问题
I have a couple of fields that I would like to replicate dynamically. I'm using ng-reapt which is doing the job. However, the validation messages are not working. Here's what I've got:
<html ng-app="app">
<head>
<title>teste</title>
</head>
<body ng-controller='testController'>
<label>Number of Workers</label>
<select ng-model="quantity" ng-change="changed()">
<option value="1" selected="selected">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<form name='frm' action='/workers/add' method='POST'>
<div ng-repeat="i in numberOfWorkers track by $index">{{$index + 1}}
<div>
<label>First Name</label>
<input class="fullSize" letters-only placeholder="Please enter your name" type="text" name="firstName" ng-model="workers[$index].firstName" ng-minlength="3" ng-maxlength="50" ng-required="true" maxlength="50">
<span ng-cloak class="error-container" ng-show="submitted || showErrors(frm.firstName)">
<small class="error" ng-show="frm.firstName[{{$index}}].$error.required">* Please enter your name.</small>
<small class="error" ng-show="frm.firstName[{{$index}}].$error.minlength">* At least 3 chars.</small>
<small class="error" ng-show="frm.firstName[{{$index}}].$error.maxlength">* No more than 50 chars.</small>
</span>
</div>
<div>
<label>Surname</label>
<input class="fullSize" letters-only placeholder="Please enter your surname" type="text" name="surName" ng-model="workers[$index].surName" ng-minlength="3" ng-maxlength="50" ng-required="true" maxlength="50">
<span ng-cloak class="error-container" ng-show="submitted || showErrors(frm.surName)">
<small class="error" ng-show="frm.surName[$index].$error.required">* Please enter your name.</small>
<small class="error" ng-show="frm.surName[$index].$error.minlength">* At least 3 chars.</small>
<small class="error" ng-show="frm.surName[$index].$error.maxlength">* No more than 50 chars.</small>
</span>
</div>
<div>
<label>Email</label>
<input class="grid-full" placeholder="Please enter your e-mail" type="email" name="email" ng-model="workers[$index].email" ng-minlength="3" ng-maxlength="50" required maxlength="50">
<span class="error-container" ng-show="submitted || showErrors(frm.email)">
<small class="error" ng-show="frm.email[$index].$error.required">* Please enter your E-mail.</small>
<small class="error" ng-show="frm.email[$index].$error.email">* Invalid email.</small>
</span>
</div>
</div>
</form>
<button ng-click="test()">test</button>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<script>
var app = angular.module("app",[]);
app.controller('testController',['$scope', function($scope){
$scope.quantity = 1;
$scope.submitted = false;
$scope.numberOfWorkers = [1];
$scope.workers = [];
$scope.getNumber = function (num) {
return new Array(num);
};
$scope.test = function(){
console.log($scope.workers);
};
$scope.changed = function() {
$scope.workers = [];
$scope.numberOfWorkers = new Array(parseInt($scope.quantity));
}
$scope.isUndefined = function (thing) {
var thingIsUndefined = (typeof thing === "undefined");
return thingIsUndefined;
};
$scope.showErrors = function (field) {
var fieldIsUndefined = $scope.isUndefined(field);
if (fieldIsUndefined == false)
{
var stateInvalidIsUndefined = $scope.isUndefined(field.$invalid);
var stateDirtyIsUndefined = $scope.isUndefined(field.$dirty);
return (fieldIsUndefined == false && stateInvalidIsUndefined == false && stateDirtyIsUndefined == false &&
(field.$invalid && field.$dirty));
}
return false;
};
}]);
</script>
</body>
</html>
Is there a way to display and validate fields using the index position?
frm.firstName.$error.minlength
The code above works for the first block, but it display the message to all copies.
回答1:
I think this along the lines of what you're trying to achieve:
http://plnkr.co/edit/HVwnRfvt30WrsteY6DvW
We need to assign a dynamic name to each input field, by way of using the $index of the ngRepeat:
<form name="form">
<div ng-repeat="entry in array track by $index">
<input type="text" name="someField{{$index}}">
<div>
</form>
And based on the number of entries in array, we can access in a loop each dynamically created someField using the syntax below:
form['someField' + $index]
In your case, let's say we have three workers, and the second worker's firstName is invalid -- in an ngRepeat, it would look like this:
<div ng-repeat="i in numberOfWorkers track by $index">
isValid? --> form.firstName{{$index}}.$valid = {{form['firstName' + $index].$valid}}
</div>
Output:
isValid? --> form.firstName0.$valid = true
isValid? --> form.firstName1.$valid = false
isValid? --> form.firstName2.$valid = true
来源：https://stackoverflow.com/questions/33974247/validation-on-fields-using-index-position