Angularjs Angular.js-按嵌套属性筛选对象
我在寻求建议。我的以下代码不起作用,很可能是因为指令或筛选器在Angularjs Angular.js-按嵌套属性筛选对象,angularjs,angularjs-directive,angularjs-filter,Angularjs,Angularjs Directive,Angularjs Filter,我在寻求建议。我的以下代码不起作用,很可能是因为指令或筛选器在$scope.clients对象更改时未得到更新: $scope.clients = { "IDa": {"position": {index: 1}, "name": "a"}, "IDb": {"position": {index: 2}, "name": "b"}, "IDc": {"position": {index: 3}, "name": 'c'}, "IDd": {"position":
$scope.clients
对象更改时未得到更新:
$scope.clients = {
"IDa": {"position": {index: 1}, "name": "a"},
"IDb": {"position": {index: 2}, "name": "b"},
"IDc": {"position": {index: 3}, "name": 'c'},
"IDd": {"position": {index: 4}, "name": "d"},
"IDe": {"position": {index: 5}, "name": "e"},
"IDf": {"position": {index: 6}, "name": "f"},
"IDg": {"position": {index: 7}, "name": "g"},
"IDh": {"position": {index: 8}, "name": "h"},
"IDi": {"position": {index: 9}, "name": "i"}
};
我需要根据position属性显示7个项目(div)。棘手的是,如果对象中的项少于7项,视图必须仍然有7项,而不是名称属性,它将显示“等待客户端”。视图必须按位置1..7的顺序显示这7个项目
HTML:
<div class="streams__unit" stream client="clients | position:1">
{{ client.name || 'Waiting for client' }}
</div>
<div class="streams__unit" stream client="clients | position:2">
{{ client.name || 'Waiting for client' }}
</div>
<div class="streams__unit" stream client="clients | position:3">
{{ client.name || 'Waiting for client' }}
</div>
<div class="streams__unit" stream client="clients | position:4">
{{ client.name || 'Waiting for client' }}
</div>
<div class="streams__unit" stream client="clients | position:5">
{{ client.name || 'Waiting for client' }}
</div>
<div class="streams__unit" stream client="clients | position:6">
{{ client.name || 'Waiting for client' }}
</div>
<div class="streams__unit" stream client="clients | position:7">
{{ client.name || 'Waiting for client' }}
</div>
但是它不起作用,因为客户端对象更新的时间比过滤器触发的时间晚(我想)。以下是指令:
angular.module('app').directive('stream', function () {
return {
restrict: 'EA',
controller: function($scope) {
$scope.$watch('client', function(val) {
console.log('watch worked', val);
});
},
scope: {},
link: function (scope, element, attrs, fn) {
scope.$watch(attrs.client, function(client) {
scope.client = client;
});
}
};
});
一种方法是两步方法:
{{item.name | |'等待客户端'}
JavaScript:
angular.module('app', []).controller('ExampleCtrl', function($scope) {
$scope.clients = {
"IDa": {"position": {index: 1}, "name": "a"},
"IDb": {"position": {index: 2}, "name": "b"},
"IDc": {"position": {index: 3}, "name": 'c'},
"IDd": {"position": {index: 4}, "name": "d"},
"IDe": {"position": {index: 5}, "name": "e"}
};
$scope.clientsArr = [];
for(var i in $scope.clients) {
$scope.clientsArr.push({
id: i,
position: $scope.clients[i].position,
name: $scope.clients[i].name
});
}
while($scope.clientsArr.length < 7) {
$scope.clientsArr.push({});
}
});
angular.module('app',[]).controller('ExampleCtrl',function($scope){
$scope.clients={
“IDa”:{“位置”:{索引:1},“名称”:“a”},
“IDb”:{“位置”:{索引:2},“名称”:“b”},
“IDc”:{“位置”:{索引:3},“名称”:“c”},
“IDd”:{“位置”:{索引:4},“名称”:“d”},
“IDe”:{“position”:{index:5},“name”:“e”}
};
$scope.clientsArr=[];
用于(风险值i,单位为$scope.clients){
$scope.clientsArr.push({
id:我,
职位:$scope.clients[i]。职位,
名称:$scope.clients[i].name
});
}
而($scope.clientsArr.length<7){
$scope.clientsArr.push({});
}
});
您能否更清楚地了解一下您想要实现的目标?也许是一个有效的例子?另外,使用ng repeat、Limito筛选器和orderBy筛选器是否可以实现这一点?我担心ng repeat不起作用,因为视图必须有7项。而且它的对象可能有0个或少于7个项。我还需要注意客户端对象上的更改,因为有些项可以切换位置(position.index更改)、动态显示、取消缩放、更改属性值等等。也可以假设我有索引为1、2、4的项。我仍然需要在位置3有一个空项目。这段代码在这种情况下不起作用,因为它没有将元素放在正确的位置。
<div ng-repeat="item in clientsArr | orderBy: 'position.index' | limitTo: 7" class="streams__unit">
{{ item.name || 'Waiting for client' }}
</div>
angular.module('app', []).controller('ExampleCtrl', function($scope) {
$scope.clients = {
"IDa": {"position": {index: 1}, "name": "a"},
"IDb": {"position": {index: 2}, "name": "b"},
"IDc": {"position": {index: 3}, "name": 'c'},
"IDd": {"position": {index: 4}, "name": "d"},
"IDe": {"position": {index: 5}, "name": "e"}
};
$scope.clientsArr = [];
for(var i in $scope.clients) {
$scope.clientsArr.push({
id: i,
position: $scope.clients[i].position,
name: $scope.clients[i].name
});
}
while($scope.clientsArr.length < 7) {
$scope.clientsArr.push({});
}
});