流畅的休眠映射问题答案

【问题标题】：fluent nhibernate mapping issue流畅的休眠映射问题
【发布时间】：2011-10-24 01:20:48
【问题描述】：

我有两个对象 Customer_policy 和 policy_maturity。

public class Customer_policy
{
    public virtual String policy_no { get; set; }
    public virtual DateTime maturity_date { get; set; }
    public virtual Boolean matured_status { get; set; }
}

public class Policy_maturity
{
    public virtual string policy_no { get; set; }
    public virtual string customer_id { get; set; }
    public virtual float maturity_amt { get; set; }
    public virtual string policy_type { get; set; }
    public virtual DateTime pay_date { get; set; }
}

当客户创建策略时，Customer_policy 会被填充，但 Policy_maturity 应该保持为空（我已经这样做了）。当政策成熟时，我想在 Policy_maturity 中插入一行并更新相应 Customer_policy 的成熟状态字段。我应该做什么类型的映射，这样插入和更新只需点击一次数据库就可以完成？？？感谢您的建议。

【问题讨论】：

标签： nhibernate mapping fluent

【解决方案1】：

您需要让 NHibernate 批处理这两个 DML 查询。请查看this blog post，了解如何在 NHibernate 中使用批处理的详细说明。

将这两个操作包装在一个事务中（如博文中的示例所做的那样）也是一个好主意。

【讨论】：

【解决方案2】：

一个建议：

public class CustomerPolicy
{
    public virtual String PolicyNumber { get; private set; }
    public virtual DateTime MaturityDate { get; set; }
    public virtual PolicyMaturity Maturity { get; private set; }

    public virtual Boolean HasMatured { get { return Maturity != null; } }

    public virtual void DoMature(Customer customer, float maturity_amt, string policyType, DateTime payDate)
    {
        DoMature(new PolicyMaturity
        {
            Customer = customer,
            MaturityAmt = maturity_amt,
            PolicyType = policyType,
            PayDate = payDate,
        });
    }
    /*public*/ virtual void DoMature(PolicyMaturity maturity)
    {
        Maturity = maturity;
        MaturityDate = DateTime.Today;
    }
}

public class PolicyMaturity
{
    public virtual String PolicyNumber { get; private set; }
    public virtual CustomerPolicy Policy { get; set; }
    public virtual Customer Customer { get; set; }
    public virtual float MaturityAmt { get; set; }
    public virtual string PolicyType { get; set; }
    public virtual DateTime PayDate { get; set; }
}

class CustomerPolicyMap : ClassMap<CustomerPolicy>
{
    public CustomerPolicyMap()
    {
        Id(cp => cp.PolicyNumber).GeneratedBy.Assigned();

        Map(cp => cp.MaturityDate);
        HasOne(cp => cp.Maturity);
    }
}

class PolicyMaturityMap : ClassMap<PolicyMaturity>
{
    public PolicyMaturityMap()
    {
        Id(cp => cp.PolicyNumber).GeneratedBy.Foreign("Policy");

        HasOne(cp => cp.Policy);

        References(cp => cp.Customer);
        Map(cp => cp.MaturityAmt);
        Map(cp => cp.PayDate);
        Map(cp => cp.PolicyType);
    }
}

那么如果你保存更新后的 Customerpolicy NHibernate 应该批处理这两个更新

【讨论】：