我怎么能传递包含[$指数]进入我的指令一些字符串？ [英] How can I pass some string containing [$index] into my directive?
问题描述
我想设置上是在指令调用中使用数据属性一些文本：
＆LT; TextArea类=PageDown键管理员wmd- preVIEW-23
数据模式=莫代尔
数据下页管理员
数据-NG-模式=answer.text
数据PID =answer.answerId
数据字段={{'modal.data.answers ['+ $指数+']的.text'}}
ID =模态数据回答 - {{$指数}}＆GT;＆LT; / textarea的＆GT;
它给语法错误，不管我怎么努力。没有人有任何想法可能是错误的？我想在一个字段名传递与来自AngularJS NG重复内的数组索引值
app.directive（'pagedownAdmin'，函数（$编译）{
变种nextId = 0;
VAR markdownConverter =新Markdown.Converter（）;
变种converter1 = Markdown.getSanitizingConverter（）; converter1.hooks.chain（preBlockGamut功能（文字，RBG）{
返回text.replace（/ ^ {0,3}* \\ N（（？：？* \\ N）+）{0,3}* $ /克，功能（全，内） {
返回＆LT;＆BLOCKQUOTE GT; + RBG（内）+＆LT; / BLOCKQUOTE＆GT; \\ N的;
}）;
}）; 返回{
要求：'ngModel'，
更换：真实，
范围： {
现场：'=场'，
模态：'=模态'，
PID：'= PID
}，
模板：'＆LT; DIV CLASS =PageDown键，引导编辑器＆GT;＆LT; / DIV＆GT;，
链接：功能（范围，元素，ATTRS，ngModel）{
后来在我的指导我有：
$范围的eval（attrs.field +=+ rawContent）。
。范围$适用（）;
然而，它似乎并没有得到做$ EVAL它给人的错误之前的点。
这里的语法错误：
错误：[$解析：语法] http://errors.angularjs.org/1.2.3/$parse/syntax?p0='modal.data.answers%5B'&…7D%7D&p4='modal.data.answers%5B'%20%2B%20%24index%20%2B%20'%5D.text'%7D%7D
在错误（小于匿名＆GT;）
在http://127.0.0.1:81/Scripts/angular-v1.2.3/angular.min.js:6:449
下面是一个例如
你应该把它写像这样：
＆LT; textarea的数据字段={{modal.data.answers [$指数]的.text}}＆GT;
但你也应该使用文字绑定语法（ @ ），而不是在双向绑定语法 （ = ）参考父范围的领域时：
范围：{
现场：'@'，
}，
在短，@语法支持插值而=语法不！
您一定要阅读：<一href=\"http://stackoverflow.com/questions/14050195/what-is-the-difference-between-and-in-directive-scope\">What在指令范围内的'@'和'='区别
我总是喜欢在可能的时候显示源$ C $ C：
在 compile.js 有一个 nodeLinkFn 函数，在里面你可以看到这些情况：
情况下，@：
ATTRS。$观察（attrName，功能（价值）{
isolateScope [scopeName] =价值;
}）;
。ATTRS $$观察家[attrName] $$范围=范围;
如果（ATTRS [attrName]）{
//如果属性已经提供那么我们触发插值保证
//值是那里的链接使用FN
isolateScope [scopeName] = $插补（ATTRS [attrName]）（范围）;
}
打破;情况下=： // ......一些code在这里 isolateScope。$腕表（功能parentValueWatch（）{ // ......一些code在这里 }，空，parentGet.literal）;
打破;
摘要：
- 当使用
'@'语法角度使用 $观察（内部使用的 $插值和 $看） - 当使用
=语法角度使用 $手表，它不支持插值。 - Difference观察员和看守之间
I am trying to set some text on a data attribute that is used in a directive call:
<textarea class="pagedown-admin wmd-preview-23"
data-modal="modal"
data-pagedown-admin
data-ng-model="answer.text"
data-pid="answer.answerId"
data-field="{{'modal.data.answers[' + $index + '].text'}}"
id="modal-data-answer-{{$index}}"></textarea>
It's giving syntax errors no matter what I try. Does anyone have any idea what could be wrong? I want to pass in a field name with an array index value from inside an AngularJS ng-repeat.
app.directive('pagedownAdmin', function ($compile) {
var nextId = 0;
var markdownConverter = new Markdown.Converter();
var converter1 = Markdown.getSanitizingConverter();
converter1.hooks.chain("preBlockGamut", function (text, rbg) {
return text.replace(/^ {0,3}""" *\n((?:.*?\n)+?) {0,3}""" *$/gm, function (whole, inner) {
return "<blockquote>" + rbg(inner) + "</blockquote>\n";
});
});
return {
require: 'ngModel',
replace: true,
scope: {
field: '=field',
modal: '=modal',
pid: '=pid'
},
template: '<div class="pagedown-bootstrap-editor"></div>',
link: function (scope, element, attrs, ngModel) {
Later in my directive I have:
scope.$eval(attrs.field + "=" + rawContent);
scope.$apply();
However it does not appear to get to the point of doing the $eval before it gives the error.
Here's the syntax error:
Error: [$parse:syntax] http://errors.angularjs.org/1.2.3/$parse/syntax?p0='modal.data.answers%5B'&…7D%7D&p4='modal.data.answers%5B'%20%2B%20%24index%20%2B%20'%5D.text'%7D%7D
at Error (<anonymous>)
at http://127.0.0.1:81/Scripts/angular-v1.2.3/angular.min.js:6:449
Here is an example
You should write it like so:
<textarea data-field="{{modal.data.answers[$index].text}}" >
But you should also use the Text Binding syntax (@) rather than the Two-way Binding syntax (=) when referring to field of parent scope:
scope: {
field: '@',
},
In short, "@" syntax supports interpolation while "=" syntax doesn't!
You should definitely read this: What is the difference between '@' and '=' in directive scope
I always like to show the source code when possible:
In compile.js there is a nodeLinkFn function, Inside you can see these cases:
case '@':
attrs.$observe(attrName, function(value) {
isolateScope[scopeName] = value;
});
attrs.$$observers[attrName].$$scope = scope;
if( attrs[attrName] ) {
// If the attribute has been provided then we trigger an interpolation to ensure
// the value is there for use in the link fn
isolateScope[scopeName] = $interpolate(attrs[attrName])(scope);
}
break;
case '=':
// ....... some code here
isolateScope.$watch(function parentValueWatch() {
//...... some code here
}, null, parentGet.literal);
break;
Summary :
- when using
'@'syntax angular uses $observe (which internally uses $interpolate and $watch) - when using
'='syntax angular uses $watch, which does not support interpolations. - Difference Between Observers and Watchers
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