Question

我有以下课程;

public class PricingRuleNumberRange
{
    public decimal? FromValue { get; private set; }
    public decimal? ToValue { get; private set; }

    protected PricingRuleNumberRange() {}

    public PricingRuleNumberRange(decimal? fromValue, decimal? toValue)
    {
        FromValue = fromValue;
        ToValue = toValue;
    }

    ...
}

使用所述类的模型;

public class PricingRule
{
    public PricingRuleNumberRange LVR { get; private set; }

    protected PricingRule() { }

    public PricingRule(...)
    {
        ...
    }

    public void UpdateDetails(PricingRuleNumberRange lvr)
    {
        LVR = lvr;
    }
}

我可以向PricingRuleNumberRange添加新的PricingRule属性并调用Add-Migration，它会检测并支持更改而不会出现问题。但是，我现在需要添加另一个PricingRuleNumberRange属性，该属性仅为int，而不是decimal。我认为将PricingRuleNumberRange转换为通用类是可以接受的，但Add-Migration现在会删除LVR属性/列。

这是新代码;

public class PricingRuleNumberRange<T> where T : struct, IComparable<T>
{
    public T? FromValue { get; private set; }
    public T? ToValue { get; private set; }

    protected PricingRuleNumberRange() {}

    public PricingRuleNumberRange(T? fromValue, T? toValue)
    {
        FromValue = fromValue;
        ToValue = toValue;
    }

    ...
}

public class PricingRule
{
    public PricingRuleNumberRange<decimal> LVR { get; private set; }
    public PricingRuleNumberRange<int> NewCol { get; private set; }

    protected PricingRule() { }

    public PricingRule(...)
    {
        ...
    }

    public void UpdateDetails(PricingRuleNumberRange<decimal> lvr)
    {
        LVR = lvr;
    }
}

由于我在属性声明中指定int / decimal，我认为它仍然可以提取它，但显然不是。我怀疑我可能需要在DbContext.OnModelCreating()方法中执行某些操作，或者可能会为某些属性添加一些属性以使其起作用？

EF Add-Migration不检测泛型

0 个答案: