隔离范围变量未定义 [英] Isolate scope variable is undefined

问题描述

由于某种原因，我无法在链接函数中访问隔离范围变量index".我已经尝试了 @ 和 = 以查看它是否有任何区别，但这没有效果，我还尝试使用索引以外的词(以防它已经在使用 angular 或其他东西)具有相同的结果.错误消息:ReferenceError:索引未定义.

指令:

var jobernizeDirectives = angular.module('jobernizeDirectives', []);jobernizeDirectives.directive('viewLargeContent', function() {返回 {范围: {索引:'=索引'},要求:'ngModel'，链接:函数(范围、el、attrs、ngModel){控制台日志(索引)；函数 openEditor() {控制台日志(索引)；var main_container = angular.element('.main_container');var view_frame = angular.element('.view-frame');控制台日志(ngModel)；main_container.append('<div class="dimmer"></div>');main_container.append('
'+ '<文本区域>'+ ngModel.$viewValue + '</textarea>'+ '<按钮>提交更改'+ '</div>');var dimmer = angular.element('.dimmer');var content_container = angular.element('.large-content' + index);//content_container.css({ marginTop: (content_container.height()/-2), width: view_frame.width(), marginLeft: (view_frame.width()/-2) })content_container.css({ height: (0.8*main_container.height()), width: view_frame.width(), marginLeft: (view_frame.width()/-2) })content_container.find('button').on('click', function() {var new_content = content_container.find('textarea').get(0).value;ngModel.$setViewValue(new_content);content_container.hide();dimmer.hide();});}//el.on('click', openEditor);el.on('点击', 打开编辑器);}}});

html:

<div class="row"><div class="small-12 列"><h2>你的简历</h2>

<div class="row"><div class="small-12 列"><表格><头><tr><th>姓名</th><th>类别</th>添加日期</th><th>查看/编辑简历</th></tr></thead><tr data-ng-repeat="简历中的简历"><td>{{ resume.name }}</td><td>{{ resume.category }}</td><td>{{ resume.date_ added }}</td><td><button index="le" view-large-content data-ng-model="resume.content">查看简历</button></td></tr></tbody><表格>

解决方案

Index 是作用域对象的一个​​属性，因此您可以像这样访问它:

scope.index

'@' 或 '=' 都可以工作，区别在于 '@' 将插入值并在它更改时更新隔离范围，而 '=' 意味着 Angular 应该保持属性和隔离范围同步.如果变量具有相同的名称，则可以使用语法糖

范围:{指数: '@'},

这是带有您的代码的 JSBin.

For some reason I am not able to access my isolate scope variable "index" in my link function. I have tried both @ and = to see if it made any difference and this had no effect, I also tried using a word other than index (in case it was already in use by angular or something) with the same result. Error msg: ReferenceError: index is not defined.

directive:

var jobernizeDirectives = angular.module('jobernizeDirectives', []);

jobernizeDirectives.directive('viewLargeContent', function() {
    return {
        scope: {
            index: '=index' 
        },
        require: 'ngModel',
        link: function (scope, el, attrs, ngModel) {

            console.log(index);

            function openEditor() {
                console.log(index);

                var main_container = angular.element('.main_container');
                var view_frame = angular.element('.view-frame');

                console.log(ngModel);

                main_container.append('<div class="dimmer"></div>');
                main_container.append(

                        '<div class="large-content' + index + '">'
                    +   '<textarea>' + ngModel.$viewValue + '</textarea>' 
                    +   '<button>Submit Changes</button>'
                    +   '</div>'

                );  

                var dimmer = angular.element('.dimmer');
                var content_container = angular.element('.large-content' + index);      

                // content_container.css({ marginTop: (content_container.height()/-2), width: view_frame.width(), marginLeft: (view_frame.width()/-2) })
                content_container.css({ height: (0.8*main_container.height()), width: view_frame.width(), marginLeft: (view_frame.width()/-2)  })

                content_container.find('button').on('click', function() {
                    var new_content = content_container.find('textarea').get(0).value;

                    ngModel.$setViewValue(new_content);

                    content_container.hide();
                    dimmer.hide();
                });
            }

            // el.on('click', openEditor);
            el.on('click', openEditor);

        }
    }
});

html:

<div data-ng-controller="resumesController">

    <div class="row">
        <div class="small-12 columns">
            <h2>Your Resumes</h2>
        </div>
    </div>

    <div class="row">
        <div class="small-12 columns">
            <table>
                <thead>
                    <tr>
                        <th>Name</th>
                        <th>Category</th>
                        <th>Date Added</th>
                        <th>View/Edit Resume</th>
                    </tr>
                </thead>
                <tbody>
                    <tr data-ng-repeat="resume in resumes">
                        <td>{{ resume.name }}</td>
                        <td>{{ resume.category }}</td>
                        <td>{{ resume.date_added }}</td>
                        <td><button index="le" view-large-content data-ng-model="resume.content">View Resume</button></td>
                    </tr>
                </tbody>
            <table>
        </div>
    </div>

</div>

解决方案

Index is an attribute of you scope object, so you access it like this:

scope.index

Both '@' or '=' will work, the difference is that '@' will interpolate the value and update the isolated scope when it changes and '=' means Angular should keep the attribute and the isolated scope in sync. If the variables have the same name you can use the syntactic sugar

scope: {
  index: '@' 
},

Here is a JSBin with your code.

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