Sql Ruby Sequel子查询发生在主查询之前

有人能帮我解决这个问题吗

我需要将以下sql代码翻译成sequel：

SELECT DISTINCT sales_leads.employee_person_id,
    (SELECT full_name from persons 
        WHERE sales_leads.employee_person_id=persons.id),
    (SELECT COUNT (sales_leads.id) from sales_leads 
        WHERE sales_leads.employee_person_id=employees.person_id 
        AND sales_leads.status='open') AS open_leads_count,
    (SELECT COUNT (sales_leads.id) from sales_leads 
        WHERE sales_leads.employee_person_id=employees.person_id 
        AND sales_leads.status='lost' OR sales_leads.status='won') AS closed_leads_count
FROM sales_leads
JOIN employees ON sales_leads.employee_person_id=employees.person_id
ORDER BY sales_leads.employee_person_id;

这就是我到目前为止所做的：

DB[:sales_leads]
  .inner_join(:persons, id: :employee_person_id)
  .select(:full_name)
  .select_append(
    DB[:sales_leads]
      .select(:id)
      .where(Sequel[:sales_leads][:employee_person_id]=>Sequel[:persons][:id])
      .count
  ).all

但我得到了一个错误：

PG:：UndefinedTable:错误：表的子句条目中缺少 “人员”第1行：…eads，其中（“销售线索”。“员工id”= “人”。。。。 ^：从“销售线索”中选择计数（*）作为“计数”，其中 （“销售线索”。“员工id”=“人员”。“id”）限制1 Sequel:：DatabaseError:PG:：UndefinedTable:错误：缺少FROM子句 表“人员”第1行的条目：…eads“其中 （“销售线索”。“员工id”=“人员”。。。。 ^from/home/john/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/sequel-5.5.0/lib/sequel/adapters/postgres.rb:145:in `异步执行'

---

您正在向select#U append调用传递的数据集上调用

Dataset#count

，并且

Dataset#count

运行一个查询。您可能需要

。选择{count（sales#U leads[：id]）

而不是

。count也可以发布ruby​​代码