javascript - Angular UI typeahead 下拉菜单不出现

Question

我正在使用 Angular UI's typeahead结合 Web Api 加载搜索结果。我的 Angular 是 1.2.2 版，bootstrap 是 3.1.0 版。我应该提到我也在使用 typescript 。

当我在搜索框中输入内容时，我希望带有建议的下拉菜单会从输入中掉下来。当我检查控制台时，我看到了我返回的数据，问题是没有显示它的下拉菜单。

这是我的 HTML + Angular Directive(指令):

<div class="input-group">
                <input type="text" class="form-control" placeholder="Search" ng-model="selected"
                       data-typeahead="searchResult as searchResult for searchResult in search($viewValue) | filter:$viewValue" >
                <div class="input-group-btn">
                    <button class="btn btn-default" type="submit" ng-click="search(Text)"><i class=" glyphicon glyphicon-search"></i></button>
                </div>
            </div>

这是位于我的 Controller 中的 js 函数:

$scope.search = function (criteria) {
                    controller.dataService.search($scope.employeeId, criteria, function (data) {
                        $scope.searchResult = data;
                });

这是我的数据服务中的搜索功能。

export interface ICommonDataService extends IBaseDataService {
    search(employeeId: string, criteria: string, successCallback: (data: SearchResult) => any);
}

dataservice.ts 信息:

export class DataServicBase {
    public httpService: ng.IHttpService;
    public serviceBase = '/services/api';

    public static $inject = [
        '$http'
    ];

    constructor($http: any) {
        this.httpService = $http;
    }
}

    export class CommonDataService extends DataServicBase implements ICommonDataService {
    public serviceUrl = this.serviceBase + '/common';

    search(employeeId: string, criteria: string, successCallback: (data: SearchResult) => any) {
        this.httpService.get(this.serviceUrl + '/' + employeeId + '/search/' + criteria)
            .success(function (data) {
                successCallback(data);
            });
    }
}

这是 SearchResult 的样子:

// Class
export class SearchResult {
    // Constructor
    constructor(
        public Employees: Employee[],
        public Filters: Employee[],
        public Projects: Project[]
        ) {
    }
}

我得到的错误是这样的:

Error: matches is undefined
.link/getMatchesAsync/<@https://web.plank.local/Scripts/ui-bootstrap-tpls-0.10.0.js:3186
qFactory/defer/deferred.promise.then/wrappedCallback@https://web.plank.local/scripts/angular.js:10655
qFactory/defer/deferred.promise.then/wrappedCallback@https://web.plank.local/scripts/angular.js:10655
qFactory/ref/<.then/<@https://web.plank.local/scripts/angular.js:10741
$RootScopeProvider/this.$get</Scope.prototype.$eval@https://web.plank.local/scripts/angular.js:11634
$RootScopeProvider/this.$get</Scope.prototype.$digest@https://web.plank.local/scripts/angular.js:11479
$RootScopeProvider/this.$get</Scope.prototype.$apply@https://web.plank.local/scripts/angular.js:11740
textInputType/listener@https://web.plank.local/scripts/angular.js:15739
jQuery.event.dispatch@https://web.plank.local/scripts/jquery-2.1.0.js:4371
jQuery.event.add/elemData.handle@https://web.plank.local/scripts/jquery-2.1.0.js:4057
aM@https://cdn.qbaka.net/reporting.js:78

https://web.plank.local/scripts/angular.js
Line 9159

Answer 1

主要问题是您希望预先输入的数据列表不是列表(或未填充)。在我看来， Controller 中的函数 search 应该返回数据，而这只是一个 promise 。您可以尝试 返回 数据，并可以添加 limitToFilter 使其更健壮。而不是将它放在共享的 scope.searchResult 中，而这根本不会被您提前输入。