Question

我想知道是否可以在模型上使用索引：

class Buildings(models.Model):
    island = models.ForeignKey(Island)
    townhall = models.IntegerField(default=1)
    lumberjack = models.IntegerField(default=0)
    stonequarry = models.IntegerField(default=0)
    ironmine = models.IntegerField(default=0)
    [...]

a=Buildings.objects.get(somecondition)
print a.townhall # 1
a[1] +=1
print a.townhall # 2

目前它抛出

“TypeError：'Buildings'对象是 unindexable“

我想做这样的事情的原因是使用索引会简化部分代码：

if queue.kind_id == 0: buildings.townhall += 1
elif queue.kind_id == 1: buildings.lumberjack += 1
elif queue.kind_id == 2: buildings.stonequarry += 1
elif queue.kind_id == 3: buildings.ironmine += 1
elif queue.kind_id == 4: buildings.factory += 1
elif queue.kind_id == 5: buildings.shipyard += 1
elif queue.kind_id == 6: buildings.university += 1

到此：

buildings[queue.kind_id] +=1

Answer 1

get()方法不返回查询集，只返回模型类的单个实例/对象。如果您想要检索多个对象（=查询集），请改用filter()！

a=Buildings.objects.filter(...)

我不确定您是在尝试使用伐木工人，市政厅等属性... 我想你可以做点什么：

buildings_list = ['townhall', 'lumberjack', ....]
attr = buildings_list[queue.kind_id]
setattr(buildings, attr, getattr(buildings, attr) + 1)

但我不确定你要做什么，如果你正在使用django的模型，他们打算使用它们......

Django查询集索引

1 个答案: