AngularJS:在指令中选择部分模板时使用ng-if

时间:2015-08-13 14:59:10

标签: javascript angularjs templates angularjs-directive compilation

我的指令需要在其模板中选择两个部分模板:

<div ng-if="enablerowselection" ui-grid="gridOptions" ui-grid-pagination ui-grid-selection class="grid"></div>

        <div ng-if="!enablerowselection" ui-grid="gridOptions" ui-grid-pagination class="grid"></div>

在我的指令的链接器函数中,我从属性中获取了enablerowselection的值:

function linker(scope, element, attrs) {
   scope.enablerowselection = attrs.enablerowselection; //enablerowselection is an attribute for my directive
}

但是,这会导致以下错误:

Error: [$compile:nonassign]

我想我需要在指令中编译部分模板,所以我将以下内容添加到链接器函数中,但它仍然不起作用:

$compile(element.contents())(scope);

编辑:以下是我的指令代码:

angular.module('myApp')
    .directive('myDirective', myDirective);

myDirective.$inject = ['$compile'];

function myDirective($compile) {
   return {
     restrict: 'EA',
     scope: {
        enablerowselection: '='
      },
     templateUrl: '/path/to/directive_tmpl.html',
     link: linkerFn

    };

 function linkerFn(scope, element, attrs) {
     $scope.enablerowselection = attrs.enablerowselection;
     $compile(element.contents())(scope); //does not help
  } //linkerFn
}

1 个答案:

答案 0 :(得分:1)

当我看到enablerowselection与隔离范围一样时,你应该在你的指令中使用make that属性作为可选项,这样如果没有提供,那么指令就不会抛出错误。您可以使用=?对该变量进行隔离的范围属性,如

scope: {
   enablerowselection: '=?'
},

如果您在指令中需要该值,则应将其作为属性添加到指令元素

<my-directive enablerowselection="enablerowselection"></my-directive>

基本上你应该在该属性中添加范围变量,当你使用=

时,它会被双向绑定

链接功能

function linkerFn(scope, element, attrs) {
     //scope.enablerowselection = attrs.enablerowselection; //reomve this
     //you already have value in `$scope.enablerowselection`,
     //you don't need to get it from attribute,
     //'=' in isolated scope means value of parent scope variable specified in attribute,
     //gets available inside the isolated scope(basically its two way binded.)
     $compile(element.contents())(scope); //does not help
}