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variables [ci skip]
Thanks to @matthewd for the excellent feedback! :heart:
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skip]"
This partially reverts commit 1a203d5e07f639332880099fab610b886b1742fc.
Reason: It was committed by accident
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Ensure we always define attribute methods
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Introduce an Attribute object to handle the type casting dance
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There's a lot more that can be moved to these, but this felt like a good
place to introduce the object. Plans are:
- Remove all knowledge of type casting from the columns, beyond a
reference to the cast_type
- Move type_cast_for_database to these objects
- Potentially make them mutable, introduce a state machine, and have
dirty checking handled here as well
- Move `attribute`, `decorate_attribute`, and anything else that
modifies types to mess with this object, not the columns hash
- Introduce a collection object to manage these, reduce allocations, and
not require serializing the types
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We guarantee that `model.value` does not change after
`model.save && model.reload`. This requires type casting user input for
non-string types.
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Use a conditional rather than early return in `id`
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We'd spend a lot of time calling `hash` and `eql?` on the join model,
which has no primary key. Calling `id` with no primary key is a really
slow way to get back `nil`, so we can improve the performance there.
However, even with the escape clause, we *still* weren't getting high
enough performance, as we were checking the primary key too much. `hash`
will always return `nil.hash` for records with no id, and `==` will
always return `false`. We can optimize those cases in the HABTM join
model.
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morgoth/fix-automatic-maintaining-test-schema-for-sql-format
ActiveRecord::Migration.maintain_test_schema! doesn't work with structure.sql
Conflicts:
activerecord/CHANGELOG.md
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schema format.
Additionally:
* It changes `purge` task on `sqlite3` adapter to recreate database file, to
be consistent with other adapters.
* Adds `purge` step when loading from `schema.rb`
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Remove unused require
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We're not longer using `ipaddr` in schema dumper
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The column name given by the adapter doesn't include the table
namespace, so going through the hashed version of the result set causes
overridden keys.
Fixes #15649
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Refactor determination of max updated timestamp
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`[].max # => nil`
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begin refactoring add_constraints by moving join keys
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add_constraints is complicated and difficult to read. This is the
beginning of a long process of refactoring this code. First step:
moved the join keys out of AssociationScope and into reflection.
We then don't need to call `reflection` because now reflection is
`self`.
`foreign_key` must be named something else because reflection already has a
`foreign_key` method and when passed into `JoinKeys` it was getting the
wrong assignment. `reflection_foreign_key` seemed to be an appropriate name.
I also named `key` `reflection_key` to match `reflection_foreign_key`.
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rm cached attributes
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The original patch that added this concept can be found
[here](https://web.archive.org/web/20090601022739/http://dev.rubyonrails.org/ticket/9767).
The current default behavior is to cache everything except serialized
columns, unless the user specified otherwise. If anyone were to specify
otherwise, many types would actually be completely broken. Still, the
method is left in place with a deprecation warning in case anyone is
actually still calling this method.
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Remove deprecation warning
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Ensure `column_types` returns a type object, and not a column
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We are no longer including column objects in YAML serialization, thanks
to https://github.com/rails/rails/pull/15621
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No need to decorate columns twice
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We never want result types to override column types, and
`decorate_columns` can only affect column types. No need to go through
the decoration multiple times, we can just exclude the column types from
the result types instead.
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On MySQL and PostgreSQL, the adapter does not type cast virtual columns
for us.
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Inline PG array type casting helper
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Reflection has an available method that is used to check if the
reflection is a collection. Any :has_many macro is considered a
collection and `collection?` should be used instead of
`macro == :has_many`.
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add has_one? method and reuse instead of checking macro
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Instead of checking for `macro == :has_one` throughout the
codebase we can create a `has_one?` method to match the `belongs_to?`,
`polymorphic?` and other methods.
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Abstract away use of HABTM macro
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By having the `:has_and_belongs_to_many` macro in the `@collection`
we are punishing `:has_many` associations because it has to allocate
the array and check the macro.
@collection is returned to `macro == :has_many` and a new reflection
class `HABTMReflection` is created to handle this case instead.
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This reverts commit dd3ea17191e316aeebddaa7b176f6cfeee7a6365 and add a
regression test.
Fixes #15418
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In some cases there is a difference between the two, we should always
be doing one or the other. For convenience, `type_cast` is still a
private method on type, so new types that do not need different behavior
don't need to implement two methods, but it has been moved to private so
it cannot be used accidentally.
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Use an actual identity type in AR::Result#identity_type
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We should be able to rely on this object implenting the full type
interface.
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Make `_before_type_cast` actually be before type cast
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- The following is now true for all types, all the time
- `model.attribute_before_type_cast == given_value`
- `model.attribute == model.save_and_reload.attribute`
- `model.attribute == model.dup.attribute`
- `model.attribute == YAML.load(YAML.dump(model)).attribute`
- Removes the remaining types implementing `type_cast_for_write`
- Simplifies the implementation of time zone aware attributes
- Brings tz aware attributes closer to being implemented as an attribute
decorator
- Adds additional point of control for custom types
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