我已经在 Angular 的隔离范围中苦苦挣扎了超过 24 小时。这是我的场景:我对一个ng-repeat
对象数组进行了迭代,我想从中使用自定义指令来生成一个<select>
或<input>
基于field_type
当前被迭代对象的属性。这意味着我必须$compile
在指令的链接后函数中生成模板,因为我无法访问模板函数中的迭代对象。
除了将生成的模板实际绑定到我的外部范围内的控制器 (vm) 之外,一切都按预期工作。我认为我的方法(在模板字符串中添加这个:)ng-model="vm.prodAttribs.' + attr.attribute_code +'"
可能是错误的,并且希望得到正确方向的指针。谢谢!
请参阅下面的示例代码:
指令:
directives.directive('productAttributeWrapper', ['$compile', function($compile){
//this directive exists solely to provide 'productAttribute' directive access to the parent scope
return {
restrict: 'A',
scope: false,
controller: function($scope, $element, $attrs){
this.compile = function (element) {
$compile(element)($scope);
console.log('$scope.prodAttribs in directive: ', $scope.prodAttribs);
};
}
}
}]);
directives.directive('productAttribute', ['$compile', function($compile){
return {
restrict: 'A',
require: '^productAttributeWrapper', //use the wrapper's controller
scope: {
attribModel: '=',
prodAttribute: '=productAttribute', //binding to the model being iterated by ng-repeat
},
link: function(scope, element, attrs, ctrl){
var template = '';
var attr = scope.prodAttribute;
if(!attr) return;
switch(attr.attribute_field_type.toLowerCase()){
case 'textfield':
template =
'<input type="text" id="'+attr.attribute_code+'" ng-model="vm.prodAttribs.' + attr.attribute_code +'">';
break;
case 'dropdown':
template = [
'<select class="cvl" id="'+attr.attribute_code+'" ng-model="vm.prodAttribs.' + attr.attribute_code +'">',
'#cvl_option_values',
'\n</select>'
].join('');
var options = '\n<option value="">Select One</option>';
for(var i=0; i<attr.cvl_option_values.length; i++) {
var optionVal = attr.cvl_option_values[i].value;
options += '\n<option value="'+optionVal+'">' + attr.cvl_option_values[i].value + '</option>';
}
template = template.replace('#cvl_option_values', options);
break;
}
element.html(template);
ctrl.compile(element.html()); //try to bind template to outer scope
}
}
}]);
html:
<div ng-controller="ProductController as vm">
<div product-attribute="attrib" ng-repeat="attrib in vm.all_attribs"></div>
</div>
控制器:
app.controller('ProductDetailsController', function(){
var vm = this;
//also added the property to $scope to see if i could access it there
$scope.prodAttribs = vm.prodAttribs = {
name: '',
description: '',
price: [0.0],
condition: null
}
vm.all_attributes = [
{
"attribute_id": 1210,
"attribute_display_name": "Product Type",
"attribute_code": "product_type",
"attribute_field_type": "Textfield",
"cvl_option_values": [],
"validation_rules": {}
},
{
"attribute_id": 902,
"attribute_display_name": "VAT",
"attribute_code": "vat",
"attribute_field_type": "dropdown",
"cvl_option_values": [
{
"option_id": "5",
"value": "5%"
},
{
"option_id": "6",
"value": "Exempt"
}
],
"validation_rules": {}
}];
})