javascript 验证不适用于具有“必需”属性的文件输入 - AngularJS
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Validation doesnt work for File Input with 'Required' attribute- AngularJS
提问by Neel
I have been playing around this and couldnt get it to work. I was creating an angular form and I was able to get the validation to work when requiredattribute is added to the text field. However, if a input type fileis added with requiredattribution, I noticed that the $error.requiredtext is shown but it doesnt validation even if a file is chosen. Its still showing as invalid even after adding a file. I have created a sample in jsfiddle so you can check this out: http://jsfiddle.net/Alien_time/kxSaz/6/
我一直在玩这个，但无法让它工作。我正在创建一个有角度的表单，当required属性添加到文本字段时，我能够使验证工作。但是，如果输入类型file添加了required属性，我注意到会显示$error.required文本，但即使选择了文件也不会验证。即使添加了文件，它仍然显示为无效。我在 jsfiddle 中创建了一个示例，因此您可以查看：http: //jsfiddle.net/Alien_time/kxSaz/6/
Doesnt validation work for file inputs? How can I add a required option and validate it when using file select?
文件输入的验证不起作用吗？如何在使用文件选择时添加所需选项并验证它？
回答by Jake Johnson
ngModelControllerdoesn't currently support input type=file.
ngModelController当前不支持输入类型=文件。
you can solve your issue with a custom directive.
您可以使用自定义指令解决您的问题。
app.directive('validFile',function(){
return {
require:'ngModel',
link:function(scope,el,attrs,ngModel){
el.bind('change',function(){
scope.$apply(function(){
ngModel.$setViewValue(el.val());
ngModel.$render();
});
});
}
}
});
