Rails：如何select_rows與字段名稱（mysql）

Question

我正在尋找一種方法來獲取類似於ActiveRecord :: Base.connection.select_rows輸出的mysql查詢的結果集，但也包括結果的列名稱作爲第一個元素。

例如：

ActiveRecord::Base.connection.select_rows_with_fields("SELECT id,name FROM users") 
    => [["id", "name"], ["1","amy"],["2","bob"],["3","cam"]] 

Answer 1

select_rows_with_fields：

module ActiveRecord 
    module ConnectionAdapters 
    class Mysql2Adapter 
     def select_rows_with_fields(sql) 
     result = execute(sql) 
     rows = result.to_a 
     rows.unshift(result.fields) 
     end 
    end 
    end 
end