Django:另一个字段的每个值的最新记录

from django.db.models import Max

# 假设有一个名为Record的模型，其中包含字段value和timestamp
class Record(models.Model):
    value = models.IntegerField()
    timestamp = models.DateTimeField()

# 获取每个value字段的最新记录
latest_records = Record.objects.values('value').annotate(latest_timestamp=Max('timestamp'))

# 打印结果
for record in latest_records:
    print("Value: {}, Latest Timestamp: {}".format(record['value'], record['latest_timestamp']))