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Timestamp column can have less precision than ruby timestamp
In result in how big a fraction of a second can be stored in the
database.
m = Model.create!
m.created_at.usec == m.reload.created_at.usec
# => false
# due to different seconds precision in Time.now and database column
If the precision is low enough, (mysql default is 0, so it is always low
enough by default) the value changes when model is reloaded from the
database. This patch fixes that issue ensuring that any timestamp
assigned as an attribute is converted to column precision under the
attribute.
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This removes the following warning.
```
activerecord/lib/active_record/relation/calculations.rb:74: warning: `&' interpreted as argument prefix
```
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Fix arguments of `AR::Calculations#sum`
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Arguments of `#sum` does not match with other shortcuts methods
(count, average, minimum, and maximum).
This commit fix these two points:
* call `super` with only block arguments
First argument of `super` method, `Enumerable#sum`, is `identity`
and first argument of `AR::Calculations#sum` is `column_name`.
`Enumerable#sum` does not expect `column_name` to be passed.
* Change first argument of `sum` from array arguemnt to single
argument to match other shortcuts methods. When `sum` accept
array arguemnt, user can pass multi arguments and an exception is
raised from `calculate`.
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This argument was needen when `sanitize_sql_for_conditions` internally
called `sanitize_sql_hash_for_conditions`.
But `sanitize_sql_hash_for_conditions` was deprecated
(https://github.com/rails/rails/commit/eb921000a11bc87a3b001164fc367b84aee584c5)
and deleted
(https://github.com/rails/rails/commit/3a59dd212315ebb9bae8338b98af259ac00bbef3)
(https://github.com/rails/rails/commit/4bd089f1d93fa168b0ae17dd8c92a5157a2537d7).
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These new methods are used from the Active Record model layer to
determine which relations are viable to back a model. These new methods
allow us to change `conn.tables` in the future to only return tables and
no views. Same for `conn.table_exists?`.
The goal is to provide the following introspection methods on the
connection:
* `tables`
* `table_exists?`
* `views`
* `view_exists?`
* `data_sources` (views + tables)
* `data_source_exists?` (views + tables)
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Check mysql structure_load for errors
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structure_dump consistent
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Fixes #21488
[Sean Griffin & johanlunds]
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We should probably review the usage of these constants and decide
whether we want to be more transparent about which things come from
Active Model vs Active Record, as this is meaningful information as to
whether there is database specific behavior or not.
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Things like decorations, overrides, and priorities only matter for
Active Record, so the Active Model registry can be implemented much more
simply. At this point, I wonder if having Active Record's registry
inherit from Active Model's is even worth the trouble?
The Active Model class was also missing test cases, which have been
backfilled.
This removes the error when two types are registered with the same name,
but given that Active Model is meant to be significantly more generic, I
do not think this is an issue for now. If we want, we can raise an error
at the point that someone tries to register it.
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We do not need to require each file from AM individually, the type
module does that for us. Even if the classes are extremely small right
now, I'd rather keep any custom classes needed by AR in their own files,
as they can easily have more complex changes in the future.
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These are used by the connection adapters to convert SQL type
information into the appropriate type object, and makes no sense outside
of the context of Active Record
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The first step of bringing typecasting to ActiveModel
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Add title for key lengths for multiple keys.
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Previously there was no separator between the two code examples so it looked like:
```ruby
CREATE INDEX by_name ON accounts(name(10))
add_index(:accounts, [:name, :surname], name: 'by_name_surname', length: {name: 10, surname: 15})
```
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Support for foreign keys in create table
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If foreign keys specified in create table, generated SQL is slightly more
efficient.
Definition:
```
create_table :testings do |t|
t.references :testing_parent, foreign_key: true
end
```
Before:
```
CREATE TABLE "testings" ("id" serial primary key, "testing_parent_id" integer);
ALTER TABLE "testings" ADD CONSTRAINT "fk_rails_a196c353b2" FOREIGN KEY ("testing_parent_id") REFERENCES "testing_parents" ("id");
```
After:
```
CREATE TABLE "testings" ("id" serial primary key, "testing_parent_id" integer, CONSTRAINT "fk_rails_a196c353b2" FOREIGN KEY ("testing_parent_id") REFERENCES "testing_parents" ("id"));
```
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`table_exists?` calls `tables` twice when passed `'dbname.tblname'` arg.
This change is that `table_exists?` execute only once query always and
extra args of `tables` is removed.
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Add `unsigned` support for numeric data types in MySQL
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In the case of using `unsigned` as the type:
create_table :foos do |t|
t.unsigned_integer :unsigned_integer
t.unsigned_bigint :unsigned_bigint
t.unsigned_float :unsigned_float
t.unsigned_decimal :unsigned_decimal, precision: 10, scale: 2
end
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Example:
create_table :foos do |t|
t.integer :unsigned_integer, unsigned: true
t.bigint :unsigned_bigint, unsigned: true
t.float :unsigned_float, unsigned: true
t.decimal :unsigned_decimal, unsigned: true, precision: 10, scale: 2
end
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Move `explain` into `AbstractMysqlAdapter`
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Common methods in both mysql adapters are should be added to
`AbstractMysqlAdapter`, but some methods had been added to
`Mysql2Adapter`. (8744632f, 0306f82e, #14359)
Some methods already moved from `Mysql2Adapter` to
`AbstractMysqlAdapter`. (#17601, #17998)
Common methods in both mysql adapters are remaining only the `explain`
method in `Mysql2Adapter`.
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Fix undesired type lookup with `SET` in MySQL
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This commit fixes the following problems:
* cause infinit type lookup loop when SET includes aliased types
* For example:
when SET('set') includes aliased type `set`,
then aliased `varchar('set')` by type lookup,
but type lookup infinit matching same rule.
* cause type lookup miss when SET includes registered types
* For example:
when SET('time') includes registered type `time`,
then aliased `varchar('time')` by type lookup,
then matching `time` type.
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kamipo/eliminate_duplicated_visit_table_definition
Eliminate the duplication code of `visit_TableDefinition`
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Do not dump a view as a table in sqlite3, mysql and mysql2 adapters
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Now in sqlite3, mysql and mysql2 adapters, SchemaDumper dump a view as
a table. It is incorrect behavior. This change excludes a view in
schema.rb.
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Remove unnecessary display width
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The **(11)** does not affect the storage size of the data type, which for an
INT will always be 4 bytes. It affects the **display width**.
http://www.tocker.ca/2015/07/02/proposal-to-deprecate-mysql-integer-display-width-and-zerofill.html
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kamipo/eliminate_duplicated_options_include_default_method
Eliminate the duplicated `options_include_default?` method
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Follow up 7ba2cd06.
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Reduce the calling `create_table_info` query
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Currently in schema dumping, `create_table_info` query is called twice
for each tables. It means if 100 tables exists, the query is called 200
times. This change is that the query is called once for each tables in
schema dumping.
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Correctly dump composite primary key
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Example:
create_table :barcodes, primary_key: ["region", "code"] do |t|
t.string :region
t.integer :code
end
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`@connection` in `StatementPool` is only used for PG adapter.
No need for abstract `StatementPool` class.
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The thread_safe gem is being deprecated and all its code has been merged
into the concurrent-ruby gem. The new class, Concurrent::Map, is exactly
the same as its predecessor except for fixes to two bugs discovered
during the merge.
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nodoc raw_write_attribute
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Is this supposed to be public API? If so, I can document it instead.
:memo:
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DRY enum conflict detection
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