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Λ׆༻ͯ͠
Ϟσϧ໊มߋͷ
ෛ࠴ղফΛͨ͠
@alpaca-tc
,BJHJPO3BJMT
@alpaca_tc
5SBDF1PJOU
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%FWFMPQFS1SPEVDUJWJUZ&OHJOFFS!4NBSU)3
ΞϧύΧୂ
# 最近のRailsコントリビュート
# DB制約のチェックをtransaction末尾まで遅延可能
add_exclusion_constraint(…, deferrable: :deferred)
add_unique_constraint(…, deferrable: :deferred)
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ٕज़తෛ࠴
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ٕज़తෛ࠴
Өڹൣғ͕େ͖͍
࡞ۀྔ͕େ
มߋͷ෭࡞༻ͷௐ͕ࠪେม
Ͳ͔͜ΒखΛ͚ͭΕʜ
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5SBDF1PJOU
3VCZඪ४ϥΠϒϥϦ
͞·͟·ͳΠϕϯτΛτϨʔε
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ͳͥࢲࠓൃදΛ͢Δͷ͔
w ѱ໋໊͍نଇͩͬͨͨΊɺͯ͢ͷϞσϧ໊Λมߋ͢Δෛ࠴ղফ
w
DPNNJU
ߦ
w ӨڹൣғΞϓϦέʔγϣϯશମ
w 5SBDF1PJOU ΠϕϯτΛτϨʔε͢Δඪ४ϥΠϒϥϦ
Λ׆༻ͯ͠
w ࣄྫ͕গͳ͍ͷͰɺօ༷ʹཱͭώϯτΛൃ৴Ͱ͖Δ͔
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ͰΈͳ͞·͕ಘΒΕΔ͜ͱ
w 5SBDF1PJOUͷجૅࣝ
w 5SBDF1PJOUΛ׆༻͢ΔͨΊͷ5JQT
w ॳڃऀ
w 5SBDF1PJOU͕໘ന͍
w தڃऀҎ্
w ෛ࠴ղফʹཱͭώϯτ
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ΞδΣϯμ
w Ϟσϧ໊Λมߋ͢Δෛ࠴ղফͰΓ͍ͨ͜ͱ
w 5SBDF1PJOUͷجຊ
w 5SBDF1PJOUΛ׆༻͢ΔͨΊͷ5JQT
w σϞ
w ·ͱΊ
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Ϟσϧ໊Λมߋ͢Δ
ෛ࠴ղফͰΓ͍ͨ͜ͱ
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1SPKFDU4IFFU4FDUJPO*UFN*OQVU/VNCFS
w ωʔϜεϖʔεͰωετͨ͠Ϟσϧ໊Λ࠾༻͍ͯͨ͠
w ʮઃఆΑΓنʯʹଇΒͣɺؔ࿈ఆ͕ٛ
w ςʔϒϧ໊ɾΧϥϜ໊ɾؔ࿈໊͕͘ͳΓ͕ͪ
w ΧϥϜ໊͕͗ͯ͢3BJMTͷόάΛ౿ΉSBJMTSBJMT
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1SPKFDU4IFFU4FDUJPO*UFN*OQVU/VNCFS
w ϞσϧΛBQQNPEFMTԼʹஔ
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1SPKFDU4IFFU4FDUJPO*UFN*OQVU/VNCFS
w ϞσϧΛBQQNPEFMTԼʹஔ
w มߋ͕ඞཁͳͷ
w ఆ Ϟσϧ໊
ɺϑΝΠϧύε
w ؔ࿈໊ͷϝλϓϩDSFBUF@YYY
CVJME@YYY
w ΧϥϜ໊YYY@JE
w 'BDUPSZ#PUɺ9YY%FDPSBUPSɺ"3ϝιου܈XIFSFKPJOTʜ
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ͱͯख࡞ۀͰஔͰ͖ͳ͍ʂ
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5SBDF1PJOU
ର ར༻ՕॴΛಛఆ ஔॲཧ
w ఆ໊
w ؔ࿈໊
w ΧϥϜ໊
T0ME/FXH
GJMFQBUIUPBSC-
GJMFQBUIUPCSC-
GJMFQBUIUPD@TQFDSC-
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5SBDF1PJOUͷجຊ
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5SBDF1PJOUͷجຊ
w ඪ४ϥΠϒϥϦ
w 3VCZ্ͷ༷ʑͳΠϕϯτΛϑοΫͰ͖Δ
w DBMM3VCZͰهड़͞Εͨϝιουͷݺͼग़͠
w MJOFࣜͷධՁ
w SFUVSO3VCZͰهड़͞Εͨϝιουݺͼग़͔͠ΒͷϦλʔϯ
w SBJTFྫ֎ͷൃੜ
w ʜଞଟ
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trace_point = TracePoint.new(:call) do |tp|
pp([tp.event, tp.method_id, tp.path, tp.defined_class])
end
def hello
"hello"
end
def say_hello
hello
end
trace_point.enable
say_hello
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trace_point = TracePoint.new(:call) do |tp|
pp([tp.event, tp.method_id, tp.path, tp.defined_class])
end
def hello
"hello"
end
def say_hello
hello
end
trace_point.enable
say_hello
ΠϕϯτͷτϨʔεΛ։࢝
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trace_point = TracePoint.new(:call) do |tp|
pp([tp.event, tp.method_id, tp.path, tp.defined_class])
end
def hello
"hello"
end
def say_hello
hello
end
trace_point.enable
say_hello
ϝιουݺͼग़͠
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trace_point = TracePoint.new(:call) do |tp|
pp([tp.event, tp.method_id, tp.path, tp.defined_class])
end
def hello
"hello"
end
def say_hello
hello
end
trace_point.enable
say_hello
ϒϩοΫ͕࣮ߦ
#=> [:call, :say_hello, "/private/tmp/xxx.rb", Object]
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trace_point = TracePoint.new(:call) do |tp|
pp([tp.event, tp.method_id, tp.path, tp.defined_class])
end
def hello
"hello"
end
def say_hello
hello
end
trace_point.enable
say_hello
#=> [:call, :say_hello, "/private/tmp/xxx.rb", Object]
ϝιουݺͼग़͠
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trace_point = TracePoint.new(:call) do |tp|
pp([tp.event, tp.method_id, tp.path, tp.defined_class])
end
def hello
"hello"
end
def say_hello
hello
end
trace_point.enable
say_hello
ϒϩοΫ͕࣮ߦ
#=> [:call, :say_hello, "/private/tmp/xxx.rb", Object]
#=> [:call, :hello, "/private/tmp/xxx.rb", Object]
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trace_point = TracePoint.new(:call) do |tp|
pp([tp.event, tp.method_id, tp.path, tp.defined_class])
end
def hello
"hello"
end
def say_hello
hello
end
trace_point.enable
say_hello
w EF
fi
OFE@DMBTTϝιουΛఆٛͨ͠Ϋϥε͔Ϟδϡʔϧ
w TFMGΠϕϯτΛൃੜͤͨ͞ΦϒδΣΫτ
w NFUIPE@JEϝιουͷఆٛ࣌ͷ໊લ
w QBSNFUFSTϝιουͷύϥϝʔλఆٛ
w CJOEJOHϝιουͷCJOEJOHɻFWBMΛ͑ͳΜͰͰ͖Δ
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5SBDF1PJOUΛ
׆༻͢ΔͨΊͷ5JQT
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5SBDF1PJOUΛ׆༻͢ΔͨΊͷ5JQT
w ϝιουͷݺͼग़͠ϑΝΠϧͷಛఆ
w ϝιουΛݺͼग़ͨ͠ιʔείʔυͷಛఆ
w 5SBDF1PJOUͷ࠷దԽ
w ύϥϝʔλͷऔಘ
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ϝιουͷݺͼग़͠ϑΝΠϧͷಛఆ
5ISFBEFBDI@DBMMFS@MPDBUJPO
w BQQTQFDԼͷஔରͷϑΝΠϧΛಛఆ͍ͨ͠
w DBMMFSܥͷελοΫΛར༻͢Δ
w 3VCZ͔Β5ISFBEFBDI@DBMMFS@MPDBUJPO͕͍
͜Μͳͷྻ͕औΕΔ
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# 今回の置換では、appかspec配下にあるファイルが対象
TARGETS = [
Rails.root.join('app').to_s,
Rails.root.join('spec').to_s
].freeze
# @return [Thread::Backtrace::Location] ファイルパスや行数情報
def find_caller_location
Thread.each_caller_location do |location|
path = location.path
next if path == __FILE__
return location if TARGETS.any? { path.start_with?(_1) }
end
end
#=> "app/models/input_number.rb:11:in `tenant'"
location = find_caller_location
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# 今回の置換では、appかspec配下にあるファイルが対象
TARGETS = [
Rails.root.join('app').to_s,
Rails.root.join('spec').to_s
].freeze
# @return [Thread::Backtrace::Location] ファイルパスや行数情報
def find_caller_location
Thread.each_caller_location do |location|
path = location.path
next if path == __FILE__
return location if TARGETS.any? { path.start_with?(_1) }
end
end
#=> "app/models/input_number.rb:11:in `tenant'"
location = find_caller_location
ஔରΛࢦఆ
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# 今回の置換では、appかspec配下にあるファイルが対象
TARGETS = [
Rails.root.join('app').to_s,
Rails.root.join('spec').to_s
].freeze
# @return [Thread::Backtrace::Location] ファイルパスや行数情報
def find_caller_location
Thread.each_caller_location do |location|
path = location.path
next if path == __FILE__
return location if TARGETS.any? { path.start_with?(_1) }
end
end
#=> "app/models/input_number.rb:11:in `tenant'"
location = find_caller_location
ελοΫΛॱʹḪΔ
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# 今回の置換では、appかspec配下にあるファイルが対象
TARGETS = [
Rails.root.join('app').to_s,
Rails.root.join('spec').to_s
].freeze
# @return [Thread::Backtrace::Location] ファイルパスや行数情報
def find_caller_location
Thread.each_caller_location do |location|
path = location.path
next if path == __FILE__
return location if TARGETS.any? { path.start_with?(_1) }
end
end
#=> "app/models/input_number.rb:11:in `tenant'"
location = find_caller_location
ஔରͳΒΛฦ͢
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# 今回の置換では、appかspec配下にあるファイルが対象
TARGETS = [
Rails.root.join('app').to_s,
Rails.root.join('spec').to_s
].freeze
# @return [Thread::Backtrace::Location] ファイルパスや行数情報
def find_caller_location
Thread.each_caller_location do |location|
path = location.path
next if path == __FILE__
return location if TARGETS.any? { path.start_with?(_1) }
end
end
#=> "app/models/input_number.rb:11:in `tenant'"
location = find_caller_location
ύεͱߦ͕Θ͔Δ
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ϝιουΛݺͼग़ͨ͠ιʔείʔυͷಛఆ
5ISFBE#BDLUSBDF-PDBUJPOΑΓਖ਼֬ͳҐஔใ
w 5ISFBE#BDLUSBDF-PDBUJPOϑΝΠϧύεߦ·Ͱ
w ϑΝΠϧɾߦΑΓਫ਼៛ͳҐஔใΛಛఆͯ͠ɺஔΛָʹ͍ͨ͠
w 3VCZ7."CTUSBDU4ZOUBY5SFFͰɺΑΓਖ਼֬ͳίʔυҐஔΛಛఆ͢Δ
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class Hello
def hello
puts "hello"
end
end
3VCZ7."CTUSBDU4ZOUBY5SFFQBSTF
SCOPE@#13
CLASS@#12 COLON2(:Hello)@#0
SCOPE@#11
BLOCK@#9
BEGIN@#1
DEFN(:hello)@#3 SCOPE@#8
ARGS@#4
FCALL(puts)@#5
LIST@#7
STR(hello)@#6
ιʔείʔυ நߏจ "45
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class Hello
def hello
puts "hello"
end
end
SCOPE@#13
CLASS@#12 COLON2(:Hello)@#0
SCOPE@#11
BLOCK@#9
BEGIN@#1
DEFN(:hello)@#3 SCOPE@#8
ARGS@#4
FCALL(puts)@#5
LIST@#7
STR(hello)@#6
3VCZ7."CTUSBDU4ZOUBY5SFFQBSTF
֤ϊʔυϢχʔΫͳOPEF@JEΛ࣋ͭ
ιʔείʔυ நߏจ "45
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ϝιουͷݺͼग़͠ιʔείʔυͷಛఆ
3VCZ7."CTUSBDU4ZOUBY5SFF
w 3VCZ7."CTUSBDU4ZOUBY5SFFOPEF@JE@GPS@CBDLUSBDF@MPDBUJPO
w 5ISFBE#BDLUSBDF-PDBUJPO͔ΒOPEF@JEΛऔಘͰ͖Δ
w OPEF@JEͰ୳ࡧ͢Εɺݺͼग़͠Λͨ͠ιʔείʔυΛಛఆՄೳ
w ࣮ݧతػೳ
w ޙํޓੑอূ͞Εͳ͍
w ͨ·ʹؒҧͬͨ݁ՌΛฦ͢ ମײͰ͙Β͍
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# 呼び出し元のThread::Backtrace::Locationを取得
caller_location = find_caller_location
# node_idを取得
node_id = RubyVM::AbstractSyntaxTree.node_id_for_backtrace_location(
caller_location
)
# ファイルパス + node_idで正確なソースコードを取得できる
ast = RubyVM::AbstractSyntaxTree.parse_file(
caller_location.path,
keep_script_lines: true
)
node = find_node_id(ast, node_id)
#=> 正確な位置情報やソースコードを取得できる
[node.first_lineno, node.first_column, node.last_lineno, node.last_column]
node.source
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# 呼び出し元のThread::Backtrace::Locationを取得
caller_location = find_caller_location
# node_idを取得
node_id = RubyVM::AbstractSyntaxTree.node_id_for_backtrace_location(
caller_location
)
# ファイルパス + node_idで正確なソースコードを取得できる
ast = RubyVM::AbstractSyntaxTree.parse_file(
caller_location.path,
keep_script_lines: true
)
node = find_node_id(ast, node_id)
#=> 正確な位置情報やソースコードを取得できる
[node.first_lineno, node.first_column, node.last_lineno, node.last_column]
node.source
ݺͼग़͠ݩͷใΛऔಘ
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# 呼び出し元のThread::Backtrace::Locationを取得
caller_location = find_caller_location
# node_idを取得
node_id = RubyVM::AbstractSyntaxTree.node_id_for_backtrace_location(
caller_location
)
# ファイルパス + node_idで正確なソースコードを取得できる
ast = RubyVM::AbstractSyntaxTree.parse_file(
caller_location.path,
keep_script_lines: true
)
node = find_node_id(ast, node_id)
#=> 正確な位置情報やソースコードを取得できる
[node.first_lineno, node.first_column, node.last_lineno, node.last_column]
node.source
OPEF@JEʹม
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# 呼び出し元のThread::Backtrace::Locationを取得
caller_location = find_caller_location
# node_idを取得
node_id = RubyVM::AbstractSyntaxTree.node_id_for_backtrace_location(
caller_location
)
# ファイルパス + node_idで正確なソースコードを取得できる
ast = RubyVM::AbstractSyntaxTree.parse_file(
caller_location.path,
keep_script_lines: true
)
node = find_node_id(ast, node_id)
#=> 正確な位置情報やソースコードを取得できる
[node.first_lineno, node.first_column, node.last_lineno, node.last_column]
node.source
"45͔ΒҰக͢ΔOPEFΛऔಘ
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# 呼び出し元のThread::Backtrace::Locationを取得
caller_location = find_caller_location
# node_idを取得
node_id = RubyVM::AbstractSyntaxTree.node_id_for_backtrace_location(
caller_location
)
# ファイルパス + node_idで正確なソースコードを取得できる
ast = RubyVM::AbstractSyntaxTree.parse_file(
caller_location.path,
keep_script_lines: true
)
node = find_node_id(ast, node_id)
#=> 正確な位置情報やソースコードを取得できる
[node.first_lineno, node.first_column, node.last_lineno, node.last_column]
node.source ιʔείʔυͷ༰
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5SBDF1PJOUͷ࠷దԽ
w ͜͜ͰΫΠζͰ͢ɻ
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count = 0
TracePoint.new(:call) do
count += 1
end.enable
# この1行で、内部のメソッド呼び出しは何回起こる？
User.where(id: 1).load
puts count #=> ???
DPVOU͍ͭ͘ʹͳΔͰ͠ΐ͏͔
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DPVOU͍ͭ͘ʹͳΔͰ͠ΐ͏͔
count = 0
TracePoint.new(:call) do
count += 1
end.enable
# この1行で、内部のメソッド呼び出しは何回起こる？
User.where(id: 1).load
puts count #=>
約5,000回
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ૣظϦλʔϯ͢Δ
࠷దԽΛ͠·͠ΐ͏
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TARGET_METHODS = [
ActiveRecord::Base.method(:has_one),
ActiveRecord::Base.method(:has_many),
ActiveRecord::Base.method(:belongs_to),
ActiveRecord::Base.method(:has_and_belongs_to_many),
].map { [_1.owner, _1.name] }.to_set
trace_point = TracePoint.new(:call) do |tp|
next unless TARGET_METHODS.include?([tp.defined_class, tp_method_id]])
...
end
ඞཁͳϝιουҎ֎ૣظϦλʔϯ
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TARGET_METHODS = [
ActiveRecord::Base.method(:has_one),
ActiveRecord::Base.method(:has_many),
ActiveRecord::Base.method(:belongs_to),
ActiveRecord::Base.method(:has_and_belongs_to_many),
].map { [_1.owner, _1.name] }.to_set
trace_point = TracePoint.new(:call) do |tp|
next unless TARGET_METHODS.include?([tp.defined_class, tp_method_id]])
...
end
ඞཁͳϝιουҎ֎ૣظϦλʔϯ
ؔ࿈ఆٛͷϝιουΛࢦఆ
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TARGET_METHODS = [
ActiveRecord::Base.method(:has_one),
ActiveRecord::Base.method(:has_many),
ActiveRecord::Base.method(:belongs_to),
ActiveRecord::Base.method(:has_and_belongs_to_many),
].map { [_1.owner, _1.name] }.to_set
trace_point = TracePoint.new(:call) do |tp|
next unless TARGET_METHODS.include?([tp.defined_class, tp_method_id]])
...
end
ඞཁͳϝιουҎ֎ૣظϦλʔϯ
τϨʔεର֎ૣظϦλʔϯ
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ύϥϝʔλͷऔಘ
w QSFMPBEKPJOTͳͲͷϝιουҾͷؔ࿈໊͕ஔରͩͬͨ
w 5SBDF1PJOUQBSBNFUFSTͰҾͷ໊લΛऔಘ
w 5SBDF1PJOUCJOEJOHMPDBM@WBSJBCMF@HFUʹ͢
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trace_point = TracePoint.new(:call) do |tp|
names = tp.parameters.map { _2 }
parameters = names.to_h do
[_1, tp.binding.local_variable_get(_1)]
end
pp(parameters)
end
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trace_point = TracePoint.new(:call) do |tp|
names = tp.parameters.map { _2 }
parameters = names.to_h do
[_1, tp.binding.local_variable_get(_1)]
end
pp(parameters)
end
ύϥϝʔλ໊Λऔಘ
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trace_point = TracePoint.new(:call) do |tp|
names = tp.parameters.map { _2 }
parameters = names.to_h do
[_1, tp.binding.local_variable_get(_1)]
end
pp(parameters)
end
Λऔಘ
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def a(*, **, &); end
def b(...); end
ແ໊ҾMPDBM@WBSJBCMF@HFUͰ͖ͳ͍ʂ
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def extract_rest_parameters(*args, **options, &block)
{ :* => args,
:** => options,
:"..." => [args, options, block],
:& => block }
end
trace_point = TracePoint.new(:call) do |tp|
rest_names = tp.parameters.filter_map { _2 if [:*, :**, :&].include?(_2) }
rest_variables = begin
tp.binding.eval("extract_rest_parameters(#{rest_names.join(',
')})").slice(*rest_names)
rescue SyntaxError
tp.binding.eval("extract_rest_parameters(...)").slice(:"...")
end
pp rest_variables
end
trace_point.enable
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def extract_rest_parameters(*args, **options, &block)
{ :* => args,
:** => options,
:"..." => [args, options, block],
:& => block }
end
trace_point = TracePoint.new(:call) do |tp|
rest_names = tp.parameters.filter_map { _2 if [:*, :**, :&].include?(_2) }
rest_variables = begin
tp.binding.eval("extract_rest_parameters(#{rest_names.join(',
')})").slice(*rest_names)
rescue SyntaxError
tp.binding.eval("extract_rest_parameters(...)").slice(:"...")
end
pp rest_variables
end
trace_point.enable
ແ໊ͳSFTUҾ໊ΛऔΓग़͢
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def extract_rest_parameters(*args, **options, &block)
{ :* => args,
:** => options,
:"..." => [args, options, block],
:& => block }
end
trace_point = TracePoint.new(:call) do |tp|
rest_names = tp.parameters.filter_map { _2 if [:*, :**, :&].include?(_2) }
rest_variables = begin
tp.binding.eval("extract_rest_parameters(#{rest_names.join(',
')})").slice(*rest_names)
rescue SyntaxError
tp.binding.eval("extract_rest_parameters(...)").slice(:"...")
end
pp rest_variables
end
trace_point.enable
FYUSBDU@SFTU@QBSBNFUFST
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def extract_rest_parameters(*args, **options, &block)
{ :* => args,
:** => options,
:"..." => [args, options, block],
:& => block }
end
trace_point = TracePoint.new(:call) do |tp|
rest_names = tp.parameters.filter_map { _2 if [:*, :**, :&].include?(_2) }
rest_variables = begin
tp.binding.eval("extract_rest_parameters(#{rest_names.join(',
')})").slice(*rest_names)
rescue SyntaxError
tp.binding.eval("extract_rest_parameters(...)").slice(:"...")
end
pp rest_variables
end
trace_point.enable
มʹଋറ͞ΕΔ
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def extract_rest_parameters(*args, **options, &block)
{ :* => args,
:** => options,
:"..." => [args, options, block],
:& => block }
end
trace_point = TracePoint.new(:call) do |tp|
rest_names = tp.parameters.filter_map { _2 if [:*, :**, :&].include?(_2) }
rest_variables = begin
tp.binding.eval("extract_rest_parameters(#{rest_names.join(',
')})").slice(*rest_names)
rescue SyntaxError
tp.binding.eval("extract_rest_parameters(...)").slice(:"...")
end
pp rest_variables
end
trace_point.enable
ύϥϝʔλ໊Λऔಘ
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def extract_rest_parameters(*args, **options, &block)
{ :* => args,
:** => options,
:"..." => [args, options, block],
:& => block }
end
trace_point = TracePoint.new(:call) do |tp|
rest_names = tp.parameters.filter_map { _2 if [:*, :**, :&].include?(_2) }
rest_variables = begin
tp.binding.eval("extract_rest_parameters(#{rest_names.join(',
')})").slice(*rest_names)
rescue SyntaxError
tp.binding.eval("extract_rest_parameters(...)").slice(:"...")
end
pp rest_variables
end
trace_point.enable
ͷ߹ͪ͜Β͕ॲཧ͞ΕΔ
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σϞ
w 044NBTUPEPONBTUPEPO
w ؔ࿈໊Λͬͨϝιουݺͼग़͠ՕॴΛର
w CFMPOHT@UPVTFSͳΒ
w CVJME@VTFSDSFBUF@VTFSSFMPBE@VTFSVTFSVTFS
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·ͱΊ
w 5SBDF1PJOUΛ׆༻͢Δͱϝιουݺͼग़͠ͷใΛऔಘՄೳ
w Өڹൣғௐࠪஔॲཧʹ׆͔ͤΔ
w ஔॲཧτϥϒϧͳ͘Ͱ͖ͨͷ͔ʁ
w ʮػցతͳஔมͳͲҰ෦ͷखಈஔʯͰ
w ςετΛॻ͍͍ͯͳ͔ͬͨՕॴͰΤϥʔ
w ʮ4NBSU)3Ϟσϧ໊ʯͰݕࡧ͢ΔͱςοΫϒϩά͕ݟΕ·͢
w 5SBDF1PJOUͷ໘ന͞ɺෛ࠴ղফʹ׆͔ͤͦ͏ͳώϯτΘΓ·͔ͨ͠ʁ
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͋Γ͕ͱ͏͍͟͝·ͨ͠