1
我想知道他们将IntegerField中的列转换为外键的最佳步骤。这里是我的两个型号:将外键添加到Django模型
class workout(models.Model):
userid = models.IntegerField()
datesubmitted = models.DateField()
workoutdate = models.DateField();
bodyweight = models.FloatField(null=True);
totalreps = models.IntegerField()
totalweight = models.FloatField()
numsets = models.IntegerField();
numexercises = models.IntegerField()
workoutname = models.CharField(max_length=250)
,第二个:
class exercise(models.Model):
userid = models.IntegerField();
workoutid = models.IntegerField();
exercisename = models.CharField(max_length = 100)
repetitions = models.IntegerField()
weight = models.FloatField()
,最后我的Django视图代码:
user =User.objects.get(username = request.session['username']) #user
dates = request.GET.getlist('datepickerfilter') # two dates
workout_ids = workout.objects.filter(userid=user.id).filter(workoutdate__gte = dates[0]).filter(workoutdate__lte = dates[1])
all_exercises = exercise.objects.filter(workoutid__in = workout_ids)
我想更改的 'workoutid' 列锻炼模型到与锻炼模型中的id字段相关的外键。我想这改变改变模型领域:
workoutid = models.ForeignKey(workout);
,然后在我的视图中添加这个这个ORDER_BY声明all_exercises年底即
all_exercises = exercise.objects.filter(workoutid__in = workout_ids).order_by("workoutid__workoutdate")
我得到一个错误说:
(1054, "Unknown column 'tracking_exercise.workoutid_id' in 'field list'")
我认为这是我的模型代码中的一个问题,但我不确定这可能是视图问题。
感谢您的帮助!
我一定要改变我的两个表,并添加这些列? – 2012-07-25 01:27:55
您不必更改基础SQL表。你可以这样做:'userid = models.IntegerField()'到'user = models.ForeignKey(User,db_column ='userid')''。 – 2012-07-25 01:32:03
好吧,一切工作正常,除了这一件事,它不喜欢order_by(workout__workoutdate)。它说没有一个全球性的名字'workout__workoutdate'没有定义 – 2012-07-25 01:55:56