我正在尝试groupBy
一个JS日期对象的日期。我想每天对数据进行分组。
我有什么想法可以在视图中做到这一点吗?
$scope.data = {
messages: [
{
date: new Date(1432811030 * 1000),
message: 'Some text 01'
},
{
date: new Date(1432731600 * 1000),
message: 'Some text 02'
},
{
date: new Date(1432819703 * 1000),
message: 'Some text 03'
}
]
};
在我看来,我使用:
<div ng-repeat="(key, value) in data.messages | groupBy: 'date'">
<div>{{ key }}</div>
<div ng-repeat="message in value">
<div>{{ message.message }}</div>
</div>
</div>
我在mu项目中包含了这个angular.filter
模块:https://github.com/a8m/angular-filter
问题是我现在按日期/时间而不是每天进行分组。知道怎么样?
答案 0 :(得分:6)
DEMO:http://plnkr.co/edit/djPMu4UH9t9BeGwBcUMI
屏幕截图:https://www.dropbox.com/s/9z5t6nsp3x1266s/Screenshot%202015-05-28%2019.50.44.png?dl=0
<强> HTML 强>:
<body ng-app="myApp" ng-controller="myController">
<div ng-repeat="(key, value) in testData.messages">
<div>{{ key }}</div>
<div ng-repeat="message in value">
<div>{{ message }}</div>
</div>
</div>
</body>
<强> JS 强>:
var app = angular.module('myApp', []);
app.controller('myController', function($scope) {
$scope.data = {
messages: [
{
date: new Date(1432811030 * 1000),
message: 'Some text 01'
},
{
date: new Date(1432731600 * 1000),
message: 'Some text 02'
},
{
date: new Date(1432819703 * 1000),
message: 'Some text 03'
}
]
};
$scope.convertTo = function (arr, key, dayWise) {
var groups = {};
for (var i=0;l= arr.length, i<l;i++) {
if (dayWise) {
arr[i][key] = arr[i][key].toLocaleDateString();
}
else {
arr[i][key] = arr[i][key].toTimeString();
}
groups[arr[i][key]] = groups[arr[i][key]] || [];
groups[arr[i][key]].push(arr[i]);
}
return groups;
};
$scope.testData = {};
angular.copy($scope.data, $scope.testData);
$scope.testData.messages = $scope.convertTo($scope.testData.messages, 'date', true);
console.log($scope.testData)
});
答案 1 :(得分:3)
这里有两种方法。一种是使用group by。另一个我想要的是按天预先分组我的数据,并且有一个“哑”视图,它不进行分组,而是分组在服务中预先完成或者至少在控制器。 我会添加一个plunkr来演示。
http://plnkr.co/edit/z1Y4147sCw2cCAfunHwg?p=preview
如果你有这样的数据:
vm.data = [
{day: new Date(1432811030000), msg: 'someText'},
{day: new Date(1432811030000), msg: 'someText2'},
{day: new Date(1432811030000), msg: 'someText3'},
{day: new Date(1432731600000), msg: 'someTextDay2'},
{day: new Date(1432731600000), msg: 'someTextDay2-1'},
{day: new Date(1432731600000), msg: 'someTextDay2-2'},
{day: new Date(1432819703000), msg: 'someTextDay3'},
{day: new Date(1432819703000), msg: 'someTextDay3'}
];
以下是相关代码:
<ul data-ng-repeat="(key, val) in vm.data | groupBy: 'day'">
Day: {{key}}
<li data-ng-repeat="msg in val">
{{msg.msg}}
</li>
</ul>
而且,另一方面,如果您要对数据进行预分组,则视图中的相关代码将如下所示:
<ul data-ng-repeat="(key, val) in vm.groupedData">
Day: {{key}}
<li data-ng-repeat="msg in val">
{{msg.msg}}
</li>
</ul>
以下是每天对它们进行分组的js代码:
var groupByDate = function groupByDate(messages){
var grouped = {};
_.forEach(messages, function(msg){
var actualDay = new Date(msg.day - (msg.day % 86400000));
if ( !grouped[actualDay] ){
grouped[actualDay] = [];
}
grouped[actualDay].push(msg);
});
return grouped;
};