Question

我遇到了一个与通过引用更新对象有关的问题，但不确定究竟发生了什么。

我需要删除规则列表，对于日志记录，我需要加载另一个字段

ruleItem.ReferencedItemValue = eventEntity.Title;

当

 builder.LogDelete(showRule, showRuleResource.ToAuditLog(), "Logic Rule");

被称为ReferencedItemValue未填充。

任何想法，建议和替代方案？感谢

CODE：

public void DeleteCustomLogicRule(int[] ruleIds){
    var rules = uow.Context.ShowRules.Where(sr => ruleIds.Contains(sr.Id)).ToList();
    if (rules.Any())
    {
        var showId = rules.FirstOrDefault().ShowId;
        var builder = AuditBuilder.FromShowId(showId);
        rules.ForEach(showRule =>
        {
            var showRuleResource = ToShowRuleResource(showRule);
            FillReferenceValue(showRuleResource);
            builder.LogDelete(showRule, showRuleResource.ToAuditLog(), "Logic Rule");
            });
        uow.Context.SaveChanges();
        builder.ToDatabase();
    }
}

private void FillReferenceValue(ShowRuleResource showRuleResource)
{
    foreach (var ruleItem in showRuleResource.ItemsPredicateAppliesTo.ToList())
    {
        FillRuleItem(ruleItem);
    }
}

private void FillRuleItem(RuleItemResource ruleItem)
{
    var eventEntity = uow.Context.Events.FirstOrDefault(e => e.Id == ruleItem.ReferencedItemId.Value);
    if (eventEntity != null)
    ruleItem.ReferencedItemValue = eventEntity.Title;
}

Answer 1

试试这个：

rules.ForEach(showRule =>
    {
        var item = showRule;
        var showRuleResource = ToShowRuleResource(item);
        FillReferenceValue(showRuleResource);
        builder.LogDelete(item, showRuleResource.ToAuditLog(), "Logic Rule");
        });

Answer 2

从这个功能开始挖掘

private void FillRuleItem(RuleItemResource ruleItem)

这似乎是这种解决方法

var eventEntity = uow.Context.Events.FirstOrDefault(e => e.Id == ruleItem.ReferencedItemId.Value);

为空。

在foreach中更新变量

2 个答案: