Drools规则逻辑未按预期工作

层次结构：
如果任何员工的工资为10万英镑，则Organization.maxSalary=10万英镑。
如果任何员工的工资为50k，如果没有其他人收到100k，则Organization.maxSalary=50k

DRL

rule "Salary 100000"
    when
        $org: Organization()
        $empDetail: EmployeeDetail() from $org.employeeDetail
        $employee: Employee( $org.maxSalary != 100000,
                             salary == 100000
                           ) from $empDetail.employees
    then
        System.out.println("Salary 100000: " + $org.maxSalary);
        $org.maxSalary = 100000;
end

rule "Salary 50000"
    when
        $org: Organization()
        $empDetail: EmployeeDetail() from $org.employeeDetail
        $employee: Employee( $org.maxSalary != 100000
                          && $org.maxSalary != 50000,
                             salary == 50000
                           ) from $empDetail.milestoneDetails
    then
        System.out.println("Salary 50000: " + $org.maxSalary);
        $org.maxSalary = 50000;
end

输入JSON 1:

{
  "Organization": {
    "EmployeeDetail": {
      "Employees" : [
        {
          "name": "willie"
          "salary": "50000",
        },
        {
          "name": "john"
          "salary": "100000",
        },
        {
          "name": "jack"
          "salary": "50000",
        },
        {
          "name": "jim"
          "salary": "50000",
        }
      ]
    }
  }
}

{
  "Organization": {
    "EmployeeDetail": {
      "Employees" : [
        {
          "name": "willie"
          "salary": "50000",
        },
        {
          "name": "jack"
          "salary": "50000",
        },
        {
          "name": "jim"
          "salary": "50000",
        }
      ]
    }
  }
}

预期控制台输出：

100000:null

实际控制台输出：

100000:null

一切都好

输入JSON 2:

{
  "Organization": {
    "EmployeeDetail": {
      "Employees" : [
        {
          "name": "willie"
          "salary": "50000",
        },
        {
          "name": "john"
          "salary": "100000",
        },
        {
          "name": "jack"
          "salary": "50000",
        },
        {
          "name": "jim"
          "salary": "50000",
        }
      ]
    }
  }
}

{
  "Organization": {
    "EmployeeDetail": {
      "Employees" : [
        {
          "name": "willie"
          "salary": "50000",
        },
        {
          "name": "jack"
          "salary": "50000",
        },
        {
          "name": "jim"
          "salary": "50000",
        }
      ]
    }
  }
}

预期控制台输出：

50000:null

实际控制台输出：

---

在这两种情况下，如果

Organization.maxSalary

设置正确，JSON结果都很好。但是为什么控制台输出奇怪呢？

您想通过检查org.maxSalary来触发规则。但是，您不应该从Employee对象内部检查$org.maxSalary，因为这不是Eployee的属性，而是Orgranization的属性

此外，在组织上设置maxSalary后，您应该使用新值（maxSalary）更新组织事实<代码>更新（）使规则引擎知道事实已被修改

这是完整的规则代码

rule "Salary 100000"
    when
        $org: Organization(maxSalary != 100000)
        $empDetail: EmployeeDetail() from $org.employeeDetail
        $employee: Employee( salary == 100000
                           ) from $empDetail.employees
    then
        System.out.println("Salary 100000: " + $org.maxSalary);
        $org.maxSalary = 100000;
        update($org);
end

rule "Salary 50000"
    when
        $org: Organization(maxSalary != 100000 && maxSalary != 50000)
        $empDetail: EmployeeDetail() from $org.employeeDetail
        $employee: Employee(
                             salary == 50000
                           ) from $empDetail.employees
    then
        System.out.println("Salary 50000: " + $org.maxSalary);
        $org.maxSalary = 50000;
        update($org);

end

Json2上的输出是

Salary 50000: null

我也不明白有这样的逻辑

 System.out.println("Salary 50000: " + $org.maxSalary);
 $org.maxSalary = 50000;

而不是

 $org.maxSalary = 50000;
 System.out.println("Salary 50000: " + $org.maxSalary);

---

首先打印一个空的maxSalary，然后将金额分配给maxSalary，这似乎很奇怪。

下面是您提供的代码的输出，更奇怪的是：Salary 100000:null；工资50000:100000；工资50000:50000；工资50000:50000；$org.maxSalary被错误地设置为50000。System.out和我在这里发布的代码不是我的实际用例。这只是一个例子来说明我遇到的奇怪情况，我想知道我是否做错了什么。$empDetail.milestoneDetails和$empDetail.employees之间有什么区别？工资和最高工资是什么类型的？它们是弦吗？我将尝试运行您的代码

Salary 50000:null

maxSalary不是原语，它是一个包含数字或字符串的对象吗？我错过了update（$org）语句。我更新了我的答案，看看这个：）完美。多谢。