我有两个动态选择字段。从列表中加载第一个选择字段,然后根据您选择的内容填充第二个选择字段。
我有一个问题,如果第二选择字段中没有任何选项,但我想隐藏第二选择字段,则我想隐藏它
我尝试过ng-if="caseDetails.Subcategory1.length === 0"
(这会隐藏控件,如果有选项,则不会显示任何内容)和ng-if="caseDetails.Subcategory1.length < 1"
主要选择域代码
<select class="form-control ng-pristine ng-valid ng-empty ng-touched"
id="exampleFormControlSelect8"
ng-options="caseType for caseType in caseTypes"
ng-model="caseDetails.Casetype"
ng-change="onCaseTypeChanged()">
<option value="?" selected="selected"></option>
<option label="option1" value="string:option1">option1</option>
<option label="option2" value="string:option2">option2</option>
<option label="option3" value="string:option3">option3</option>
<option label="option4" value="string:option4">option4</option>
</select>
下面是没有选项但始终加载空白选项的代码。
<select ng-options="subCategory for subCategory in getPrimaryCategories()"
ng-model="caseDetails.Subcategory1"
ng-change="onPrimaryCategoryChanged()">
<option value="?" selected="selected"></option>
</select>
下面是带有选项的代码
<select ng-options="subCategory for subCategory in getPrimaryCategories()"
ng-model="caseDetails.Subcategory1"
ng-change="onPrimaryCategoryChanged()">
<option value="?" selected="selected"></option>
<option label="option1" value="string:option1">option1</option>
<option label="option2" value="string:option2">option2</option>
<option label="option3" value="string:option3">option3</option>
<option label="option4" value="string:option4">option4</option>
</select>
$scope.getPrimaryCategories = function(){
var matches = [];
var mappings = $scope.caseTypeMappings;
for(var i = 0; i < mappings.length; i++){
var mapping = mappings[i];
if(mapping.Casetype == $scope.caseDetails.Casetype && mapping.Subcategory1 != null) {
for(var j = 0; j < mapping.Subcategory1.length; j++){
if(mapping.Subcategory1[j] && matches.indexOf(mapping.Subcategory1[j]) < 0) {
matches.push(mapping.Subcategory1[j]);
}
}
}
}
return matches;
}
答案 0 :(得分:0)
保存getPrimaryCategories()
函数的结果,并使用其长度显示控件:
<select ng-options="subcat for subcat in (subcatArr = getPrimaryCategories())"
ng-show="subcatArr.length"
ng-model="caseDetails.Subcategory1"
ng-change="onPrimaryCategoryChanged()">
</select>