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author | Andrey Novikov <envek@envek.name> | 2017-01-09 01:43:49 +0300 |
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committer | Andrey Novikov <envek@envek.name> | 2017-01-09 23:04:48 +0300 |
commit | cb9d0e4864fa68fad9c49b880c32e90ddf0545bd (patch) | |
tree | 4e6b00404b69cb0d9b08ad3c413c5c27027a5dba /guides/source | |
parent | 3bc747bd8676dc940b531067e2861dcd4ac28efc (diff) | |
download | rails-cb9d0e4864fa68fad9c49b880c32e90ddf0545bd.tar.gz rails-cb9d0e4864fa68fad9c49b880c32e90ddf0545bd.tar.bz2 rails-cb9d0e4864fa68fad9c49b880c32e90ddf0545bd.zip |
Fix inconsistent results when parsing large durations and constructing durations from code
ActiveSupport::Duration.parse('P3Y') == 3.years # It should be true
Duration parsing made independent from any moment of time:
Fixed length in seconds is assigned to each duration part during parsing.
Changed duration of months and years in seconds to more accurate and logical:
1. The value of 365.2425 days in Gregorian year is more accurate
as it accounts for every 400th non-leap year.
2. Month's length is bound to year's duration, which makes
sensible comparisons like `12.months == 1.year` to be `true`
and nonsensical ones like `30.days == 1.month` to be `false`.
Calculations on times and dates with durations shouldn't be affected as
duration's numeric value isn't used in calculations, only parts are used.
Methods on `Numeric` like `2.days` now use these predefined durations
to avoid duplicating of duration constants through the codebase and
eliminate creation of intermediate durations.
Diffstat (limited to 'guides/source')
-rw-r--r-- | guides/source/debugging_rails_applications.md | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/guides/source/debugging_rails_applications.md b/guides/source/debugging_rails_applications.md index df3003a6a8..f12df093ad 100644 --- a/guides/source/debugging_rails_applications.md +++ b/guides/source/debugging_rails_applications.md @@ -683,7 +683,7 @@ Ruby instruction to be executed -- in this case, Active Support's `week` method. 51: # 52: # 2.weeks # => 14 days 53: def weeks -=> 54: ActiveSupport::Duration.new(self * 7.days, [[:days, self * 7]]) +=> 54: ActiveSupport::Duration.new(self * ActiveSupport::Duration::PARTS_IN_SECONDS[:weeks], [[:weeks, self]]) 55: end 56: alias :week :weeks 57: |