角度验证：如果动态添加所需的属性，验证将失败
[英]Angular validation: if dynamically add required attribute validation will break
问题描述
Trying to dynamically add validation to input file if I choose first option from select. 
如果我从select中选择第一个选项，则尝试向输入文件动态添加验证。 But if I add required attribute, it still ng-valid in class. 但是，如果我添加了required属性，则它在类中仍为ng-valid 。 If I load file to input file, it still ng-empty . 如果我将文件加载到输入文件，则仍为ng-empty 。 What's wrong? 怎么了？ http://plnkr.co/edit/pjyCULes60jWf7yqNsyB?p=preview http://plnkr.co/edit/pjyCULes60jWf7yqNsyB?p=preview
1 个解决方案
解决方案1
1 2016-05-25 08:31:26
The form validation in AngularJS depends on the ngModel attribute, which doesn't work with input type=file . AngularJS中的表单验证取决于ngModel属性，该属性不适用于input type=file 。
To solve this, either use ngFileUpload which helps you solve other problems you'll encounter with file upload in Angular as well, or see this or that answer. 要解决此问题，请使用ngFileUpload（它可以帮助您解决在Angular中上传文件时也会遇到的其他问题），或者查看此或该答案。
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