书呆子晚餐没有发现错误

发布于 2024-08-22 14:50:12 字数 1169 浏览 0 评论 0原文

我正在阅读《Professional ASP.NET MVC 1.0》一书第 1 章中的“处理编辑错误”（第 67 页），但遇到了问题。

问题是，当我编辑晚餐并单击“保存”时，即使我将标题留空，它也不会捕获任何表单错误。 UpdateModel(dinner) 或dinnerRepository.Save() 都不会抛出错误。

当我保存后检查数据库时，标题字段确实为空。如何才能在不引发错误的情况下发生这种情况？

任何帮助将不胜感激。编辑下面的代码：

[AcceptVerbs(HttpVerbs.Post)]
    public ActionResult Edit(int id, FormCollection formValues)
    {
        Dinner dinner = dinnerRepository.GetDinner(id);

        try
        {
            UpdateModel(dinner);
            dinnerRepository.Save();
            return RedirectToAction("Details", new { id = dinner.DinnerID });
        }
        catch
        {
            foreach (var issue in dinner.GetRuleViolations())
            {
                ModelState.AddModelError(issue.PropertyName, issue.ErrorMessage);
            }

            return View(dinner);
        }            
    }

发现问题 - 事实上，我的部分是一个 N00B 错误。由于一些奇怪的原因，我注释掉了以下代码：

 partial void OnValidate(ChangeAction action)
    {
        if (!IsValid)
            throw new ApplicationException("Rule violations prevent saving");
    }

难怪它没有捕获错误...... 感谢 RememberMe 尝试提供帮助！我很感激。

原文

I'm at the "Handling Edit Errors" (page 67) in chapter 1 of the Professional ASP.NET MVC 1.0 book and I'm running into a problem.

The problem is that when I'm editing a dinner and I click save, it's not catching any of the form errors, even though I left the Title blank. Neither UpdateModel(dinner) or dinnerRepository.Save() throws an error.

When I check the db after the save, the Title field is indeed empty. How can that happen without throwing an error?

Any help would be appreciated. Edit code below:

[AcceptVerbs(HttpVerbs.Post)]
    public ActionResult Edit(int id, FormCollection formValues)
    {
        Dinner dinner = dinnerRepository.GetDinner(id);

        try
        {
            UpdateModel(dinner);
            dinnerRepository.Save();
            return RedirectToAction("Details", new { id = dinner.DinnerID });
        }
        catch
        {
            foreach (var issue in dinner.GetRuleViolations())
            {
                ModelState.AddModelError(issue.PropertyName, issue.ErrorMessage);
            }

            return View(dinner);
        }            
    }

Found the problem - It was, in fact, a N00B error on my part. I had the following code commented out for some strange reason:

 partial void OnValidate(ChangeAction action)
    {
        if (!IsValid)
            throw new ApplicationException("Rule violations prevent saving");
    }

No wonder it wasn't catching the errors...
Thanks to RememberMe for trying to help out! I appreciate it.

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守护在此方 2024-08-29 14:50:12

在您的模型中，您是否检查了该条件？

public IEnumerable<RuleViolation> GetRuleViolations()
        {
            if (String.IsNullOrEmpty(title.Trim()))
                yield return new RuleViolation("Dinner Title is required", "title");

            yield break;
        }

编辑：
看起来违规行为从未被添加，只是被计数。试试这个：

if (ModelState.IsValid)
            {

                try
                {
                    ...
                }
                catch
                {
                    ModelState.AddModelErrors(dinner.GetRuleViolations());
                }
            }
            else
            {
                ModelState.AddModelErrors(dinner.GetRuleViolations());
            }

In your model, do you have a check for that condition?

public IEnumerable<RuleViolation> GetRuleViolations()
        {
            if (String.IsNullOrEmpty(title.Trim()))
                yield return new RuleViolation("Dinner Title is required", "title");

            yield break;
        }

EDIT:
Looks like the violations were never being added, just counted. Try this:

if (ModelState.IsValid)
            {

                try
                {
                    ...
                }
                catch
                {
                    ModelState.AddModelErrors(dinner.GetRuleViolations());
                }
            }
            else
            {
                ModelState.AddModelErrors(dinner.GetRuleViolations());
            }

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