Ruby on Rails：獲取ActiveRecord連接的統計查詢總數

Question

獲取Ruby on Rails中ActiveRecord連接的查詢數量/計數的簡單方法是什麼？

訂閱，as explained in this SO thread，實現起來似乎有點複雜，因爲我只想要在連接的整個生命週期內發出的實際總查詢數量。

Answer 1

所以我做了猴補丁初始化我自己:)

### Query Counter for mysql2 adapter 
module ActiveRecord 
    module ConnectionAdapters 
    class AbstractAdapter 
     @@querycount = 0 
     attr_reader :querycount 
     def self.querycount; @@querycount; end 
    end 
    class Mysql2Adapter < AbstractMysqlAdapter 
     def exec_query(sql, name = 'SQL', binds = []) 
     @@querycount += 1 
     @querycount = 0 if @querycount.nil? 
     @querycount += 1 
     result = execute(sql, name) 
     ActiveRecord::Result.new(result.fields, result.to_a) 
     end 
    end 
    end 
end 

那麼你可以得到所有連接的總querycount與

ActiveRecord::ConnectionAdapters::AbstractAdapter.querycount