| Commit message (Collapse) | Author | Age | Files | Lines |
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Currently `type.serialize` and `connection.{quote|type_cast}` for a time
object always does `time.getutc` call regardless of whether it is
already utc time object or not, that duplicated proccess
(`connection.type_cast(type.serialize(time))`) allocates extra/useless
time objects for each type casting.
This avoids that redundant `time.getutc` call if it is already utc time
object. In the case of a model has timestamps (`created_at` and
`updated_at`), it avoids 6,000 time objects allocation for 1,000 times
`model.save`.
```ruby
ObjectSpace::AllocationTracer.setup(%i{path line type})
pp ObjectSpace::AllocationTracer.trace {
1_000.times { User.create }
}.select { |k, _| k[0].end_with?("quoting.rb", "time_value.rb") }
```
Before (c104bfe424e6cebe9c8e85a38515327a6c88b1f8):
```
{["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb",
203,
:T_ARRAY]=>[1004, 0, 778, 0, 1, 0],
["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb",
220,
:T_STRING]=>[2, 0, 2, 1, 1, 0],
["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb",
209,
:T_ARRAY]=>[8, 0, 8, 1, 1, 0],
["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb",
57,
:T_ARRAY]=>[4, 0, 4, 1, 1, 0],
["~/rails/activemodel/lib/active_model/type/helpers/time_value.rb",
17,
:T_DATA]=>[4000, 0, 3096, 0, 1, 0],
["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb",
120,
:T_DATA]=>[2000, 0, 1548, 0, 1, 0],
["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb",
126,
:T_STRING]=>[4000, 0, 3096, 0, 1, 0]}
```
After (this change):
```
{["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb",
203,
:T_ARRAY]=>[1004, 0, 823, 0, 1, 0],
["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb",
220,
:T_STRING]=>[2, 0, 2, 1, 1, 0],
["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb",
209,
:T_ARRAY]=>[8, 0, 8, 1, 1, 0],
["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb",
57,
:T_ARRAY]=>[4, 0, 4, 1, 1, 0],
["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb",
126,
:T_STRING]=>[2000, 0, 1638, 0, 1, 0]}
```
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We sometimes say "✂️ newline after `private`" in a code review (e.g.
https://github.com/rails/rails/pull/18546#discussion_r23188776,
https://github.com/rails/rails/pull/34832#discussion_r244847195).
Now `Layout/EmptyLinesAroundAccessModifier` cop have new enforced style
`EnforcedStyle: only_before` (https://github.com/rubocop-hq/rubocop/pull/7059).
That cop and enforced style will reduce the our code review cost.
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Currently, if `:datetime` type has a precision, type casting always does
round off subseconds regardless of whether necessary or not, it is a bit
slow.
Since #34970, `t.timestamps` with `precision: 6` by default, so
`pluck(:created_at)` in newly created app will always be affected by the
round off.
This avoids the round off if possible, it makes `pluck(:created_at)`
about 25% faster.
https://gist.github.com/kamipo/e029539f2632aee9f5e711fe66fc8842
Before (0a87d7c9ddb95cf7568baf889ff4091469ba9af4 with postgresql adapter):
```
Warming up --------------------------------------
users.pluck(:id) 344.000 i/100ms
users.pluck(:name) 336.000 i/100ms
users.pluck(:created_at) 206.000 i/100ms
Calculating -------------------------------------
users.pluck(:id) 3.620k (± 8.5%) i/s - 18.232k in 5.077316s
users.pluck(:name) 3.579k (± 9.4%) i/s - 17.808k in 5.020230s
users.pluck(:created_at) 2.069k (± 8.0%) i/s - 10.300k in 5.019284s
```
Before (0a87d7c9ddb95cf7568baf889ff4091469ba9af4 with mysql2 adapter):
```
Warming up --------------------------------------
users.pluck(:id) 245.000 i/100ms
users.pluck(:name) 240.000 i/100ms
users.pluck(:created_at) 180.000 i/100ms
Calculating -------------------------------------
users.pluck(:id) 2.548k (± 9.4%) i/s - 12.740k in 5.066574s
users.pluck(:name) 2.513k (± 8.0%) i/s - 12.480k in 5.011260s
users.pluck(:created_at) 1.771k (±11.2%) i/s - 8.820k in 5.084473s
```
After (this change with postgresql adapter):
```
Warming up --------------------------------------
users.pluck(:id) 348.000 i/100ms
users.pluck(:name) 357.000 i/100ms
users.pluck(:created_at) 254.000 i/100ms
Calculating -------------------------------------
users.pluck(:id) 3.628k (± 8.2%) i/s - 18.096k in 5.024748s
users.pluck(:name) 3.624k (±12.4%) i/s - 17.850k in 5.020959s
users.pluck(:created_at) 2.567k (± 7.0%) i/s - 12.954k in 5.081153s
```
After (this change with mysql2 adapter):
```
Warming up --------------------------------------
users.pluck(:id) 268.000 i/100ms
users.pluck(:name) 265.000 i/100ms
users.pluck(:created_at) 207.000 i/100ms
Calculating -------------------------------------
users.pluck(:id) 2.586k (±10.9%) i/s - 12.864k in 5.050546s
users.pluck(:name) 2.543k (±10.2%) i/s - 12.720k in 5.067726s
users.pluck(:created_at) 2.263k (±14.5%) i/s - 10.971k in 5.004039s
```
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This is a follow-up of #35310.
Currently `Topic.find_by(id: "not-a-number")` matches to a `id = 0`
record. That is considered as silently leaking information.
If non numeric string is given to find by an integer column, it should
not be matched to any record.
Related #12793.
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Since `serialize` is passed user input args (from `where`, schema
default, etc), a helper should provide `serialize` if the helper also
provide `cast`.
Related #32624, 34cc301, a741208.
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`value_from_multiparameter_assignment` defined by
`AcceptsMultiparameterTime` helper requires `default_timezone` method
which is defined at `TimeValue` helper.
Since `Date` type doesn't include `TimeValue`, I've extracted `Timezone`
helper to be shared by `Date`, `DateTime`, and `Time` types.
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For example, dirty checking was not right for the following case:
```
model.int_column = "+5"
model.float_column = "0.5E+1"
model.decimal_column = "0.5e-3"
```
It is enough to see whether leading character is a digit for avoiding
invalid numeric expression like 'wibble' to be type-casted to 0, as
this method's comment says.
Fixes #33801
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The multiplication of the value takes a long time when we can instead mutate and use the string value directly.
The `microsec` perf increases speed by 27% in the ideal case (which is the most common).
```
original_string = ".443959"
require 'benchmark/ips'
Benchmark.ips do |x|
x.report("multiply") {
string = original_string.dup
(string.to_r * 1_000_000).to_i
}
x.report("new ") {
string = original_string.dup
if string && string.start_with?(".".freeze) && string.length == 7
string[0] = ''.freeze
string.to_i
end
}
x.compare!
end
# Warming up --------------------------------------
# multiply 125.783k i/100ms
# new 146.543k i/100ms
# Calculating -------------------------------------
# multiply 1.751M (± 3.3%) i/s - 8.805M in 5.033779s
# new 2.225M (± 2.1%) i/s - 11.137M in 5.007110s
# Comparison:
# new : 2225289.7 i/s
# multiply: 1751254.2 i/s - 1.27x slower
```
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Inside user_input_in_time_zone we call in_time_zone on the value and value can be a String.
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Between 4.2 and 5.0 the behavior of how multiparameter attributes
interact with `_before_type_cast` changed. In 4.2 it returns the
post-type-cast value. After 5.0, it returns the hash that gets sent to
the type. This behavior is correct, but will cause an issue if you then
tried to render that value in an input like `text_field` or
`hidden_field`.
In this case, we want those fields to use the post-type-cast form,
instead of the `_before_type_cast` (the main reason it uses
`_before_type_cast` at all is to avoid losing data when casting a
non-numeric string to integer).
I've opted to modify `came_from_user?` rather than introduce a new
method for this as I want to avoid complicating that contract further,
and technically the multiparameter hash didn't come from assignment, it
was constructed internally by AR.
Close #27888.
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This reverts commit 3420a14590c0e6915d8b6c242887f74adb4120f9, reversing
changes made to afb66a5a598ce4ac74ad84b125a5abf046dcf5aa.
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Use `inspect` in `type_cast_for_schema` for date/time and decimal values
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Currently dumping defaults on schema is inconsistent.
Before:
```ruby
create_table "defaults", force: :cascade do |t|
t.string "string_with_default", default: "Hello!"
t.date "date_with_default", default: '2014-06-05'
t.datetime "datetime_with_default", default: '2014-06-05 07:17:04'
t.time "time_with_default", default: '2000-01-01 07:17:04'
t.decimal "decimal_with_default", default: 1234567890
end
```
After:
```ruby
create_table "defaults", force: :cascade do |t|
t.string "string_with_default", default: "Hello!"
t.date "date_with_default", default: "2014-06-05"
t.datetime "datetime_with_default", default: "2014-06-05 07:17:04"
t.time "time_with_default", default: "2000-01-01 07:17:04"
t.decimal "decimal_with_default", default: "1234567890"
end
```
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Currently `apply_seconds_precision` cannnot round usec
when after `require 'mathn'`.
```
irb(main):001:0> 1234 / 1000 * 1000
=> 1000
irb(main):002:0> 1234 - 1234 % 1000
=> 1000
irb(main):003:0> require 'mathn'
=> true
irb(main):004:0> 1234 / 1000 * 1000
=> 1234
irb(main):005:0> 1234 - 1234 % 1000
=> 1000
```
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All indentation was normalized by rubocop auto-correct at 80e66cc4d90bf8c15d1a5f6e3152e90147f00772.
But comments was still kept absolute position. This commit aligns
comments with method definitions for consistency.
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The current code base is not uniform. After some discussion,
we have chosen to go with double quotes by default.
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This moves a bit more of the logic required for dirty checking into the
attribute objects. I had hoped to remove the `with_value_from_database`
stuff, but unfortunately just calling `dup` on the attribute objects
isn't enough, since the values might contain deeply nested data
structures. I think this can be cleaned up further.
This makes most dirty checking become lazy, and reduces the number of
object allocations and amount of CPU time when assigning a value. This
opens the door (but doesn't quite finish) to improving the performance
of writes to a place comparable to 4.1
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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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Any tests for a type which is not overridden by Active Record, and does
not test the specifics of the attributes API interacting in more complex
ways have no reason to be in the Active Record suite. Doing this
revealed that the implementation of the date and time types in AM was
actually completely broken, and incapable of returning any value other
than `nil`.
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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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The first step of bringing typecasting to ActiveModel
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