AngularJS中一个页面可以有多个Form，且Form之间还可以嵌套，对于多个Form我们在提交时，通过什么方式来判断校验是否都通过了呢？
一.并列Form的校验控制
并列Form对当前的Controller来说是可见了，因此可以直接根据Form的$valid进行判断。
app.js
var myApp=angular.module('myModule', ['ui.bootstrap']);
myApp.controller('myCtrl',function($scope){
$scope.model = {
submitButtonIsDisable : true
};
$scope.reset=function(){ //表单重置
$scope.user={account:'',email:''};
};
$scope.$watch(
function() {
if(!$scope.myform.$valid || !$scope.myform2.$valid) {
$scope.model.submitButtonIsDisable = true;
}else {
$scope.model.submitButtonIsDisable = false;
}
}
);
});
angular.element(document).ready(function() {
angular.bootstrap(document,['myModule']);
});
formValidation01.html
<html>
<head>
<title>多同级表单验证</title>
<link rel="stylesheet" href="lib/bootstrap-3.0.0/css/bootstrap.css">
<style>
#css_form input.ng-invalid.ng-dirty {
background-color: #FFC0CB;
}
#css_form input.ng-valid.ng-dirty {
background-color: #78FA89;
}
</style>
</head>
<body ng-controller="myCtrl">
<div class="panel panel-primary">
<div class="panel-heading">
<div class="panel-title">多同级表单验证</div>
</div>
<div class="panel-body">
<div class="row">
<form id="css_form" class="form-horizontal" novalidate name="myform" role="form">
<div class="form-group">
<label for="inputAccount" class="col-md-2 control-label">账号：</label>
<div class="col-md-2">
<!--输入框 -->
<input type="number" ng-model="user.account" min="3" max="6" name="myAccount" required class="form-control" id="inputAccount" placeholder="请输入3-6的整数"/>
</div>
<!-- 隐藏块，显示验证信息-->
<div class="alert alert-danger well-sm" ng-show="myform.myAccount.$error.required">账号不能为空！</div>
<div class="alert alert-danger well-sm" ng-show="myform.myAccount.$error.min || myform.myAccount.$error.max">输入值必须在3-6之间!</div>
</div>
</form>
<form id="css_form" class="form-horizontal" novalidate name="myform2" role="form">
<div class="form-group">
<label for="inputEmail" class="col-md-2 control-label">邮箱：</label>
<div class="col-md-2">
<!--输入框 -->
<input type="email" ng-model="user.email" name="myEmail" required class="form-control" id="inputEmail" placeholder="请输入邮箱地址"/>
</div>
<!-- 隐藏块，显示验证信息-->
<div class="alert alert-danger well-sm" ng-show="myform2.myEmail.$error.required">邮箱不能为空！</div>
<div class="alert alert-danger well-sm" ng-show="myform2.myEmail.$error.email">邮箱格式不正确!</div>
</div>
</form>
<!--按钮组-->
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<button class="btn btn-default" ng-disabled="model.submitButtonIsDisable">提交</button>
<button class="btn btn-default" ng-click="reset()">重置</button>
</div>
</div>
</div>
</div>
</div>
<script type='text/javascript' src='lib/angular/angular.js'></script>
<script type='text/javascript' src='lib/bootstrap-gh-pages/ui-bootstrap-tpls-0.10.0.js'></script>
<script type='text/javascript' src='app.js'></script>
</body>
</html>
运行结果：
二.嵌套Form的校验
嵌套的Form与被嵌套的Form同名，这样的对Form的操作和同一个Form一样。
app.js
var myApp=angular.module('myModule', ['ui.bootstrap']);
myApp.controller('myCtrl',function($scope){
$scope.reset=function(){ //表单重置
$scope.user={account:'',email:''};
};
});
angular.element(document).ready(function() {
angular.bootstrap(document,['myModule']);
});
formValidation03.html
<html>
<head>
<title>嵌套表单验证</title>
<link rel="stylesheet" href="lib/bootstrap-3.0.0/css/bootstrap.css">
<style>
#css_form input.ng-invalid.ng-dirty {
background-color: #FFC0CB;
}
#css_form input.ng-valid.ng-dirty {
background-color: #78FA89;
}
</style>
</head>
<body ng-controller="myCtrl">
<div class="panel panel-primary">
<div class="panel-heading">
<div class="panel-title">表单验证</div>
</div>
<div class="panel-body">
<div class="row">
<form id="css_form" class="form-horizontal" novalidate name="myform" role="form">
<div class="form-group">
<label for="inputAccount" class="col-md-2 control-label">账号：</label>
<div class="col-md-2">
<!--输入框 -->
<input type="number" ng-model="user.account" min="3" max="6" name="myAccount" required class="form-control" id="inputAccount" placeholder="请输入3-6的整数"/>
</div>
<!-- 隐藏块，显示验证信息-->
<div class="alert alert-danger well-sm" ng-show="myform.myAccount.$error.required">账号不能为空！</div>
<div class="alert alert-danger well-sm" ng-show="myform.myAccount.$error.min || myform.myAccount.$error.max">输入值必须在3-6之间!</div>
</div>
<form id="css_form" class="form-horizontal" novalidate name="myform" role="form">
<div class="form-group">
<label for="inputEmail" class="col-md-2 control-label">邮箱：</label>
<div class="col-md-2">
<!--输入框 -->
<input type="email" ng-model="user.email" name="myEmail" required class="form-control" id="inputEmail" placeholder="请输入邮箱地址"/>
</div>
<!-- 隐藏块，显示验证信息-->
<div class="alert alert-danger well-sm" ng-show="myform.myEmail.$error.required">邮箱不能为空！</div>
<div class="alert alert-danger well-sm" ng-show="myform.myEmail.$error.email">邮箱格式不正确!</div>
</div>
</form>
</form>
<!--按钮组-->
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<button class="btn btn-default" ng-disabled="!myform.$valid">提交</button>
<button class="btn btn-default" ng-click="reset()">重置</button>
</div>
</div>
</div>
</div>
</div>
<script type='text/javascript' src='lib/angular/angular.js'></script>
<script type='text/javascript' src='lib/bootstrap-gh-pages/ui-bootstrap-tpls-0.10.0.js'></script>
<script type='text/javascript' src='app.js'></script>
</body>
</html>
运行结果：一切OK
但实际上不同名称的Form嵌套才算是真正的嵌套，下面我们来看嵌套Form与被嵌套Form名称不同的情况。
app.js同上实例
formValidation01.html
<html>
<head>
<title>嵌套表单验证</title>
<link rel="stylesheet" href="lib/bootstrap-3.0.0/css/bootstrap.css">
<style>
#css_form input.ng-invalid.ng-dirty {
background-color: #FFC0CB;
}
#css_form input.ng-valid.ng-dirty {
background-color: #78FA89;
}
</style>
</head>
<body ng-controller="myCtrl">
<div class="panel panel-primary">
<div class="panel-heading">
<div class="panel-title">嵌套表单验证</div>
</div>
<div class="panel-body">
<div class="row">
<form id="css_form" class="form-horizontal" novalidate name="myform" role="form">
<div class="form-group">
<label for="inputAccount" class="col-md-2 control-label">账号：</label>
<div class="col-md-2">
<!--输入框 -->
<input type="number" ng-model="user.account" min="3" max="6" name="myAccount" required class="form-control" id="inputAccount" placeholder="请输入3-6的整数"/>
</div>
<!-- 隐藏块，显示验证信息-->
<div class="alert alert-danger well-sm" ng-show="myform.myAccount.$error.required">账号不能为空！</div>
<div class="alert alert-danger well-sm" ng-show="myform.myAccount.$error.min || myform.myAccount.$error.max">输入值必须在3-6之间!</div>
</div>
<form id="css_form" class="form-horizontal" novalidate name="myform2" role="form">
<div class="form-group">
<label for="inputEmail" class="col-md-2 control-label">邮箱：</label>
<div class="col-md-2">
<!--输入框 -->
<input type="email" ng-model="user.email" name="myEmail" required class="form-control" id="inputEmail" placeholder="请输入邮箱地址"/>
</div>
<!-- 隐藏块，显示验证信息-->
<div class="alert alert-danger well-sm" ng-show="myform2.myEmail.$error.required">邮箱不能为空！</div>
<div class="alert alert-danger well-sm" ng-show="myform2.myEmail.$error.email">邮箱格式不正确!</div>
</div>
</form>
</form>
<!--按钮组-->
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<button class="btn btn-default" ng-disabled="!myform.$valid && !myform2.$valid">提交</button>
<button class="btn btn-default" ng-click="reset()">重置</button>
</div>
</div>
</div>
</div>
</div>
<script type='text/javascript' src='lib/angular/angular.js'></script>
<script type='text/javascript' src='lib/bootstrap-gh-pages/ui-bootstrap-tpls-0.10.0.js'></script>
<script type='text/javascript' src='app.js'></script>
</body>
</html>
运行效果：提交按钮的状态控制正确，但被嵌套Form的验证信息一直没有显示。修改formValidation01.html，在被嵌套的myform2上加一个Controller，效果也一样。
进一步调试跟踪发现，当前$scope下只有myform，而没有myform2，如下所示：
当然，如果在被嵌套的form上加一个控制器，并修改被嵌套的form的name与嵌套form的name一样，一切OK。但这样的话，为什么要嵌套一个form还加一个多余的controller呢？这些都是多余的。