Question

我有一个像这样的对象数组：

$scope.countries = [{Name: "Taiwan", Cities: ["1","2","3"]}, {Name: "Usa", Cities: ["1","2","3"]}] ;

现在我尝试使用过滤器在城市上制作ng选项：

<input ng-model="search.Name">

代码不起作用：

<select ng-model="selectedCountry" ng-options="o for o in countries.Cities | filter:search:strict"></select>

我设法让它与ng repeat和ul li一起工作，但我遇到了性能问题，因为我的真实阵列对于每个国家都有1500-2000个城市..

Answer 1

如果您想在选择选项中使用单个国家/地区城市，请使用以下代码：

/**
 * System configuration for Angular samples
 * Adjust as necessary for your application needs.
 */
(function (global) {
  System.config({
    paths: {
      // paths serve as alias
      'npm:': 'node_modules/'
    },
    // map tells the System loader where to look for things
    map: {
      // our app is within the app folder
      app: 'app',
      // angular bundles
      '@angular/core': 'npm:@angular/core/bundles/core.umd.js',
      '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
      '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
      '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
      '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
      '@angular/http': 'npm:@angular/http/bundles/http.umd.js',
      '@angular/router': 'npm:@angular/router/bundles/router.umd.js',
      '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
      // other libraries
      'rxjs':                      'npm:rxjs',
      'angular-in-memory-web-api': 'npm:angular-in-memory-web-api',
      'ng2-orm': 'npm:ng2-orm'
    },
    // packages tells the System loader how to load when no filename and/or no extension
    packages: {
      app: {
        main: './main.js',
        defaultExtension: 'js'
      },
      rxjs: {
        defaultExtension: 'js'
      },
      'angular-in-memory-web-api': {
        main: './index.js',
        defaultExtension: 'js'
      },
      'ng2-orm': {
        main: './dist/js/index.js',
        defaultExtension: 'js'
      }
    }
  });
})(this);

Answer 2

试试这个

  <select ng-model="selectedCountry" ng-options="o for o in search.Name.Cities"></select>

对象中的ng选项数组

2 个答案: