeks.ago)) }
end
class RecentComment2 < ActiveRecord::Base
self.table_name = "comments"
default_scope { recent_updated }
scope :recent_updated, -> { where(arel_attribute(:updated_at).gteq(2.weeks.ago)) }
end
```
If eager loading `Post.eager_load(:comments1, :comments2).to_a`,
`:comments1` (default_scope) respects aliased table name, but
`:comments2` (using named scope) may not work correctly since named
scope doesn't respect relation instance information. See also 801ccab.
But this is a breaking change between releases without deprecation.
I decided to bring back private class methods accessibility in named
scope.
Fixes #31740.
Fixes #32331.
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ccea4cf broke multiple database structure:dump, the current_config line
should have been deleted instead. I'm struggling to write a test for
this since the confings are passed from rake to the structure_dump
method rather than the other way around. Hoping to come up with a test
while I work on structure:load commands for multiple databases.
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Add custom RuboCop for `assert_not` over `refute`
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73e7aab behaved as expected on codeship, failing the build with
exactly these RuboCop violations. Hopefully `rubocop -a` will
have been enough to get a passing build!
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2.6 warnings: passing splat keyword arguments as a single Hash
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Ruby 2.6.0 warns about this.
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Optimize the code inside AR::QueryCache middleware
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It is wrongly appeared as instance public methods in the doc.
http://api.rubyonrails.org/v5.1.6/classes/ActionCable/Channel/Callbacks.html
http://api.rubyonrails.org/v5.1.6/classes/ActiveRecord/Timestamp.html
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Remove `ForeignKeys` module which was introduced at #32299
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To solve the problem #32299, just enough to introduce
`fk_ignore_pattern` option.
I don't think there is a need to expose these constants.
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An entry in `ActiveRecord::Base.configurations` can either be a
connection spec ("two-level") or a hash of specs ("three-level").
We were detecting two-level configurations by looking for the `database`
key, but the database can also be specified as part of the `url` key,
which meant we incorrectly treated those configurations as three-level.
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Use current_config in structure_dump
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This looks like a typo from 0f0aa6a275876502e002c054896734d6536ba5cd
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Remove expired explanation [ci skip]
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Override callback doesn't work anymore.
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https://travis-ci.org/rails/rails/jobs/360109429
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Don't unset foreign key when preloading missing record
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When a belongs to association's target is set, its foreign key is now
updated to match the new target. This is the correct behaviour when a
new record is assigned, but not when the existing record is preloaded.
As long as we mark the association as loaded, we can skip setting the
target when the record is missing and avoid clobbering the foreign key.
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Previously `relation.all` behaves as `relation.scoping { klass.all }`.
But it is just enough to `relation.spawn`.
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Fix deprecation warnings from with_lock
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Expose foreign key name ignore pattern in configuration
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This makes more sense, as the foreign key ignore pattern is only used by
the schema dumper.
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When dumping the database schema, Rails will dump foreign key names only
if those names were not generate by Rails. Currently this is determined
by checking if the foreign key name is `fk_rails_` followed by
a 10-character hash.
At [Cookpad](https://github.com/cookpad), we use
[Departure](https://github.com/departurerb/departure) (Percona's
pt-online-schema-change runner for ActiveRecord migrations) to run migrations.
Often, `pt-osc` will make a copy of a table in order to run a long migration
without blocking it. In this copy process, foreign keys are copied too,
but [their name is prefixed with an underscore to prevent name collision
](https://www.percona.com/doc/percona-toolkit/LATEST/pt-online-schema-change.html#cmdoption-pt-online-schema-change-alter-foreign-keys-method).
In the process described above, we often end up with a development
database that contains foreign keys which name starts with `_fk_rails_`.
That name does not match the ignore pattern, so next time Rails dumps
the database schema (eg. when running `rake db:migrate`), our
`db/schema.rb` file ends up containing those unwanted foreign key names.
This also produces an unwanted git diff that we'd prefer not to commit.
In this PR, I'd like to suggest a way to expose the foreign key name
ignore pattern to the Rails configuration, so that individual projects
can decide on a different pattern of foreign keys that will not get
their names dumped in `schema.rb`.
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Part 1 Easy Multi db in Rails: Add basic rake tasks for multi db setup
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Moves the configs_for and DatabaseConfig struct into it's own file. I
was considering doing this in a future refactoring but our set up forced
me to move it now. You see there are `mattr_accessor`'s on the Core
module that have default settings. For example the `schema_format`
defaults to Ruby. So if I call `configs_for` or any methods in the Core
module it will reset the `schema_format` to `:ruby`. By moving it to
it's own class we can keep the logic contained and avoid this
unfortunate issue.
The second change here does a double loop over the yaml files. Bear with
me...
Our tests dictate that we need to load an environment before our rake
tasks because we could have something in an environment that the
database.yml depends on. There are side-effects to this and I think
there's a deeper bug that needs to be fixed but that's for another
issue. The gist of the problem is when I was creating the dynamic rake
tasks if the yaml that that rake task is calling evaluates code (like
erb) that calls the environment configs the code will blow up because
the environment is not loaded yet.
To avoid this issue we added a new method that simply loads the yaml and
does not evaluate the erb or anything in it. We then use that yaml to
create the task name. Inside the task name we can then call
`load_config` and load the real config to actually call the code
internal to the task. I admit, this is gross, but refactoring can't all
be pretty all the time and I'm working hard with `@tenderlove` to
refactor much more of this code to get to a better place re connection
management and rake tasks.
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Adds the ability to dump the schema or structure files for mulitple
databases. Loops through the configs for a given env and sets a filename
based on the format, then establishes a connection for that config and
dumps into the file.
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`each_current_configuration` is used by create, drop, and other methods
to find the configs for a given environment and returning those to the
method calling them.
The change here allows for the database commands to operate on all the
configs in the environment. Previously we couldn't slice the hashes and
iterate over them becasue they could be two tier or could be three
tier. By using the database config structs we don't need to care whether
we're dealing with a three tier or two tier, we can just parse all the
configs based on the environment.
This makes it possible for us to run `bin/rails db:create` and it will
create all the configs for the dev and test environment ust like it does
for a two tier - it creates the db for dev and test. Now `db:create`
will create `primary` for dev and test, and `animals` for dev and test
if our database.yml looks like:
```
development:
primary:
etc
animals:
etc
test:
primary:
etc
animals:
etc
```
This means that `bin/rails db:create`, `bin/rails db:drop`, and
`bin/rails db:migrate` will operate on the dev and test env for both
primary and animals ds.
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If we have a three-tier yaml file like this:
```
development:
primary:
database: "development"
animals:
database: "development_animals"
migrations_paths: "db/animals_migrate"
```
This will add db create/drop/and migrate tasks for each level of the
config under that environment.
```
bin/rails db:drop:primary
bin/rails db:drop:animals
bin/rails db:create:primary
bin/rails db:create:animals
bin/rails db:migrate:primary
bin/rails db:migrate:animals
```
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Passing around and parsing hashes is easy if you know that it's a two
tier config and each key will be named after the environment and each
value will be the config for that environment key.
This falls apart pretty quickly with three-tier configs. We have no idea
what the second tier will be named (we know the first is primary but we
don't know the second), we have no easy way of figuring out
how deep a hash we have without iterating over it, and we'd have to do
this a lot throughout the code since it breaks all of Active Record's
assumptions regarding configurations.
These methods allow us to pass around objects instead. This will allow
us to more easily parse the configs for the rake tasks. Evenually I'd
like to replace the Active Record connection management that passes
around config hashes to use these methods as well but that's much
farther down the road.
`walk_configs` takes an environment, specification name, and a config
and turns them into DatabaseConfig struct objects so we can ask the
configs questions like:
```
db_config.spec_name
=> animals
db_config.env_name
=> development
db_config.config
{ :adapter => mysql etc }
```
`db_configs` loops through all given configurations and returns an array
of DatabaseConfig structs for each config in the yaml file.
and lastly `configs_for` takes an environment and either returns the
spec name and config if a block is given or returns an array of
DatabaseConfig structs just for the given environment.
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Add custom prefix to ActiveRecord::Store accessors
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Add a prefix option to ActiveRecord::Store.store_accessor and
ActiveRecord::Store.store. This option allows stores to have identical keys
with different accessors.
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The multiple assignments was caused by 37a1dfa due to lost the `to_s`
normalization for given names.
Fixes #32323.
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It makes to ease to detect a future regression as long as the methods
are covered by this test.
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Use PredicateBuilder for bind params in Relation::Batches
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Using the PredicateBuilder to build the bind
attributes allows Batch to drop its dependency on
Relation::QueryAttribute and Arel::Nodes::BindParam
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saveriomiroddi/add_mysql_json_to_activerecord_store_documentation
Add MySQL JSON reference to ActiveRecord::Store documentation
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