Angular Material 自动完成 md-input-maxlength 不起作用

Question

我尝试将最大长度设置为 Autocomplete 的 Angular Material 并使用休闲配置，但不起作用：

<md-autocomplete md-input-maxlength='10' md-input-name="autocomplete" data-md-selected-item="myItem" data-md-search-text="searchText"
    data-md-items="item in getMatches(list, searchText)">
    <md-item-template>
        {{item}}
    </md-item-template>
</md-autocomplete>

我已停用 document，但无法正常工作。

如何将最大长度设置为Angular Material autocomplete？

Answer 1

您需要使用ng-messages 来显示验证消息

angular.module('MyApp', ['ngMaterial', 'ngMessages', 'material.svgAssetsCache']).controller('DemoCtrl', function($timeout, $q) {
    var self = this;
    self.states = loadAll();
    self.selectedItem = null;
    self.searchText = null;
    self.querySearch = querySearch;
    
    $timeout(function() {
        var inputs = document.querySelectorAll('md-autocomplete[md-input-maxlength]');
        for (var i = 0; i < inputs.length; i++) {
            var minLength = inputs[i].attributes['md-input-minlength'].value,
                maxLength = inputs[i].attributes['md-input-maxlength'].value,
                input = inputs[i].getElementsByTagName('INPUT')[0];
            input.setAttribute('minlength', minLength);
            input.setAttribute('maxlength', maxLength);
        }
    }, 500, false);


    function querySearch(query) {
        var results = query ? self.states.filter(createFilterFor(query)) : self.states;
        var deferred = $q.defer();
        $timeout(function() {
            deferred.resolve(results);
        }, Math.random() * 1000, false);
        return deferred.promise;
    }

    function loadAll() {
        var allStates = 'Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware,\
          Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana,\
          Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana,\
          Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina,\
          North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina,\
          South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia,\
          Wisconsin, Wyoming';

        return allStates.split(/, +/g).map(function(state) {
            return {
                value: state.toLowerCase(),
                display: state
            };
        });
    }

    function createFilterFor(query) {
        var lowercaseQuery = angular.lowercase(query);
        return function filterFn(state) {
            return (state.value.indexOf(lowercaseQuery) === 0);
        };
    }
});

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular-animate.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular-route.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular-aria.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular-messages.min.js"></script>
<script src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/t-114/svg-assets-cache.js"></script>
<script src="https://cdn.gitcdn.link/cdn/angular/bower-material/v1.1.0-rc.5/angular-material.js"></script>
<link rel="stylesheet" type="text/css" href="https://cdn.gitcdn.link/cdn/angular/bower-material/v1.1.0-rc.5/angular-material.css">
<div ng-controller="DemoCtrl as ctrl" layout="column" ng-cloak="" class="autocompletedemoFloatingLabel" ng-app="MyApp">
    <md-content class="md-padding">
        <form ng-submit="$event.preventDefault()" name="searchForm">
            <div layout-gt-sm="row">
                <md-autocomplete flex md-require-match="" md-input-name="autocompleteField" 
                    md-input-minlength="2" md-input-maxlength="6" 
                    md-no-cache="ctrl.noCache"
                    md-selected-item="ctrl.selectedItem" 
                    md-search-text="ctrl.searchText" 
                    md-items="item in ctrl.querySearch(ctrl.searchText)"
                    md-item-text="item.display" 
                    md-floating-label="Favorite state">
                    <md-item-template>
                        <span md-highlight-text="ctrl.searchText">{{item.display}}</span>
                    </md-item-template>
                    <div ng-messages="searchForm.autocompleteField.$error" ng-if="searchForm.autocompleteField.$touched">
                        <div ng-message="required">You <b>must</b> have a favorite state.</div>
                        <div ng-message="md-require-match">Please select an existing state.</div>
                        <div ng-message="minlength">Your entry is not long enough.</div>
                        <div ng-message="maxlength">Your entry is too long.</div>
                    </div>
                </md-autocomplete>
            </div>
        </form>
    </md-content>
</div>