我是Django的新成員,並且遇到MultipleChoiceField的POST請求時間過長的問題。它有人名單,我想顯示地址列表,這些人住在那裏的時間與他們住在一起,但我的解決方案太慢了。因此,如果我選擇3 +人加載時間變得非常大(4-5秒),但數據庫查詢只需要0.5-0.7秒(如Django的調試工具欄說),這就是爲什麼我沒有創建任何索引尚未(我會創建它們)。我認爲長頁面加載的問題是關於我錯誤的觀點工作。同樣在django-debug-toolbar的'Timer'面板中,大部分時間都需要「Request」部分。Django處理MultipleChoiceField數據需要很長時間
簡化我的models.py的版本:
class Person(models.Model):
name = models.CharField(max_length=300)
class House(models.Model):
name = models.CharField(max_length=300)
persons = DictField() # stores {person_id: time_lived} - persons, who lived here
forms.py:
class PersonListForm(forms.Form):
persons= forms.MultipleChoiceField(choices=
((person['id'], person['name'].lower()) for person in sorted(
Person.objects.all().values('id', 'name'), key=itemgetter('name'))),
label='Choice person list:'
)
views.py:
class ChoicePersonView(FormView):
template_name = 'guess_houses.html'
form_class = PersonListForm
def get(self, request, *args, **kwargs):
form = self.form_class(initial=self.initial)
return render(request, self.template_name, {'form': form})
def post(self, request, *args, **kwargs):
form = self.form_class(request.POST)
if form.is_valid():
persons_id = form.cleaned_data['persons']
houses = [] # list of houses i want to display
t1 = time()
comb = [] # I need all houses, where lived any of these persons
for r in range(1, len(persons_id)+1):
comb += [i for i in combinations(persons_id ,r)]
for id_person_dict in House.objects.all().values('id', 'persons', 'name'):
for c in comb:
if set(c).issubset(set(id_person_dict['persons'])):
if id_person_dict not in houses:
houses.append(id_person_dict)
return render(request, self.template_name, {'form': form, 'houses': houses, 't': time() - t1})
我所要求的任何建議,以優化我的應用程序,謝謝!
什麼是組合代碼? – ahmed
@ahmed thats從itertools模塊的功能。 https://docs.python.org/2/library/itertools.html#itertools.combinations – vadimb