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我不能得到这个查询返回不止一个运动对象,即使如果我在SQL中使用生成的查询返回的练习都如我所料过滤的多对多在Django
class Workout(models.Model):
created = models.DateTimeField(auto_now_add=True)
workout_type = models.ForeignKey(WorkoutType, on_delete=models.CASCADE)
exercises = models.ManyToManyField(Exercise, through=u'WorkoutExercise', related_name=u'workout_exercises')
class WorkoutExercise(models.Model):
exercise = models.ForeignKey(Exercise)
workout = models.ForeignKey(Workout)
class Exercise(models.Model):
name = models.CharField(max_length=255, unique=True)
而且该查询返回每个运动最新的锻炼
workouts = Workout.objects.latest('created')
exercises = Exercise.objects.filter(workout_exercises__exact=workouts)
如前所述,这只有当查询它产生应该和它在SQL返回2返回一个锻炼。
感谢您的快速回复和建议 – DevOps1