AngularJS:访问/打印相关集合的属性
我在Angular中定义了两个集合:AngularJS:访问/打印相关集合的属性,angularjs,Angularjs,我在Angular中定义了两个集合: app.controller('MainCtrl', function($scope, PieceService, TeamService) { PieceService.query(function(data){ $scope.pieces = data; }); TeamService.query(function(data){ $scope.teams = data; }); }); pieces是一个如下所示的集合:
app.controller('MainCtrl', function($scope, PieceService, TeamService) {
PieceService.query(function(data){
$scope.pieces = data;
});
TeamService.query(function(data){
$scope.teams = data;
});
});
pieces是一个如下所示的集合:[{name:'Petra',team_id:2},{name:'Jan',team_id:3}]
team是一个如下所示的集合:[{name:'TeamA',id:2},{name:'team',id:3}]
在模板中,我正在迭代片段集合:
<tr data-ng-repeat="piece in pieces">
如何打印每件作品的团队名称?
我曾尝试创建一个过滤器来实现这一点,但由于我不知道如何访问过滤器中的作用域,我目前运气不佳。不确定这是否是最性感的方式,但我会在控制器内创建一个函数来执行查找。我还决定将team_id缓存到名称查找中,但我意识到,对于2x2搜索来说,这并不是必需的
var app = angular.module('plunker', []);
app.controller('MainCtrl', function($scope) {
$scope.pieces = [{name:'Petra',team_id:2},{name:'Jan',team_id:3}];
$scope.teams = [{name:'TeamA',id:2},{name:'TeamB',id:3}];
var idcache = {};
$scope.getTeam = function(id) {
if(idcache[id]) {
return idcache[id];
}
//cache this
$scope.teams.forEach(function(team) {
idcache[team.id] = team.name;
});
return idcache[id];
}
});
我用示例代码创建了一个plunkr。
使用团队ID作为对象键,如下所示:
$scope.teamLookup = {}
// do this in the query callback
angular.forEach($scope.teams, function(val, key){
$scope.teamLookup[val.id] = val.name
});
<tr data-ng-repeat="piece in pieces">
<td>{{teamLookup[piece.team_id]}}</td>
<td>{{piece.name}}</td>
</tr>
然后,您的标记可以如下所示:
$scope.teamLookup = {}
// do this in the query callback
angular.forEach($scope.teams, function(val, key){
$scope.teamLookup[val.id] = val.name
});
<tr data-ng-repeat="piece in pieces">
<td>{{teamLookup[piece.team_id]}}</td>
<td>{{piece.name}}</td>
</tr>
{{teamLookup[piece.team_id]}
{{piece.name}
在控制器内创建一个函数,当给定团队ID时,该函数返回团队名称,并将其绑定到输出。