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Related to #33520
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- Move changelog entry of #33530 up in order to preserve the chronology
since we always add new entries on the top of a changelog file.
- Clarify the changelog entry
- Clarify the docs of remove_foreign_key
- Ensure reversible of `remove_foreign_key` with `:primary_key` and `:to_table`
options.
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33515 invert remove foreign key support "to_table"
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remove_foreign_key supports
- remove_foreign_key :accounts, :branches
- remove_foreign_key :accounts, to_table: :branches
but the second one is not reversible.
This branch is to fix and allow second one to be reversible.
[Nikolay Epifanov, Rich Chen]
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violations on delete
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`5 =~ /\d/` returns nil, but Integer doesn't have a `match?` method.
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In cases where the MatchData object is not used, this provides a speed-up:
https://github.com/JuanitoFatas/fast-ruby/#stringmatch-vs-stringmatch-vs-stringstart_withstringend_with-code-start-code-end
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* PostgreSQL 10 new relkind for partitioned tables
Starting with PostgreSQL 10, we can now have partitioned tables natively
* Add comment
* Remove extra space
* Add test for partition table in postgreSQL10
* Select 'p' for "BASE TABLE" and add a test case
to support PostgreSQL 10 partition tables
* Address RuboCop offense
* Addressed incorrect `postgresql_version`
Fixes #33008.
[Yannick Schutz & Yasuo Honda & Ryuta Kamizono]
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Turn on performance based cops
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Use attr_reader/attr_writer instead of methods
method is 12% slower
Use flat_map over map.flatten(1)
flatten is 66% slower
Use hash[]= instead of hash.merge! with single arguments
merge! is 166% slower
See https://github.com/rails/rails/pull/32337 for more conversation
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Follow up of #33358 for SQLite3.
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The consecutive verbatim blocks were being merged making the output look weird.
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#33363 has two regressions. First one is that `insert_fixtures_set` is
failed if flags is an array. Second one is that connection flags are not
restored if `set_server_option` is not supported.
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use set_server_option if possible
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(cherry picked from commit da34d4766c33a042aeb92778a492fa810ec23001)
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Related #31201.
If creating custom primary key (like a string) in SQLite, it would also
create an internal index implicitly which named begin with "sqlite_".
It need to be hidden since the internal object names are reserved and
prohibited for public use.
See https://www.sqlite.org/fileformat2.html#intschema
Fixes #33320.
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The TIME, DATETIME, and TIMESTAMP types [have supported](https://mariadb.com/kb/en/library/microseconds-in-mariadb/)
a fractional seconds precision from 0 to 6.
Default values from time columns with specified precision is read
as `current_timestamp(n)` from information schema.
rake `db:schema:dump` produces `schema.rb` **without** default values for time columns with the specified precision:
t.datetime "last_message_at", precision: 6, null: false
rake `db:schema:dump` produces `schema.rb` **with** default values for time columns with the specified precision:
t.datetime "last_message_at", precision: 6, default: -> { "current_timestamp(6)" }, null: false
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Support readonly option in SQLite3Adapter
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Readonly sqlite database files are very useful as a data format for
storing configuration/lookup data that is too complicated for YAML
files. But since such files would typically be committed to a source
control repository, it's important to ensure that they are truly safe
from being inadvertently modified. Unfortunately using unix permissions
isn't enough, as sqlite will "helpfully" add the write bit to a database
file whenever it's written to.
sqlite3-ruby has supported a `:readonly` option since version 1.3.2 (see
https://github.com/sparklemotion/sqlite3-ruby/commit/c20c9f5dd2990042)
This simply passes that option through to the adapter if present in the
config hash. I think this is best considered an adapter-specific option
since no other supported database has an identical concept.
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This may seem like an unnecessary refactoring but some apps want / need
to configure the information passed to the query cache logger. In order
to do that we can add a method here that can be easily overridden by the
app itself, rather than hacking the query cache logger to include that
information.
To override apps can call
```
def cache_notifications_info
super.merge(connected_host: "hostname")
end
```
This will take what's already in the query cache logger and add
`@something="yea"` to the object.
At GitHub we use this to log the number of queries that are cached, the
connection host and the connection url.
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(same name).
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Since #26074, introduced force equality checking to build a predicate
consistently for both `find` and `create` (fixes #27313).
But the assumption that only array/range attribute have subtype was
wrong. We need to make force equality checking more strictly not to
allow serialized attribute.
Fixes #32761.
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Unlike other databases, changing SQLite3 table definitions need to create a temporary table.
While changing table operations, the original table needs dropped which caused
`SQLite3::ConstraintException: FOREIGN KEY constraint failed` if the table is referenced by foreign keys.
This pull request disables foreign keys by `disable_referential_integrity`.
Also `disable_referential_integrity` method needs to execute `defer_foreign_keys = ON`
to defer re-enabling foreign keys until the transaction is committed.
https://www.sqlite.org/pragma.html#pragma_defer_foreign_keys
Fixes #31988
- This `defer_foreign_keys = ON` has been supported since SQLite 3.8.0
https://www.sqlite.org/releaselog/3_8_0.html and Rails 6 requires SQLite 3.8 #32923 now
- <Models>.reset_column_information added to address `ActiveModel::UnknownAttributeError`
```
Error:
ActiveRecord::Migration::ForeignKeyChangeColumnTest#test_change_column_of_parent_table:
ActiveModel::UnknownAttributeError: unknown attribute 'name' for ActiveRecord::Migration::ForeignKeyChangeColumnTest::Post.
```
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These OS versions have SQLite 3.8 or higher by default.
- macOS 10.10 (Yosemite) or higher
- Ubuntu 14.04 LTS or higher
Raising the minimum version of SQLite 3.8 introduces these changes:
- All of bundled adapters support `supports_multi_insert?`
- SQLite 3.8 always satisifies `supports_foreign_keys_in_create?` and `supports_partial_index?`
- sqlite adapter can support `alter_table` method for foreign key referenced tables by #32865
- Deprecated `supports_multi_insert?` method
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So do not expose `PostgreSQLTypeMetadata` in the doc too.
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After a real (non-savepoint) transaction has committed or rolled back,
the original persistence-related state for all records modified in that
transaction is discarded or restored, respectively.
When the model has transactional callbacks, this happens synchronously
in the `committed!` or `rolled_back!` methods; otherwise, it happens
lazily the next time the record's persistence-related state is accessed.
The synchronous code path always finalizes the state of the record, but
the lazy code path only pops one "level" from the transaction counter,
assuming it will always reach zero immediately after a real transaction.
As the test cases included here demonstrate, that isn't always the case.
By using the same logic as the synchronous code path, we ensure that the
record's state is always updated after a real transaction has finished.
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Follow up of #19171 and #26825.
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`foreign_key`, `json` and `virtual` are also available.
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The merging order was accidentally changed at #32447. The original
intention is force `drop_table ... if_exists: true`. #28070.
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https://github.com/sparklemotion/sqlite3-ruby/blob/v1.3.13/lib/sqlite3/statement.rb#L101-L104
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There's no need to wrap the statement in a hash with a single key.
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to support Oracle database support identity data type
Oracle database does not support `INSERT .. DEFAULT VALUES`
then every insert statement needs at least one column name specified.
When `prefetch_primary_key?` returns `true` insert statement
always have the primary key name since the primary key value is selected
from the associated sequence. However, supporting identity data type
will make `prefetch_primary_key?` returns `false`
then no primary key column name added.
As a result, `empty_insert_statement_value` raises `NotImplementedError`
To address this error `empty_insert_statement_value` can take
one argument `primary_key` to generate insert statement like this.
`INSERT INTO "POSTS" ("ID") VALUES(DEFAULT)`
It needs arity change for the public method but no actual behavior changes for the bundled adapters.
Oracle enhanced adapter `empty_insert_statement_value` implementation will be like this:
```
def empty_insert_statement_value(primary_key)
raise NotImplementedError unless primary_key
"(#{quote_column_name(primary_key)}) VALUES(DEFAULT)"
end
```
[Raise NotImplementedError when using empty_insert_statement_value with Oracle](https://github.com/rails/rails/pull/28029)
[Add support for INSERT .. DEFAULT VALUES](https://community.oracle.com/ideas/13845)
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This was added in 280587588aba6ce13717cd6679e3f2b43d287443, but has been
unused since 392eeecc11a291e406db927a18b75f41b2658253.
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Ruby 2.6.0 warns about this.
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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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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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Fix default connection handling with three-tier config
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If you had a three-tier config, the `establish_connection` that's called
in the Railtie on load can't figure out how to access the default
configuration.
This is because Rails assumes that the config is the first value in the
hash and always associated with the key from the environment. With a
three tier config however we need to go one level deeper.
This commit includes 2 changes. 1) removes a line from `resolve_all`
which was parsing out the the environment from the config so instead of
getting
```
{
:development => {
:primary => {
:database => "whatever"
}
},
:animals => {
:database => "whatever-animals"
}
},
etc with test / prod
}
```
We'd instead end up with a config that had no attachment to it's
envioronment.
```
{
:primary => {
:database => "whatever"
}
:animals => {
:database => "whatever-animals"
}
etc - without test and prod
}
```
Not only did this mean that Active Record didn't know how to establish a
connection, it didn't have the other necessary configs along with it in
the configs list.
So fix this I removed the line that deletes these configs.
The second thing this commit changes is adding this line to
`establish_connection`
```
spec = spec[spec_name.to_sym] if spec[spec_name.to_sym]
```
When you have a three-tier config and don't pass any hash/symbol/env etc
to `establish_connection` the resolver will automatically return both
the primary and secondary (in this case animals db) configurations.
We'll get an `database configuration does not specify adapter` error
because AR will try to establish a connection on the `primary` key
rather than the `primary` key's config. It assumes that the
`development` or default env automatically will return a config hash,
but with a three-tier config we actually get a key and config `primary
=> config`.
This fix is a bit of a bandaid because it's not the "correct" way to
handle this situation, but it does solve our immediate problem. The new
code here is saying "if the config returned from the resolver (I know
it's called spec in here but we interchange our meanings a LOT and what
is returned is a three-tier config) has a key matching the "primary"
spec name, grab the config from the spec and pass that to the
estalbish_connection method".
This works because if we pass `:animals` or a hash, or `:primary` we'll
already have the correct configuration to connect with.
This fixes the case where we want Rail to connect with the default
connection.
Coming soon is a refactoring that should eliminate the need to do this
but I need this fix in order to write the multi-db rake tasks that I
promised in my RailsConf submission. `@tenderlove` and I are working on
the refactoring of the internals for connection management but it won't
be ready for a few weeks and this issue has been blocking progress.
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In #24542, quoted_time was introduced to strip the leading date
component for time columns because it was having a significant
effect in mariadb. However, it assumed that the date component
was always 2000-01-01 which isn't the case, especially if the
source wasn't another time column.
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For legacy reasons Rails stores time columns on sqlite as full
timestamp strings. However because the date component wasn't being
normalized this meant that when they were read back they were being
prefixed with 2001-01-01 by ActiveModel::Type::Time. This had a
twofold result - first it meant that the fast code path wasn't being
used because the string was invalid and second it was corrupting the
second fractional component being read by the Date._parse code path.
Fix this by a combination of normalizing the timestamps on writing
and also changing Active Model to be more lenient when detecting
whether a string starts with a date component before creating the
dummy time value for parsing.
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Ruby 2.4+ provides `Hash#compact` and `Hash#compact!` natively,
so `active_support/core_ext/hash/compact` is no longer necessary.
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