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In Rails 3.2 dupping a `CollectionProxy` would dup it's `load_target` as
well. That functionality has been broken since the release of Rails 4.0.
I hit this in an application upgrade and wondered why duplicating a
CollectionProxy and assigning it to a variable stopped working.
When calling `dup` on a `CollectionProxy` only the owner (ex.
topic) was getting duplicated and the `load_target` would remain in tact
with it's original object ID. Dupping the `load_target` is useful for performing
a logging operation after records have been destroyed in a method.
For example:
```
def transfer_operation
saved_replies = topic.replies
topic.replies.clear
saved_replies.each do |reply|
user.update_replies_count!
end
end
```
This change adds a `initialize_dup` method that performs a `deep_dup` on
the `@associatiation` so that the `load_target` is dupped as well.
Fixes #17117
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Follow up #28183
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Handle non-existing $ARCONN
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kamipo/use_max_identifier_length_for_index_name_length
Use `max_identifier_length` for `index_name_length`
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Actually `index_name_length` depend on `max_identifier_length`, not
always 63.
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Fix `test_apply_distinct_in_count` failure in PG adapter
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```
% ARCONN=postgresql be ruby -w -Itest test/cases/calculations_test.rb -n test_apply_distinct_in_count
/Users/kamipo/src/github.com/rails/rails/activesupport/lib/active_support/core_ext/enumerable.rb:20: warning: method redefined; discarding old sum
Using postgresql
Run options: -n test_apply_distinct_in_count --seed 27731
F
Finished in 0.163682s, 6.1094 runs/s, 30.5470 assertions/s.
1) Failure:
CalculationsTest#test_apply_distinct_in_count [test/cases/calculations_test.rb:238]:
Expected /\ASELECT(?! DISTINCT) COUNT\(DISTINCT\b/ to match "SHOW max_identifier_length".
1 runs, 5 assertions, 1 failures, 0 errors, 0 skips
```
https://travis-ci.org/rails/rails/jobs/205493811#L1933
https://travis-ci.org/rails/rails/jobs/205496299#L1562
https://travis-ci.org/rails/rails/jobs/205514765#L1562
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Fix `find_nth` with `limit_value`
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If the `index` exceeds a `limit`, simply return an empty result without
querying the database.
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Deprecate `supports_migrations?` on connection adapters
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`supports_migrations?` was added at 4160b518 to determine if schema
statements (`create_table`, `drop_table`, etc) are implemented in the
adapter. But all tested databases has been supported migrations since
a4fc93c3 at least.
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When a grouped calculation contains a having clause that references a
selected value, we need to include that selected value in the query.
Postgres doesn't support referencing a selected value in a having
clause, but other databases do; we can skip the test on the pg adapter
but run it for the others.
This was fixed before in 9a298a162c16e019fe6971e563e7f4916e86ced6, but
the test coverage was lost in 5a05207d99b7e2678f9b42db2d9ffc21ec2c8c3b.
The fix regressed in 6311975fb3c02f50730fd1e11b8dba8dd9c05306 and was
removed in 97d46c17ea9113b0ce970167f5208c8d9170915c.
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Currently `change_column` cannot drop default if `null: false` is
specified at the same time. This change fixes the issue.
```ruby
# cannot drop default
change_column "tests", "contributor", :boolean, default: nil, null: false
# we need the following workaround currently
change_column "tests", "contributor", :boolean, null: false
change_column "tests", "contributor", :boolean, default: nil
```
Closes #26582
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Deprecate AbstractAdapter#verify! with arguments
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Use ensure block for things we cleanup in tests
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`DISTINCT` clause is applied inside aggregate function by
`operation_over_aggregate_column` if needed. Unneeded outside aggregate
function.
```ruby
# Before
author.unique_categorized_posts.count
# => SELECT DISTINCT COUNT(DISTINCT "posts"."id") FROM "posts" INNER JOIN "categorizations" ON "posts"."id" = "categorizations"."post_id" WHERE "categorizations"."author_id" = ? [["author_id", 2]]
# After
author.unique_categorized_posts.count
# => SELECT COUNT(DISTINCT "posts"."id") FROM "posts" INNER JOIN "categorizations" ON "posts"."id" = "categorizations"."post_id" WHERE "categorizations"."author_id" = ? [["author_id", 2]]
```
Closes #27615
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kamipo/fix_remove_reference_to_multiple_foreign_keys_in_the_same_table
Fix `remove_reference` to multiple foreign keys in the same table
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Originally `quoted_id` was used in legacy quoting mechanism. Now we use
type casting mechanism for that. Let's deprecate `quoted_id`.
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Fixes #26556.
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The native timestamp type in MySQL is different from datetime type.
Internal representation of the timestamp type is UNIX time, This means
that timestamp columns are affected by time zone.
```
> SET time_zone = '+00:00';
Query OK, 0 rows affected (0.00 sec)
> INSERT INTO time_with_zone(ts,dt) VALUES (NOW(),NOW());
Query OK, 1 row affected (0.02 sec)
> SELECT * FROM time_with_zone;
+---------------------+---------------------+
| ts | dt |
+---------------------+---------------------+
| 2016-02-07 22:11:44 | 2016-02-07 22:11:44 |
+---------------------+---------------------+
1 row in set (0.00 sec)
> SET time_zone = '-08:00';
Query OK, 0 rows affected (0.00 sec)
> SELECT * FROM time_with_zone;
+---------------------+---------------------+
| ts | dt |
+---------------------+---------------------+
| 2016-02-07 14:11:44 | 2016-02-07 22:11:44 |
+---------------------+---------------------+
1 row in set (0.00 sec)
```
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Allow 3-level DB configs to group connections by environment
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[Arthur Nogueira Neves & Matthew Draper]
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Add CHANGELOG entry for #27384 and #27762
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The column information for the testings table was being cached
so clear the cache in the test teardown.
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This issue is only appear when you try to call `define_attribute_method`
and passing a symbol in Active Record. It does not appear in isolation
in Active Model itself.
Before this patch, when you run `User.define_attribute_method :foo`, you
will get:
NoMethodError: undefined method `unpack' for :foo:Symbol
from activerecord/lib/active_record/attribute_methods/read.rb:28:in `define_method_attribute'
from activerecord/lib/active_record/attribute_methods/primary_key.rb:61:in `define_method_attribute'
from activemodel/lib/active_model/attribute_methods.rb:292:in `block in define_attribute_method'
from activemodel/lib/active_model/attribute_methods.rb:285:in `each'
from activemodel/lib/active_model/attribute_methods.rb:285:in `define_attribute_method'
This patch contains both a fix in Active Model and a test in Active
Record for this error.
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Ensure test threads share a DB connection
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This ensures multiple threads inside a transactional test to see consistent
database state.
When a system test starts Puma spins up one thread and Capybara spins up
another thread. Because of this when tests are run the database cannot
see what was inserted into the database on teardown. This is because
there are two threads using two different connections.
This change uses the statement cache to lock the threads to using a
single connection ID instead of each not being able to see each other.
This code only runs in the fixture setup and teardown so it does not
affect real production databases.
When a transaction is opened we set `lock_thread` to `Thread.current` so
we can keep track of which connection the thread is using. When we
rollback the transaction we unlock the thread and then there will be no
left-over data in the database because the transaction will roll back
the correct connections.
[ Eileen M. Uchitelle, Matthew Draper ]
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Delegate to `scope` rather than `merge!` for collection proxy
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Because merging the association scope was removed.
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Fix a tests of AR::ValueTooLong when using OracleAdapter
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Oracle database itself does not have `bigint` SQL type, then it gets `ORA-00902: invalid datatype`.
It can be addressed by using ActiveRecord `bigint` type
because Oracle enhanced adapter recognizes ActiveRecord `bigint` type
and transfer it to its equivalent SQL type `NUMBER(19)`.
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primary_keys(table) needs to query various metadata tables in Postgres
to determine the primary key for the table. Previously, it did so using
a complex common table expression against pg_constraint and
pg_attribute.
This patch simplifies the query by using information_schema tables.
This simplifies the logic, making the query far easier to understand,
and additionally avoids an expensive unnest, window function query, and
common table expression.
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Fix `remove_index` to be able to remove expression indexes
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Fixes #26635, #26641.
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Fix unscope with subquery
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Currently cannot unscope subquery properly.
This commit fixes the issue.
Fixes #26323.
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