我有一个 DateTime ,我想将其向下舍入到15秒(或另一个间隔)。
例如 “ 2020-03-16 12:23: 53.756 ” 至 “ 2020-03-16 12:23: 45.000 ”
和 “ 2020-03-16 12:24: 01.1234 ” 至 “ 2020-03-16 12:24: 00.000 ”
答案 0 :(得分:6)
您可以在Dart和Flutter中使用DateTime扩展名进行此操作:
@login_required
def eadmin(request):
transactions = Product.objects
return render(request, 'accounts/index.html', {'transactions': transactions})
用法:
class Product(models.Model):
details = models.CharField(max_length=1000)
opname = models.CharField(max_length=100)
pub_date = models.DateTimeField()
amount = models.IntegerField()
contactemail = models.TextField()
purpose = models.TextField()
poster = models.ForeignKey(User, on_delete=models.CASCADE)
transactionid = models.CharField(max_length=6)
def __str__(self):
return self.transactionid
输出:“ 2020-03-16 12:23:45.000”
或
<table class="table">
<thead>
<tr>
<th scope="col">#</th>
<th scope="col">XXXXX</th>
<th scope="col">Amount €</th>
<th scope="col">Transaction ID</th>
</tr>
</thead>
{% for transaction in transactions.all %}
<tbody>
<tr>
<th scope="row">-</th>
<td>{{ transaction.opname }}</td>
<td>{{ transaction.amount }}</td>
<td>{{ transaction.transactionid }}</td>
</tr>
</tbody>
{% endfor %}
</table>
输出:“ 2020-03-16 12:00:00.000”
答案 1 :(得分:0)
以上回答的补充(请记住,为扩展名提供一个名称,并提防使用 this。)。
extension DateTimeExtension on DateTime {
DateTime roundDown({Duration delta = const Duration(days: 1)}) {
return DateTime.fromMillisecondsSinceEpoch(
millisecondsSinceEpoch - millisecondsSinceEpoch % delta.inMilliseconds);
}
}