Python Django查询与最新
我有以下型号:Python Django查询与最新,python,django,Python,Django,我有以下型号: class Folder(models.Model): name = models.CharField() class Project(models.Model): name = models.CharField() folder = models.ForeignKey(Folder) class Percentage(models.Model): name = models.CharField() project = models.F
class Folder(models.Model):
name = models.CharField()
class Project(models.Model):
name = models.CharField()
folder = models.ForeignKey(Folder)
class Percentage(models.Model):
name = models.CharField()
project = models.ForeignKey(Project)
created = models.DateTimeField(auto_now_add=True)
created_by = models.ForeignKey(User)
仅使用
文件夹.id
如何获取附加到文件夹的每个项目的最新百分比,然后找到文件夹的平均百分比?如何获取百分比.objects.filter(project\u folder\u id=folder\u id).latest()
?这只会得到附加到文件的所有项目的最新百分比:(我想得到附加到文件的每个项目的最新百分比