142 lines
4.4 KiB
Python
142 lines
4.4 KiB
Python
import uuid
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from django.db import models
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from django.db.models import Avg
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from django_extensions.db.models import TimeStampedModel
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from django.core.exceptions import ValidationError
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from django.utils import timezone
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from django.db.models.signals import post_save
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from django.dispatch import receiver # 导入receiver
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from account.models import RoleChoices, User
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from task.models import Task
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from prompt.models import Conversation
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class FlagChoices(models.TextChoices):
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RED = "red", "值得展示"
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BLUE = "blue", "需要讲解"
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GREEN = "green", "优秀作品"
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YELLOW = "yellow", "需要改进"
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class Submission(TimeStampedModel):
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id = models.UUIDField(
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primary_key=True,
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default=uuid.uuid4,
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editable=False,
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)
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user = models.ForeignKey(
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User,
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on_delete=models.CASCADE,
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related_name="my_submissions",
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)
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task = models.ForeignKey(Task, on_delete=models.CASCADE)
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score = models.FloatField(default=0.0, verbose_name="分数")
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html = models.TextField(null=True, blank=True, verbose_name="HTML代码")
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css = models.TextField(null=True, blank=True, verbose_name="CSS代码")
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js = models.TextField(null=True, blank=True, verbose_name="JS代码")
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conversation = models.ForeignKey(
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Conversation, on_delete=models.SET_NULL, null=True, blank=True,
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related_name="submissions", verbose_name="对话"
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)
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flag = models.CharField(
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max_length=10,
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choices=FlagChoices.choices,
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null=True,
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blank=True,
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default=None,
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db_index=True,
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verbose_name="标记",
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)
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raw_score = models.FloatField(default=0.0, verbose_name="原始加权分")
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nominated = models.BooleanField(default=False, db_index=True, verbose_name="参与排名")
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class Meta:
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ordering = ("-created",)
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def __str__(self):
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return f"{self.user.username} - {self.task.title}"
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def get_task_type(self):
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"""
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返回任务的具体类型（Challenge 或 Tutorial）
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"""
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return self.task.task_type
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def update_score(self):
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ratings = list(self.ratings.select_related("user").all())
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n = len(ratings)
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if n == 0:
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self.raw_score = 0.0
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self.score = 0.0
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self.save(update_fields=["raw_score", "score"])
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return
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weighted_sum = sum(
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r.score * (0.5 if r.user.role == RoleChoices.SUPER
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else 0.3 if r.user.role == RoleChoices.ADMIN
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else 0.2)
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for r in ratings
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)
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self.raw_score = weighted_sum / n
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C = 3
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global_mean = (
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Submission.objects.filter(raw_score__gt=0)
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.exclude(pk=self.pk)
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.aggregate(Avg("raw_score"))["raw_score__avg"]
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) or self.raw_score
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self.score = (C * global_mean + n * self.raw_score) / (C + n)
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self.save(update_fields=["raw_score", "score"])
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def save(self, *args, **kwargs):
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super().save(*args, **kwargs)
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class Rating(models.Model):
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user = models.ForeignKey(
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User,
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on_delete=models.CASCADE,
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related_name="ratings",
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)
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submission = models.ForeignKey(
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Submission,
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on_delete=models.CASCADE,
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related_name="ratings",
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)
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score = models.IntegerField(default=0, verbose_name="分数")
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created = models.DateTimeField(auto_now_add=True)
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class Meta:
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unique_together = ("user", "submission")
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def __str__(self):
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return f"{self.user.username} 评分了 {self.submission.id}，分数是 {self.score}"
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def clean(self):
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"""
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在保存之前检查用户当天的评分次数
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"""
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today_start = timezone.now().replace(hour=0, minute=0, second=0, microsecond=0)
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today_end = today_start + timezone.timedelta(days=1)
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count = Rating.objects.filter(
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user=self.user, created__range=(today_start, today_end)
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).count()
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if self.user.role == RoleChoices.NORMAL and count >= 30:
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raise ValidationError("普通用户每天最多只能评分30次。")
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def save(self, *args, **kwargs):
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self.clean()
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super().save(*args, **kwargs)
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@receiver(post_save, sender=Rating)
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def update_submission_score_on_save(sender, instance, **kwargs):
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"""
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当Rating保存时，更新对应的Submission的平均分
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"""
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instance.submission.update_score()
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