diff options
author | Stan Hu <stanhu@gmail.com> | 2018-06-03 13:31:41 +0300 |
---|---|---|
committer | Stan Hu <stanhu@gmail.com> | 2018-06-05 02:44:03 +0300 |
commit | c26cbfcdfb6a0c83253f42be016692abc3548e8c (patch) | |
tree | a37bfb6b04bb47d2d5494e3522996afcbdc5716b /spec | |
parent | bb2a847c8381dba03ac261c64e0022bf4823f912 (diff) |
Remove N+1 query for author in issues API
This was being masked by the statement cache because only one author was used
per issue in the test..
Also adds support for an Rspec matcher `exceed_all_query_limit`.
Diffstat (limited to 'spec')
-rw-r--r-- | spec/requests/api/issues_spec.rb | 8 | ||||
-rw-r--r-- | spec/support/helpers/query_recorder.rb | 7 | ||||
-rw-r--r-- | spec/support/matchers/exceed_query_limit.rb | 65 |
3 files changed, 59 insertions, 21 deletions
diff --git a/spec/requests/api/issues_spec.rb b/spec/requests/api/issues_spec.rb index 4181f4ebbbe..a15d60aafe0 100644 --- a/spec/requests/api/issues_spec.rb +++ b/spec/requests/api/issues_spec.rb @@ -630,15 +630,17 @@ describe API::Issues do end it 'avoids N+1 queries' do - control_count = ActiveRecord::QueryRecorder.new do + get api("/projects/#{project.id}/issues", user) + + control_count = ActiveRecord::QueryRecorder.new(skip_cached: false) do get api("/projects/#{project.id}/issues", user) end.count - create(:issue, author: user, project: project) + create_list(:issue, 3, project: project) expect do get api("/projects/#{project.id}/issues", user) - end.not_to exceed_query_limit(control_count) + end.not_to exceed_all_query_limit(control_count) end it 'returns 404 when project does not exist' do diff --git a/spec/support/helpers/query_recorder.rb b/spec/support/helpers/query_recorder.rb index 28536bbef5e..7ce63375d34 100644 --- a/spec/support/helpers/query_recorder.rb +++ b/spec/support/helpers/query_recorder.rb @@ -1,10 +1,11 @@ module ActiveRecord class QueryRecorder - attr_reader :log, :cached + attr_reader :log, :skip_cached, :cached - def initialize(&block) + def initialize(skip_cached: true, &block) @log = [] @cached = [] + @skip_cached = skip_cached ActiveSupport::Notifications.subscribed(method(:callback), 'sql.active_record', &block) end @@ -16,7 +17,7 @@ module ActiveRecord def callback(name, start, finish, message_id, values) show_backtrace(values) if ENV['QUERY_RECORDER_DEBUG'] - if values[:name]&.include?("CACHE") + if values[:name]&.include?("CACHE") && skip_cached @cached << values[:sql] elsif !values[:name]&.include?("SCHEMA") @log << values[:sql] diff --git a/spec/support/matchers/exceed_query_limit.rb b/spec/support/matchers/exceed_query_limit.rb index 88d22a3ddd9..cd042401f3a 100644 --- a/spec/support/matchers/exceed_query_limit.rb +++ b/spec/support/matchers/exceed_query_limit.rb @@ -1,17 +1,4 @@ -RSpec::Matchers.define :exceed_query_limit do |expected| - supports_block_expectations - - match do |block| - @subject_block = block - actual_count > expected_count + threshold - end - - failure_message_when_negated do |actual| - threshold_message = threshold > 0 ? " (+#{@threshold})" : '' - counts = "#{expected_count}#{threshold_message}" - "Expected a maximum of #{counts} queries, got #{actual_count}:\n\n#{log_message}" - end - +module ExceedQueryLimitHelpers def with_threshold(threshold) @threshold = threshold self @@ -43,7 +30,7 @@ RSpec::Matchers.define :exceed_query_limit do |expected| end def recorder - @recorder ||= ActiveRecord::QueryRecorder.new(&@subject_block) + @recorder ||= ActiveRecord::QueryRecorder.new(skip_cached: skip_cached, &@subject_block) end def count_queries(queries) @@ -61,4 +48,52 @@ RSpec::Matchers.define :exceed_query_limit do |expected| @recorder.log_message end end + + def skip_cached + true + end + + def verify_count(&block) + @subject_block = block + actual_count > expected_count + threshold + end + + def failure_message + threshold_message = threshold > 0 ? " (+#{@threshold})" : '' + counts = "#{expected_count}#{threshold_message}" + "Expected a maximum of #{counts} queries, got #{actual_count}:\n\n#{log_message}" + end +end + +RSpec::Matchers.define :exceed_all_query_limit do |expected| + supports_block_expectations + + include ExceedQueryLimitHelpers + + match do |block| + verify_count(&block) + end + + failure_message_when_negated do |actual| + failure_message + end + + def skip_cached + false + end +end + +# Excludes cached methods from the query count +RSpec::Matchers.define :exceed_query_limit do |expected| + supports_block_expectations + + include ExceedQueryLimitHelpers + + match do |block| + verify_count(&block) + end + + failure_message_when_negated do |actual| + failure_message + end end |