不需要的属性不断获取data-val-required属性

Question

这是验证的模型:

[MetadataType(typeof(TagValidation))]
public partial class Tag
{
}

public class TagValidation
{
        [Editable(false)]
        [HiddenInput(DisplayValue = false)]
        public int TagId { get; set; }

        [Required]
        [StringLength(20)]
        [DataType(DataType.Text)]
        public string Name { get; set; }
    //...
}

这是观点:

    <h2>Create</h2>

<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>

@using (Html.BeginForm()) {
    @Html.ValidationSummary(true)
    <fieldset>
        <legend>Tag</legend>

        <div>@Html.EditorForModel()</div>

        <p>
            <input type="submit" value="Create" />
        </p>
    </fieldset>
}

<div>
    @Html.ActionLink("Back to List", "Index")
</div>

这是得到的渲染:

<form action="/Tag/Create" method="post">
    <fieldset>
        <legend>Tag</legend>
        <div><input data-val="true" data-val-number="The field TagId must be a number." data-val-required="The TagId field is required." id="TagId" name="TagId" type="hidden" value="" />

        <div class="editor-label"><label for="Name">Name</label></div>
        <div class="editor-field"><input class="text-box single-line" data-val="true" data-val-length="The field Name must be a string with a maximum length of 20." data-val-length-max="20" data-val-required="The Name field is required." id="Name" name="Name" type="text" value="" /> <span class="field-validation-valid" data-valmsg-for="Name" data-valmsg-replace="true"></span></div>            
    ...
    </fieldset>
</form>

问题是TagId验证是生成的,但是没有在TagId属性上设置必需属性.因此我甚至无法通过客户端验证来在db中创建新的Tag.我错过了什么？

Answer 1

我找到了答案.只需将其添加到Application_Start:

DataAnnotationsModelValidatorProvider.AddImplicitRequiredAttributeForValueTypes = false;

Answer 2

使视图模型值类型可以为空.然后默认情况下它们不是必需的.

另请注意,如果在html 5中放置属性'required ="false"'(如果在doctype元数据中设置html 5),则会看到"required"并使其成为必需项.您可以使用dojo-data-props ="required:false".

Answer 3

frennky的解决方案只删除data-val-required，但在我的情况下，我仍然有data-val-number和data-val

我必须将以下两行添加到Application_Start来摆脱所有内容。

ModelValidatorProviders.Providers.Clear();
ModelValidatorProviders.Providers.Add(new DataAnnotationsModelValidatorProvider());