我有一个员工数据库,可以捕获公司被company_id引用的所有公司的所有员工
我想做这样的事情
sql = "SELECT race,`foreign`,id_number,company_id,COUNT(*) FROM `employees` WHERE company_id = 52 AND race = `African` AND `foreign` = 1 GROUP BY id_number;" temp_arr = [] ActiveRecord::Base.connection.execute(sql).each {|int| temp_arr << int }
像这样
employee_ids = Employees.where(company_id: company_id and race: 'African' and foreign: 1).pluck(:id_number)
我一直收到以下错误
ActiveRecord::StatementInvalid: MysqL2::Error: UnkNown column 'African' in 'where clause':
并且一直在阅读Ruby on Rails Guides并且似乎无法找到我正在寻找的东西.对不起,我从来没有做过这样的查询,可能是格式错误或其他什么
解决方法
你必须用’,’代替’和’
尝试如下;
尝试如下;
employee_ids = Employees.where(company_id: company_id,race: 'African',foreign: 1).pluck(:id_number)