自定义指令选择需要 [英] required on custom directive select
问题描述
我使用无序列表和 ng-repeat 创建了自己的选择下拉列表.该指令的问题在于它不能作为普通的 select/input/textarea 工作,您可以在 html 表单中使用 required 时使用它.
那么我如何实现选项 required/ng-required(作为指令)并验证自定义指令?
我应该使用自己的验证实现吗?
dropdown.html
<div class="title"ng-class="{'placeholder': !hasSelected(), 'selected': isOpened}"ng-mousedown="openSelect()">{{getTitle()}}<div class="icon" ng-class="{'active': isOpened}"><i class="fa fa-caret-down"></i>
<!-- 打开选择下拉菜单时显示的选项--><div class="选项"><ul ng-show="isOpened"><!-- 只有在需要空选项时才显示第一个选项 --><li ng-click="select(null)"ng-show="hasEmptyOption() && isSelected()"类=空">{{空的}}<!-- 选择的选项--><li ng-repeat="$index 选项中的选项"ng-click="选择($index)"ng-class="{'active': isActive($index)}">{{选项}}
dropdown.js
app.module.directive('dropdown', ['$document',功能($文档){'使用严格';返回{限制:E",范围: {型号:=",空的: "@",信息: "@",选项:="},templateUrl: 'app/common/directive/dropdown/dropdown.partial.html',链接:函数(范围,元素,属性){scope.message = "我的消息";scope.isOpened = false;scope.isSelected = 函数 () {返回 scope.model &&scope.model !== null;};scope.hasEmptyOption = 函数 () {返回 scope.empty &&scope.empty !== null;};scope.hasSelected = 函数 () {返回(范围.selected);};scope.select = 函数(索引){如果(索引!== 空){scope.model = scope.options[index];} 别的 {scope.model = null;}范围.closeSelect();};scope.closeSelect = function () {scope.isOpened = false;$document.unbind('点击');elem.unbind('点击');};scope.openSelect = 函数 () {如果(范围.isOpened){范围.closeSelect();} 别的 {scope.isOpened = true;$document.bind('click', function () {范围.closeSelect();范围.$应用();});elem.bind('click', function (e) {e.stopPropagation();});}};scope.getTitle = 函数 () {if (scope.model && scope.model !== null) {返回范围.模型;} else if (scope.message) {返回范围.消息;} 别的 {返回选择";}};}};}]);
使用
<dropdown message="Select state" model="selectedState" options="states" empty="unselect"></dropdown>
预览
我觉得这个问题有点太快了.对不起.但答案对其他人非常有用
使用
</dropdown>
validation_dropdown.js
稍微更改了指令,以便更好地理解,添加注释
/*** 基于* http://stackoverflow.com/questions/24692775/angularjs-setvalidity-causing-modelvalue-to-not-update*/app.module.directive('validDropDown', [功能 () {返回 {要求:'ngModel',链接:函数(范围、元素、属性、ngModel){//创建验证器ngModel.$validators.validDropDown = 函数 (modelValue, viewValue) {/* 当没有值存在时 */var isValid;if (!modelValue || modelValue.length === 0) {isValid = false;} 别的 {isValid = true;}/* 设置所需的验证器,因为这不是标准的 html 表单输入 */ngModel.$setValidity('required', isValid);/* 设置自定义验证器 */ngModel.$setValidity('validDropDown', isValid);/* 返回模型以便模型在视图中更新 */返回模型值;};//观察模型的变化scope.$watch(attr.ngModel, function () {/* 当模型之前被触摸 */如果(ngModel.$touched){/* 当模型不脏时,通过重新应用其内容将 ngModel 设置为脏 */如果 (!ngModel.$dirty) {ngModel.$setViewValue(ngModel.$modelValue);}}/* 当模型有值时 */如果(ngModel.$modelValue){/* 当之前没有接触过模型时 */如果(!ngModel.$touched){ngModel.$setTouched();}}返回 ngModel;});//创建时验证ngModel.$validate();}}}]);
I have created my own select dropdown using an unordered list and ng-repeat. The problem with this directive is that it does not work as a normal select/input/textarea where you can use required when using it in a html form.
So how do I implement the option required/ng-required (as directive) with validation on a custom directive?
Should I use an own implementation of the validation?
dropdown.html
<!-- displayed text on the select -->
<div class="title"
ng-class="{'placeholder': !hasSelected(), 'selected': isOpened}"
ng-mousedown="openSelect()">
{{getTitle()}}
<div class="icon" ng-class="{'active': isOpened}">
<i class="fa fa-caret-down"></i>
</div>
</div>
<!-- displayed options when opening the select dropdown -->
<div class="options">
<ul ng-show="isOpened">
<!-- First option is only shown when an empty option is required -->
<li ng-click="select(null)"
ng-show="hasEmptyOption() && isSelected()"
class="empty">
{{empty}}
</li>
<!-- Options of the select -->
<li ng-repeat="option in options track by $index"
ng-click="select($index)"
ng-class="{'active': isActive($index)}">
{{option}}
</li>
</ul>
</div>
dropdown.js
app.module.directive('dropdown', ['$document',
function ($document) {
'use strict';
return{
restrict: "E",
scope: {
model: "=",
empty: "@",
message: "@",
options: "="
},
templateUrl: 'app/common/directive/dropdown/dropdown.partial.html',
link: function (scope, elem, attrs) {
scope.message = "My message";
scope.isOpened = false;
scope.isSelected = function () {
return scope.model && scope.model !== null;
};
scope.hasEmptyOption = function () {
return scope.empty && scope.empty !== null;
};
scope.hasSelected = function () {
return (scope.selected);
};
scope.select = function (index) {
if (index !== null) {
scope.model = scope.options[index];
} else {
scope.model = null;
}
scope.closeSelect();
};
scope.closeSelect = function () {
scope.isOpened = false;
$document.unbind('click');
elem.unbind('click');
};
scope.openSelect = function () {
if (scope.isOpened) {
scope.closeSelect();
} else {
scope.isOpened = true;
$document.bind('click', function () {
scope.closeSelect();
scope.$apply();
});
elem.bind('click', function (e) {
e.stopPropagation();
});
}
};
scope.getTitle = function () {
if (scope.model && scope.model !== null) {
return scope.model;
} else if (scope.message) {
return scope.message;
} else {
return "Select";
}
};
}
};
}
]);
usage
<dropdown message="Select state" model="selectedState" options="states" empty="unselect"></dropdown>
Preview
I Think I was a bit to fast with the question. Sorry for that. But the answer is very usable for everybody else
usage
<dropdown message="Select state" model="selectedState" options="states" empty="unselect" valid-drop-down></dropdown>
validation_dropdown.js
[EDIT] changed directive a bit so it is better to understand, added comment
/**
* Based on
* http://stackoverflow.com/questions/24692775/angularjs-setvalidity-causing-modelvalue-to-not-update
*/
app.module.directive('validDropDown', [
function () {
return {
require: 'ngModel',
link: function (scope, elem, attr, ngModel) {
// Create validators
ngModel.$validators.validDropDown = function (modelValue, viewValue) {
/* When no value is present */
var isValid;
if (!modelValue || modelValue.length === 0) {
isValid = false;
} else {
isValid = true;
}
/* Set required validator as this is not a standard html form input */
ngModel.$setValidity('required', isValid);
/* Set custom validators */
ngModel.$setValidity('validDropDown', isValid);
/* Return the model so the model is updated in the view */
return modelValue;
};
// Watch for changes to the model
scope.$watch(attr.ngModel, function () {
/* When the model is touched before */
if (ngModel.$touched) {
/* When the model is not dirty, Set ngModel to dirty by re-applying its content */
if (!ngModel.$dirty) {
ngModel.$setViewValue(ngModel.$modelValue);
}
}
/* When the model has a value */
if (ngModel.$modelValue) {
/* When the model is not touched before */
if (!ngModel.$touched) {
ngModel.$setTouched();
}
}
return ngModel;
});
// Validate on creation
ngModel.$validate();
}
}
}
]);
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