| Commit message (Collapse) | Author | Age | Files | Lines |
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object filter
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wangjohn/making_callbacks_more_performant"
This reverts commit 09751fdc847c25237891a8fcb0c2312e39bbe86d, reversing
changes made to 6a5ab08d21c4284a05f5e34484b18a91d4e5c50c.
This change caused a failure in
actionpack/test/abstract/callbacks_test.rb.
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callbacks in the CallbackChain, so you don't have to iterate over all
callbacks when checking for duplicates.
Benchmark results when the tests in
activerecord/test/cases/associations_test.rb were run with and without
the change:
== On master (when scanning all of the callbacks):
---------------------------------------------------------
% cumulative self self total
time seconds seconds calls ms/call ms/call name
---------------------------------------------------------
1.85 9.26 0.82 18412 0.04 0.05
ActiveSupport::Callbacks::Callback#matches?
1.22 12.32 0.54 18412 0.03 0.08
ActiveSupport::Callbacks::Callback#duplicates?
0.93 14.61 0.41 19600 0.02 0.21
ActiveSupport::Callbacks::CallbackChain#remove_duplicates
Finished tests in 1.217065s, 30.4010 tests/s, 53.4072 assertions/s.
---------------------------------------------------------
== On my branch (when using a hash to check callback duplication):
---------------------------------------------------------
% cumulative self self total
time seconds seconds calls ms/call ms/call name
---------------------------------------------------------
0.15 29.63 0.06 1188 0.05 0.72
ActiveSupport::Callbacks::CallbackChain#handle_duplicates
0.00 40.50 0.00 84 0.00 0.12
ActiveSupport::Callbacks::Callback#matches?
0.00 40.50 0.00 84 0.00 0.12
ActiveSupport::Callbacks::Callback#duplicates?
0.00 40.50 0.00 91 0.00 0.22
ActiveSupport::Callbacks::CallbackChain#scan_and_remove_duplicates
Finished tests in 1.117757s, 33.1020 tests/s, 58.1522 assertions/s.
---------------------------------------------------------
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Fixes skipping object callback filters
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This allows you to skip callbacks that are defined by objects, e.g. for
`ActionController`:
skip_after_filter MySpecialFilter
Previously this didn't work due to a bug in how Rails compared callbacks
in `Callback#matches?`. When a callback is compiled, if it's an object
filter (i.e. not a method, proc, etc.), `Callback` now defines a method on
`@klass` that is derived from the class name rather than `@callback_id`.
So, when `skip_callback` tries to find the appropriate callback to
remove, `Callback` can regenerate the method name for the filter
object and return the correct value for `Callback#matches?`.
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benofsky/fix_skipping_object_callback_filters"
This reverts commit c79c6980647eb76bfa52178711fb04ba7e9d403b, reversing
changes made to ba4c27479add60b783a0e623c8a5d176c1dc9043.
This broke all the tests. See https://travis-ci.org/rails/rails/builds/6061839
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This allows you to skip callbacks that are defined by objects, e.g. for
`ActionController`:
skip_after_filter MySpecialFilter
Previously this didn't work due to a bug in how Rails compared callbacks
in `Callback#matches?`. When a callback is compiled, if it's an object
filter (i.e. not a method, proc, etc.), `Callback` now defines a method on
`@klass` that is derived from the class name rather than `@callback_id`.
So, when `skip_callback` tries to find the appropriate callback to
remove, `Callback` can regenerate the method name for the filter
object and return the correct value for `Callback#matches?`.
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dmitriy-kiriyenko/fix-double-callback-in-same-statement
Prevent callback from being set twice.
Conflicts:
activesupport/CHANGELOG.md
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When you add one callack in two separate `set_callback` calls - it is
only called once.
When you do it in one `set_callback` call - it is called twice.
This violates the principle of least astonishment for me. Duplicating
callback is usually an error. There is a correct and obvious way to do
anything without this "feature".
If you want to do
before_save :clear_balance, :calculate_tax, :clear_balance
or whatever, you should better do
before_save :carefully_calculate_tax
def carefully_calculate_tax
clear_balance
calculate_tax
clear_balance
end
And this even opens gates for some advanced refactorings, unlike the
first approach.
My assumptions are:
- Principle of least astonishment is violated, when callbacks are either
prevented from duplication, or not.
- Duplicating callbacks is usually an error. When it is intentional -
it's a smell of a bad design and can be approached without abusing
this "feature".
My suggestion is: do not allow duplicating callbacks in one callback
call, like it is not allowed in separate callbacks call.
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Sometimes, on Mac OS X, programmers accidentally press Option+Space
rather than just Space and don’t see the difference. The problem is
that Option+Space writes a non-breaking space (0XA0) rather than a
normal space (0x20).
This commit removes all the non-breaking spaces inadvertently
introduced in the comments of the code.
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It's sometimes hard to quickly find where deprecated call was performed, especially in case of migrating between Rails versions. So this is an attempt to improve the call stack part of the warning message by providing caller explicitly.
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