我有两个模型:
class Order(models.Model):
truck = models.ForeignKey(Truck, on_delete=models.CASCADE, related_name='relation_truck',default=None)
date= models.DateField()
product=models.CharField(max_length=30)
depot = models.CharField(max_length=10)
volume = models.CharField(max_length=30, blank=True)
volume_delivered = models.CharField(max_length=30, blank=True)
order_status = models.CharField(max_length=50, blank=True)
pub_date = models.DateTimeField(auto_now_add=True, blank=True)
和另一个模型:
class LoadingDashboard(models.Model):
order = models.ForeignKey(Order, on_delete=models.CASCADE, related_name='relation_loading',default=None,blank=True)
product = models.CharField(max_length=3)
loading_average = models.IntegerField(null=True)
expect_quantity = models.IntegerField()
loaded_quantity = models.IntegerField()
remaining_quantity = models.IntegerField(null=True)
total_trucks = models.IntegerField(null=True)
loaded_trucks=models.IntegerField()
remaining_trucks = models.IntegerField(null=True)
我想做一些数学运算,如下所示:
模型加载中的产品只有两种:PMS和AGO
模型订单中的产品也是PMS和Ago
在模型订单中装有PMS的卡车的特定体积为35000,交付的volume_volume应该比35000短一些,例如34294
装有AGO的卡车的特定体积为33000,交付的体积可以是例如32294
我希望模型加载中的field loading_average为使用指定产品交付的field volume_deliver的平均值,无论是AGO还是PMS,因为它们具有不同的volume_delivered值除以1000
给出了Model Loaded中的Expect_quantity的含义,我将决定该值
模型已加载中的loaded_quantity应该是模型订单中已交付的所有volume_delivered的总和,而且PMS和AGO再次交付了不同的volume_delivered,因此,如果产品是PMS,并且产品与PGO相同,则它应该仅对模型中的PMS执行volume_delivered的总和
剩余数量应为Expected_quantity和loaded_quantity之差
total_trucks应该是Expect_quantity和loading_average的除法
loaded_trucks应该是Order模型中卡车的总和,并且同样应该有带有PMS的卡车和带有AGO的卡车。因此,如果产品是模型中的PMS,则已装载的卡车应为仅具有模型订单中产品PMS的卡车的总和减去产品PMS的total_trucks
剩余卡车是已装载卡车与卡车总数之差。
到目前为止,我管理的是:
def loading_dashboard(request):
# import pdb; pdb.set_trace()
loaded = LoadingDashboard.objects.all()
for math in loaded.iterator():
if math.product == 'PMS':
volume = list(Order.objects.filter(product='PMS')
.values_list('volume_delivered', flat=True))
order = volume
sum = 0
for volume in order:
sum = sum + int(volume)
return sum
total = sum
trucks = Order.objects.filter(product='PMS').count()
loading = Order.objects.filter(product='PMS', order_status='Loaded').count()
math.loading_average = total / trucks / 1000
math.total_trucks = math.expect_quantity / math.loading_average
math.loaded_quantity = total / 1000
math.remaining_quantity = math.expect_quantity - math.loaded_quantity
math.loaded_trucks = loading
math.remaining_trucks = math.total_trucks - math.loaded_trucks
return render(request, 'loadings_dashboard.html' , {'loaded': loaded})
我遇到错误
AttributeError:'int'对象没有属性'get'。
最佳答案
经过三天的研究,我解决了这个问题:
def loading_dashboard(request):
# import pdb; pdb.set_trace()
loaded = LoadingDashboard.objects.all()
for math in loaded:
volume = list(Order.objects.filter(product='PMS')
.values_list('volume_delivered', flat=True))
order = volume
sum = 0
for volume in order:
sum = sum + int(volume)
trucks = Order.objects.filter(product='PMS').count()
loading = Order.objects.filter(product='PMS', order_status='Loaded').count()
volume_ago = list(Order.objects.filter(product='AGO')
.values_list('volume_delivered', flat=True))
order_ago = volume_ago
sum_ago = 0
for volume in order_ago:
sum_ago = sum_ago + int(volume)
trucks_ago = Order.objects.filter(product='AGO').count()
loading_ago = Order.objects.filter(product='AGO', order_status='Loaded').count()
if math.product == 'PMS':
math.loading_average = sum // trucks // 1000
math.total_trucks = math.expect_quantity // math.loading_average
math.loaded_quantity = sum // 1000
math.remaining_quantity = math.expect_quantity - math.loaded_quantity
math.loaded_trucks = loading
math.remaining_trucks = math.total_trucks - math.loaded_trucks
elif math.product == 'AGO':
math.loading_average = sum_ago // trucks_ago // 1000
math.total_trucks = math.expect_quantity // math.loading_average
math.loaded_quantity = sum_ago // 1000
math.remaining_quantity = math.expect_quantity - math.loaded_quantity
math.loaded_trucks = loading_ago
math.remaining_trucks = math.total_trucks - math.loaded_trucks
return render(request, 'loadings_dashboard.html' , {'loaded': loaded})
关于python - 如果我有两个模型,即模型A和模型B,并且我希望模型A的字段的平均值为模型B中的字段的值,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/54970523/