如果项目被 ng-repeat 中的另一个选择框选中，则从 ng-option 中删除/隐藏该项目

Question

How to remove/hide the item from ng-option inside ng-repeat if item is selected by another ng-option?如果项目被另一个 ng-option 选择，如何从 ng-repeat 中的 ng-option 中删除/隐藏项目？

    <table class="table table-bordered table-condensed">
      <tr>
        <th>Column Name</th>
        <th>Map to field</th>
      </tr>
      <tr ng-repeat="head in headers">
        <td>{{ head }}</td>
        <td>
          <select ng-model="selectedColumn[head]" 
            ng-change="selectColumn(selectedColumn[head])" 
            ng-options="row for row in data">
            <option value="">select</option>
          </select>
        </td>
      </tr>
    </table>

    $scope.headers = ["foo", "bar", "baz"]; 
    $scope.data =["alpha", "beta", "gamma"]; 
    $scope.selectedColumn = {};

    $scope.selectColumn = function(selectedhead) { 
      // $scope.fileData.headers.splice(selectedhead); 
      $scope.data = $scope.data.filter(function(item){ 
        return !selectedhead || !angular.equals(item, selectedhead); 
      }); 
    }

from above code the item get removed from data, however the shows select.kindly advise, thanks in advance从上面的代码中，该项目从数据中删除，但是显示选择。请告知，提前致谢

Answer 1

The above code does the job.上面的代码完成了这项工作。 I assume your question is, after removing all elements from $scope.data you don't want the user to access that dropdown which shows 'select', right?我假设您的问题是，从$scope.data删除所有元素后，您不希望用户访问显示“选择”的下拉列表，对吗？

All you need to do is disable the <select> tag when the $scope.data array gets empty.您需要做的就是在$scope.data数组变空时禁用<select>标记。

The Code is illustrated bellow -守则如下图所示 -

 var app = angular.module("myApp", []); app.controller('testCtrl', ['$scope', function ($scope) { $scope.headers = ["foo", "bar", "baz"]; $scope.data =["alpha", "beta", "gamma"]; $scope.selectedColumn = {}; $scope.emptyArr=false; $scope.selectColumn = function(selectedhead) { // $scope.fileData.headers.splice(selectedhead); $scope.data = $scope.data.filter(function(item){ return !selectedhead || !angular.equals(item, selectedhead); }); console.log($scope.data); if($scope.data==""){ // this disables the <select> tag $scope.emptyArr=true; } } }]);

 <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script> <div ng-app="myApp" ng-controller="testCtrl"> <table class="table table-bordered table-condensed"> <tr> <th>Column Name</th> <th>Map to field</th> </tr> <tr ng-repeat="head in headers"> <td>{{ head }}</td> <td> <select ng-model="selectedColumn[head]" ng-change="selectColumn(selectedColumn[head])" ng-options="row for row in data" ng-disabled="emptyArr"> <option value="">select</option> </select> </td> </tr> </table> </div>

Hope That's what you asked for.. Cheers!希望这就是你所要求的..干杯！

~ NiKhIL 〜镍

Answer 2

s index.html s index.html

    <!DOCTYPE html>
    <html>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>

    <link rel="stylesheet" href="style.css"></style>
    <body>
        <div ng-app="App"  ng-controller="selectController">
            <div class="container">
                <div class="row">
                    <div class="col-12">
                        <table class="table table-bordered table-condensed">
                            <tr>
                            <th>Column Name</th>
                            <th>Map to field</th>
                            </tr>
                            <tr ng-repeat="head in headers">
                            <td>{{ head }}</td>
                            <td>
                                <select ng-model="selectedColumn[head]" 
                                    class="form-control"
                               ng-options="opt for opt in filterRow(head)">
                                <option value="">select</option>
                                </select>
                            </td>
                            </tr>
                        </table>
                    </div>
                </div>
            </div>

        </div>  
    <script>
    var app = angular.module('App', []);

    app.controller('selectController', function($scope) {
        $scope.headers = ["foo", "bar", "baz"]; 
        $scope.data =["alpha", "beta", "gamma"]; 
        $scope.selectedColumn = {};

        // use this insted
        $scope.filterRow = function(head) { 
            return $scope.data.filter(function(d) {
                return !(Object.values($scope.selectedColumn)).includes(d) || $scope.selectedColumn[head] === d;
            })
        }
    });
    </script>

    </body>
    </html>

如果项目被 ng-repeat 中的另一个选择框选中，则从 ng-option 中删除/隐藏该项目

问题描述

2 个解决方案

解决方案1
0 2018-08-20 13:33:20

解决方案2
0 已采纳 2019-12-26 05:15:59

如果项目被 ng-repeat 中的另一个选择框选中，则从 ng-option 中删除/隐藏该项目

问题描述

2 个解决方案

解决方案1 0 2018-08-20 13:33:20

解决方案2 0 已采纳 2019-12-26 05:15:59

解决方案1
0 2018-08-20 13:33:20

解决方案2
0 已采纳 2019-12-26 05:15:59