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Diffstat (limited to 'rubocop/cop/usage_data/large_table.rb')
-rw-r--r-- | rubocop/cop/usage_data/large_table.rb | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/rubocop/cop/usage_data/large_table.rb b/rubocop/cop/usage_data/large_table.rb new file mode 100644 index 00000000000..d9d44f74d26 --- /dev/null +++ b/rubocop/cop/usage_data/large_table.rb @@ -0,0 +1,87 @@ +# frozen_string_literal: true + +module RuboCop + module Cop + module UsageData + class LargeTable < RuboCop::Cop::Cop + # This cop checks that batch count and distinct_count are used in usage_data.rb files in metrics based on ActiveRecord models. + # + # @example + # + # # bad + # Issue.count + # List.assignee.count + # ::Ci::Pipeline.auto_devops_source.count + # ZoomMeeting.distinct.count(:issue_id) + # + # # Good + # count(Issue) + # count(List.assignee) + # count(::Ci::Pipeline.auto_devops_source) + # distinct_count(ZoomMeeting, :issue_id) + MSG = 'Use one of the %{count_methods} methods for counting on %{class_name}' + + # Match one level const as Issue, Gitlab + def_node_matcher :one_level_node, <<~PATTERN + (send + (const {nil? cbase} $...) + $...) + PATTERN + + # Match two level const as ::Clusters::Cluster, ::Ci::Pipeline + def_node_matcher :two_level_node, <<~PATTERN + (send + (const + (const {nil? cbase} $...) + $...) + $...) + PATTERN + + def on_send(node) + one_level_matches = one_level_node(node) + two_level_matches = two_level_node(node) + + return unless Array(one_level_matches).any? || Array(two_level_matches).any? + + if one_level_matches + class_name = one_level_matches[0].first + method_used = one_level_matches[1]&.first + else + class_name = "#{two_level_matches[0].first}::#{two_level_matches[1].first}".to_sym + method_used = two_level_matches[2]&.first + end + + return if non_related?(class_name) || allowed_methods.include?(method_used) + + counters_used = node.ancestors.any? { |ancestor| allowed_method?(ancestor) } + + unless counters_used + add_offense(node, location: :expression, message: format(MSG, count_methods: count_methods.join(', '), class_name: class_name)) + end + end + + private + + def count_methods + cop_config['CountMethods'] || [] + end + + def allowed_methods + cop_config['AllowedMethods'] || [] + end + + def non_related_classes + cop_config['NonRelatedClasses'] || [] + end + + def non_related?(class_name) + non_related_classes.include?(class_name) + end + + def allowed_method?(ancestor) + ancestor.send_type? && !ancestor.dot? && count_methods.include?(ancestor.method_name) + end + end + end + end +end |